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Column
January 20th, 2025

What is a Cap Hex Socket Screw? | Simple Explanation in 3 Minutes: A cap screw (cap bolt) is a type of screw with a cylindrical (cap-shaped) head that has a hexagonal socket. It is officially called a “hex socket head bolt” or “hex socket head cap bolt.” Typically, it is tightened and loosened using a hex wrench and is widely used in industrial applications and machinery assembly. Cap screws (hex socket head bolts) and set screws (grub screws) are characterized by their hexagonal socket drive shape, allowing for high torque tightening. The hexagonal socket allows for even distribution of tool pressure at six points, reducing wear on the drive socket during fastening. They are one of the most common types of screws, along with machine screws and hex bolts. Cap screws are primarily made of steel, with materials such as S45C and SCM435 undergoing heat treatment for increased hardness. Cap screws are used not only for fastening machinery and equipment but also in applications where frequent fastening and loosening are required. While screws typically wear out over repeated use, cap screws withstand repeated fastening due to their hexagonal socket shape and heat-treated strength. Types of Cap Screws: Cap (Hex Socket Head Bolt) Button Cap Countersunk Cap Set Screws (Cup Point, Flat Point, Cone Point, Dog Point, Double Point) Ball Plunger Plug Shoulder Bolt Air Vent Cap Choosing the right type is essential depending on the environment and application. Due to their ability to handle high torque and frequent fastening, cap screws are commonly used in manufacturing jigs, vises, and mold fastening. They are also widely used in machinery and equipment where high-torque fastening is needed. The hexagonal socket shape allows end users to fasten with minimal tools. Examples of Applications: Cap (Hex Socket Head Bolt): Mold and jig fastening, high-torque applications, designs requiring minimal tools for assembly. Button Cap: Mold and jig fastening, high-torque applications, assembly with minimal tools. Countersunk Cap: Mold and jig fastening, high-torque applications, assembly with minimal tools. Set Screws (Cup Point, Flat Point, Cone Point, Dog Point, Double Point): Component assembly. Ball Plunger: Used for positioning, indexing, and ejecting sliding or rotating parts. Plug: Used in hydraulic and pneumatic equipment, pumps, and automobiles to stabilize airflow and oil flow. Shoulder Bolt / Stripper Bolt: These bolts have a long shank with a precision ground finish. They are commonly used for shaft fixing in moving parts, as well as in engines, pulleys, and vacuum systems. Air Vent Cap: Used ...

Column
January 15th, 2025

What is a Construction Screw? | Simple Explanation in 3 Minutes: Construction screws are screws used in architecture and civil engineering to fasten and join various building materials such as wood, concrete, and metal. These screws are designed to enhance work efficiency and durability in construction sites. Construction screws are special screws used in the architecture and construction industries. By using these screws, materials can be fastened more securely than with nails. Therefore, they are used in assembling, installing, and fixing building materials and structures, making them essential in situations where safety and durability are required. High Load Capacity: Construction screws are designed to support heavy loads and structural elements, requiring high load capacity. Corrosion Resistance: Since construction screws used outdoors are exposed to weather conditions, they are made from corrosion-resistant materials such as zinc plating, stainless steel, or special coatings. Heat Resistance: Some construction screws need to withstand high temperatures, making them suitable for applications like heating system installations. Construction screws are essential for ensuring the safety and durability of construction projects. Choosing the right screws for specific building materials and environments is crucial. Construction screws are widely used in various building scenarios, including the following: Wooden Structures: Widely used for assembling wooden structures such as houses, furniture, decks, fences, and outdoor structures. Concrete Structures: Concrete screws and anchor bolts provide stability when attached to concrete or stone buildings, used in building foundations, walls, floors, railings, and columns. Metal Structures: Metal screws are used in assembling steel structures and ironworks, necessary for bridges, towers, railway vehicles, and industrial facilities. Outdoor Facilities: Construction screws are used to secure outdoor installations such as streetlights, signs, utility poles, gazebos, and playground equipment. Fire-Resistant Structures: Fire-resistant screws are used in fireproof structures and high-temperature environments, necessary for fire protection equipment, ovens, boilers, and industrial furnaces. Interior Construction: Used in interior work for securing wall panels, ceilings, flooring, and furniture, especially in residential interior projects. For inquiries regarding samples or materials, please respond to this email or contact our sales representative! At Ohta Vietnam, we not only provide ready-made products such as screws and bolts, but also support activities in the manufacturing field such as cutting, inspection, assembly, packaging… Our equipment list is here As a “specialized support” for the manufacturing industry in Asia. If you have any related questions, feel free to contact Ohta Vietnam for detailed support! URL: https://ohtavn.com/en/contact/

Column
January 05th, 2025

What is a Tamper-Resistant Screw? | Simple Explanation in 3 Minute: Tamper-proof screws are specially designed screws that prevent intentional removal. They are used to ensure security and safety, particularly in public spaces and environments where safety is a priority. They are also commonly referred to as “security screws.” Tamper-proof screws differ from regular screws in that they have a special design and structure. As the name suggests, their primary purpose is to make installation and removal difficult, preventing tampering and unauthorized access. They are typically made from materials such as stainless steel or iron. Because of these properties, tamper-proof screws are often used for security, crime prevention, and safety applications. Below are the key features of tamper-proof screws: Special Head Shapes: Tamper-proof screws have unique head shapes different from standard screws. For example, they may have hexagonal holes or grooves designed to resist slipping, making them difficult to handle with regular tools. Requires Special Tools: Tamper-proof screws cannot be removed with standard screwdrivers or wrenches. Instead, they require dedicated removal tools, which are not easily accessible to the general public. Beyond preventing simple tampering, these screws have a wide range of applications. For example, they are used in public facilities to prevent vandalism and theft, and in private companies to prevent disassembly of electronic devices. Tamper-proof screws are widely used in the following areas: Public Facilities: Tamper-proof screws help protect public facilities and public transportation infrastructure (benches, signs, lighting, etc.) from vandalism and destruction. Automotive Industry: Tamper-proof screws are used to secure vehicle license plates and components, preventing theft and damage. Construction Industry: These screws contribute to building and facility security by preventing unauthorized entry and destruction. Information Security: Tamper-proof screws are used to secure server racks and network equipment, enhancing physical access restrictions. Tamper-proof screws are essential elements in improving security in specific environments and applications. Their design and characteristics help protect valuable assets and facilities from unauthorized tampering. If you have any questions about samples or materials, please reply to this email or consult with our sales representatives! At Ohta Vietnam, we offer services ranging from the sale of standard products such as screws and bolts to machining, inspection, assembly, and packaging, covering the broader scope of manufacturing. For a list of our equipment, please click here. As the “handyman” of Asia’s manufacturing industry, feel free to consult Ohta Vietnam for any challenges you face! URL: https://ohtavn.com/contact/

Column
January 01st, 2025

What is a High-Tech Screw? | Simple Explanation in 3 Minutes: High-tech screws are a general term for screws with special functions and high performance, designed to meet high demands that conventional screws cannot handle. These screws are used in many fields to achieve product miniaturization, weight reduction, increased strength, and improved durability. High-tech screws are also commonly referred to as “high-performance screws” or “special screws.” These screws are designed to meet specific applications and environmental conditions. The primary use of high-tech screws is for reinforcing and connecting parts. For example, they are widely used for repairing everyday household items. Additionally, they have a unique tip shape that makes tapping easier. (Even without a pre-made internal thread, the screw itself can create threads in the material and secure it.) There are many types of high-tech screws, including: ・Sunlock ・Evatite ・Deltite ・Dia Screw ・Tap Type ・Deltite ・SP Seated Screw ・TP Screw ・FT Screw ・Nonsert (+) Pan Head ・Lip Screw (+) Pan Head etc. High-tech screws are mostly made of stainless steel, but there are significant differences in their dimensions and head shapes. High-tech screws are mainly used for fastening materials such as wood, thin steel sheets, aluminum alloy plates, and plastic sheets. They are well-suited for thinner materials, allowing for a wide range of applications. Since they eliminate the need for internal thread processing or insert nuts, they are often used to reduce fastening costs and improve work efficiency. If you have any questions about samples or materials, please reply to this email or consult with our sales representatives! At Ohta Vietnam, we offer services ranging from the sale of standard products such as screws and bolts to machining, inspection, assembly, and packaging, covering the broader scope of manufacturing. For a list of our equipment, please click here. As the “handyman” of Asia’s manufacturing industry, feel free to consult Ohta Vietnam for any challenges you face! URL: https://ohtavn.com/contact/

Column
December 25th, 2024

What is a Tapping Screw? | Simple Explanation in 3 Minutes: A tapping screw is a type of screw that can create its own threads while being fastened into a pre-drilled hole. In English, it is called a “Tapping Screw” and is commonly used to secure thin materials such as metal, plastic, and wood. It is widely utilized in various fields, including construction, machinery, and household appliances. A tapping screw is a screw that can form threads in a material as it is driven in. (Even without a pre-threaded hole, the screw itself can create threads and secure the material.) The main difference between a tapping screw and a drill screw is that a tapping screw requires a pre-drilled hole (made with a drill or bit). In a standard process, a pre-drilled hole would typically need tapping to create internal threads, but a tapping screw can create threads in the material as it is driven in. The main head types of tapping screws include pan head, flat head, and truss head. Tapping screws are mainly made from iron or stainless steel. When a tapping screw is driven into a material, resistance occurs, which reduces the fastening force, leading to lower axial force. Compared to machine screws, tapping screws generally have lower axial force. Tapping screws are primarily used to fasten materials such as wood, thin steel plates, aluminum alloy plates, and plastic sheets. Since they are suitable for thin materials, they offer a wide range of applications. By eliminating the need for pre-threaded holes or insert nuts, they help reduce fastening costs and improve work efficiency. Tapping screws have six different thread types: ・Type 1A The coarsest pitch among tapping screws. Used for wood, hardboard, thin steel plates (1.2mm or less), asbestos, etc. ・Type 2B0 The first 2 to 2.5 threads from the tip are tapered. Used for thin steel plates (5mm or less), plastic, hard rubber, etc. ・Type 2B1 A modified version of Type 2 tapping screws with the first quarter of the tip removed. Used for thin steel plates (5mm or less), plastic, non-metal materials, hard rubber, etc. ・Type 3C0 The first 2.5 to 3 threads from the tip are tapered. Can be used for structural steel, cast iron, and non-ferrous metals, suitable for thicker materials compared to Type 2 screws. ・Type 3C1 A modified version of Type 3 tapping screws with the first quarter of the tip removed. Used for structural steel, cast iron, and non-ferrous metals. ・Type ...

Column
December 20th, 2024

What is a Drill Screw?｜Simple Explanation in 3 Minutes: A drill screw is a special type of screw with a drill-shaped tip that allows it to be fastened directly into materials without the need for pre-drilling holes. It is commonly used in construction and industrial fields, making it easy and efficient to secure materials such as steel plates, aluminum sheets, and wood. A drill screw has a tip that is processed like a cutting blade, allowing it to fasten into metal without pre-drilling holes by using power tools such as an impact driver. Since it can be directly screwed into metal or wood without prior drilling, it significantly reduces labor time. Its primary application is in construction. For example, it is useful for fastening steel plates together or securing wood and boards to steel plates. As mentioned above, it helps reduce effort and speeds up the construction process, making it highly efficient. Drill screws are mainly made from carbon steel and stainless steel. They provide strong fastening capabilities and can maintain high strength over long periods. The pointed tip of a drill screw allows it to be screwed in directly without pre-drilling holes. This makes assembly work easier and faster, significantly reducing work time. Additionally, drill screws provide a strong and secure connection. One common application is in fastening factory exterior walls and roofs. In such cases, rubber or sponge-like washers are often integrated into the screw design. These washers prevent water from leaking through the holes made by the screw, ensuring a secure and waterproof installation. As a multifunctional screw, drill screws are widely used in construction and metalworking industries. In the construction industry, they are used for exterior walls, roofs, floors, window frames, and signboard installations. In the metalworking industry, they are used for sheet metal work and metal product assembly. Drill screws are particularly suitable for outdoor applications and areas exposed to rain and wind. For inquiries regarding samples or materials, please respond to this email or contact our sales representative! At Ohta Vietnam, we not only provide ready-made products such as screws and bolts, but also support activities in the manufacturing field such as cutting, inspection, assembly, packaging… Our equipment list is here As a “specialized support” for the manufacturing industry in Asia. If you have any related questions, feel free to contact Ohta Vietnam for detailed support! URL: https://ohtavn.com/en/contact/

Column
December 15th, 2024

What is a Micro Screw?｜Simple Explanation in 3 Minutes: Micro screws are extremely small screws used in the assembly of precision equipment and compact devices. Generally, they refer to screws with a diameter of less than 1mm to a few millimeters, and they play an active role in situations requiring particularly fine fastening. As the name suggests, micro screws are extremely small screws. They are finer than regular screws, with particularly smaller heads compared to other screws. They are essential for precise assembly and repair work. However, due to their small size, specific tools and techniques may be required in certain situations. Micro screws are made from various materials, including iron, brass, and stainless steel. Since different materials are used depending on the application, it is necessary to consult with an expert before selecting the appropriate screw for a product. Micro screws are responsible for joining and securing small components. They play a crucial role, especially in the assembly of precision equipment and electronic devices. Common examples include cameras and eyeglasses. In recent years, as machines have become smaller, the applications for micro screws have expanded, increasing the demand for screws even smaller than size 0, known as size 00. Size 0 refers to the driver size for the screw head. There are different types of micro screws, such as size 0 type 1 and size 0 type 3. These classifications indicate the size and thickness of the screw head—the larger the number, the larger and thicker the screw head. Additionally, there are two types of screw heads: “pan head” and “flat head.” Pan Head: A rounded screw head on the top surface. Flat Head: A screw head with a flat top surface. For inquiries regarding samples or materials, please respond to this email or contact our sales representative! At Ohta Vietnam, we not only provide ready-made products such as screws and bolts, but also support activities in the manufacturing field such as cutting, inspection, assembly, packaging… Our equipment list is here As a “specialized support” for the manufacturing industry in Asia. If you have any related questions, feel free to contact Ohta Vietnam for detailed support! URL: https://ohtavn.com/en/contact/

Column
December 05th, 2024

What are Embedded Screws?｜Simple Explanation in 3 Minutes: Embedded screws (or embedded bolts) are screws that are integrated with washers. This type of screw is designed to improve work efficiency by eliminating the need to separately prepare or install washers during fastening. Embedded screws are small screws or bolts pre-assembled with washers. *Washers are used to prevent screws from loosening and to avoid sinking of the seating surface due to tightening pressure. Since washers are assembled before threading the screw, there is no need to insert the washer during tightening, preventing washer loss or installation omission and improving work efficiency. Additionally, the inner diameter of the assembled washer is smaller than the screw thread diameter (outer diameter), ensuring that the washer does not fall off after threading. There are two main manufacturing methods for screws: “cutting,” which creates threads by machining, and “rolling,” which forms threads by applying pressure. In this process, simply attaching a washer is not enough, and specialized machines for assembling washers are required. The primary purpose of embedded screws is similar to the use of washers: preventing loosening and avoiding sinking of the seating surface. A significant feature is the added improvement in work efficiency. For instance, using flat washers increases the contact surface area compared to fastening with screws alone. This results in greater friction, providing a stronger anti-loosening effect. There are various types of embedded screws to match different kinds of washers (W=Washer). This section is omitted, but there are examples such as P=1, P=2, etc. A single washer assembly is called a single SEMS, and a double washer assembly is called a double SEMS. Therefore, when selecting embedded screws, it is necessary to choose a type based on the purpose and specify screw diameter, shaft length, etc. For inquiries regarding samples or materials, please respond to this email or contact our sales representative! At Ohta Vietnam, we not only provide ready-made products such as screws and bolts, but also support activities in the manufacturing field such as cutting, inspection, assembly, packaging… Our equipment list is here As a “specialized support” for the manufacturing industry in Asia. If you have any related questions, feel free to contact Ohta Vietnam for detailed support! URL: https://ohtavn.com/en/contact/

Column
December 01st, 2024

What is a small screw?｜A simple 3-minutes explanation: Small screws are screws with relatively small sizes used to fasten machinery and components. Generally, they refer to screws with diameters ranging from 1mm to 12mm, which are widely used in precision instruments and household appliances. Small screws consist of a threaded part (male thread) and a head, serving the purpose of fastening materials. Small screws are used in various hidden areas of equipment, devices, and everyday items, regardless of scale. As the name suggests, small screws generally have thread diameters of up to φ12mm and are used for fastening in precision equipment. Depending on the required application, differences in head shape, thread standards, materials, and surface treatments are utilized. The primary material is iron, but depending on the application, standardized products made from stainless steel, brass, titanium, aluminum, and resin are also available. For small screws, manufacturing is primarily done through cold forging and thread rolling, though some are also produced using machining processes. Small screws play a crucial role in assembling delicate parts and machines, often used in areas not visible to the general public. They are essential components in products requiring precise movements or design, such as fixing circuit boards in electronic devices, assembling medical equipment, and other precision instruments. Depending on differences in head shapes or special functions, there are various types of small screws, such as pan, flat, truss, tamper-proof, and fall-prevention screws. Some representative examples include: – Pan Head Screws – Flat Head Screws – Oval Flat Head Screws – Truss Screws – Bind Screws – Upset Screws – Combination Screws (SEMS Screws) – Fall-Prevention Screws – Air Vent Bolts/Screws – Tamper-Proof Screws For inquiries regarding samples or materials, please respond to this email or contact our sales representative! At Ohta Vietnam, we not only provide ready-made products such as screws and bolts, but also support activities in the manufacturing field such as cutting, inspection, assembly, packaging… Our equipment list is here As a “specialized support” for the manufacturing industry in Asia. If you have any related questions, feel free to contact Ohta Vietnam for detailed support! URL: https://ohtavn.com/en/contact/

Column
November 25th, 2024

What are Pro Tools? | Simple Explanation in 3 Minutes: “Pro Tools” in manufacturing refers to tools used by professionals and technicians involved in the manufacturing process, quality control, and other related tasks. These include consumables, tools, and supplies required in factories, construction sites, warehouses, and offices. These tools contribute to streamlining manufacturing operations, improving productivity, and ensuring quality. Pro tools are indispensable in the manufacturing industry, helping companies maintain competitiveness in their manufacturing processes and enhancing product quality and efficiency. Types of pro tools include machine tools, protective equipment, repair materials, and packaging materials used by individuals involved in manufacturing. These can be categorized as follows: *Details of various pro tools: https://ohtavn.com/en/business-cat/pro-tools/ ・Cutting Tools Turning and milling tools Drilling tools Threading tools Chamfering tools ・Production Processing Supplies Tooling and jigs Magnet supplies Measuring tools Measurement equipment Fluid fittings and tubes Pneumatic and hydraulic equipment Industrial filters Small machining machines and heaters Drive equipment and bearings Machine parts Architectural hardware and factory partitions Casters Screws, bolts, and nuts Fastening tools Soldering and anti-static supplies Electrical and electronic components Electrical installation components Adhesives and repair materials Chemical products ・Work Tools Wrenches, spanners, and pullers Screwdrivers and hex keys Pliers and nippers Scissors, cutters, and sheet metal tools Hammers, stamps, and punches Clamps and vices Non-sparking and insulated tools Automotive maintenance tools and grease guns Electrical installation tools Plumbing and HVAC tools Toolboxes and tool bags Power tools and hydraulic tools Driver bits Pneumatic tools Cutting tools Grinding and polishing tools ・Construction Tools Pipework equipment Pumps Generators and compressors Civil engineering and carpentry tools Surveying equipment Painting and interior finishing tools Welding supplies Cord reels and extension cords Work lights and lighting equipment Ladders and step stools ・Office and Facility Supplies Storage sheds and exterior supplies Office furniture Office automation and stationery ・Environmental and Safety Supplies Protective equipment Safety supplies and signs Disaster prevention and security supplies Temperature control supplies Environmental improvement equipment Cleaning supplies Hoses and watering supplies Greening supplies Occupational health supplies Tape supplies Packaging and bundling supplies Sheets and ropes ・Logistics and Storage Supplies Storage racks Workbenches Tool wagons Tool cabinets and container racks Transport carts Lifters and hand pallets Conveyors Chain blocks and cranes Lifting clamps and belts Jacks and winches Containers and pallets Storage supplies Bottles and containers As mentioned, pro tools play a significant role in improving the efficiency of manufacturing operations, enhancing productivity, and ensuring quality. However, since manufacturing involves numerous processes, the variety of ...