{"id":4695,"date":"2025-09-19T10:00:05","date_gmt":"2025-09-19T01:00:05","guid":{"rendered":"https:\/\/ohtavn.com\/?post_type=media&p=4695"},"modified":"2025-09-12T14:06:58","modified_gmt":"2025-09-12T05:06:58","slug":"specific-examples-and-key-points-for-selecting-screws-to-achieve-cost-reduction","status":"publish","type":"media","link":"https:\/\/ohtavn.com\/en\/media\/specific-examples-and-key-points-for-selecting-screws-to-achieve-cost-reduction\/","title":{"rendered":"Specific examples and key points for selecting screws to achieve cost reduction"},"content":{"rendered":"
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Introduction<\/h3>\n<\/div>\n
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Due to rising raw material and labor costs and the increasing complexity of supply chains, “high component costs” and “increased man-hours” have become chronic challenges in the manufacturing industry. Among these, fastening components such as screws and bolts, while accounting for a small portion of the product cost at an average of around 5%, are crucial parts that\u00a0influence up to 50% of assembly man-hours<\/strong>. Proper screw selection is a “double-punch” cost reduction measure that affects both material costs and labor man-hours.<\/p>\n<\/div>\n

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Based on the experience Ohta Vietnam has cultivated on-site in various Asian countries, this article will quantitatively show the impact of screw selection on costs, while introducing practical improvement measures from four perspectives: manufacturing method, standards, quantity, and assembly man-hours<\/strong>. Rather than just theory, the aim is to provide guidelines that readers can immediately utilize in their own company projects by focusing on case studies that have proven effective at bases in Asia, including Vietnam.<\/p>\n<\/div>\n

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The intended readers are design and purchasing managers in Japan, and production technology and procurement managers at local factories in Vietnam. It is our hope that those who are struggling with “which screw to choose” for cross-border procurement or mass production ramp-ups can achieve\u00a0sustainable screw cost reduction<\/strong>\u00a0with this article as a guide.<\/p>\n<\/div>\n

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Source: Western Fastener<\/p>\n<\/div>\n

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Overall Picture of Screw Costs\uff5cCost Breakdown and 4 Perspectives<\/h3>\n<\/div>\n
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Breakdown of Screw Costs\uff5cMaterial, Processing, Surface Treatment, Logistics<\/h4>\n<\/div>\n
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The total cost of a screw is composed of the four elements in the table below.<\/p>\n<\/div>\n

\n\n\n\n\n\n\n\n\n\n
<\/th>\n<\/th>\n<\/th>\n<\/tr>\n<\/thead>\n
Cost Element<\/strong><\/td>\nRepresentative Content<\/strong><\/td>\nEstimated Composition Ratio*<\/strong><\/td>\n<\/tr>\n
Material Cost<\/td>\nBase materials such as carbon steel, stainless steel, titanium + wire processing costs<\/td>\n35\u201350%<\/td>\n<\/tr>\n
Processing Cost<\/td>\nCold heading, cutting, thread rolling, heat treatment<\/td>\n25\u201340%<\/td>\n<\/tr>\n
Surface Treatment Cost<\/td>\nZinc plating, nickel plating, black oxide coating, lubricant application<\/td>\n10\u201315%<\/td>\n<\/tr>\n
Logistics Cost<\/td>\nPackaging, packing, transportation, inventory and lot management<\/td>\n5\u201310%<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
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*Ohta Vietnam internal average values (vary depending on product specifications and lot size).<\/p>\n<\/div>\n

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Even for special machined parts where processing costs tend to be high, it is possible to achieve a reduction of up to 70% by switching to cold heading or thread rolling.<\/p>\n<\/div>\n

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Source: Ikeda Kinzoku Kogyo Co., Ltd.<\/p>\n<\/div>\n

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4 Perspectives for Cost Reduction\uff5cManufacturing Method, Standard Selection, Quantity Optimization, Assembly Man-hours<\/h4>\n<\/div>\n
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  1. Optimization of Manufacturing Method<\/strong>\u00a0– Switch to low-man-hour processes such as cutting \u2192 cold heading, lathe \u2192 thread rolling, to reduce processing costs and lead times.<\/li>\n
  2. Promotion of Standards\/Standardization<\/strong>\u00a0– Replace custom screws with JIS\/ISO standard screws to compress mold and procurement costs.<\/li>\n
  3. Review of Quantity and Lot Design<\/strong>\u00a0– Suppress unit prices and logistics costs with 4\u20136 month lots that consolidate annual demand.<\/li>\n
  4. Reduction of Assembly Man-hours<\/strong>\u00a0– Shorten line tact time by reducing the number of screws or introducing rivets and integrated fasteners.<\/li>\n<\/ol>\n<\/div>\n
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    Source:\u00a0Marumono\/Lathe Machining.COM<\/a>\u00a0\/\u00a0MONOist<\/a><\/p>\n<\/div>\n

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    Benefits and Risks of Procurement in Vietnam<\/h4>\n<\/div>\n
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    Benefits<\/strong><\/p>\n<\/div>\n

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