The component grade is A as specified by JIS B1021! Hexagon socket bolts with thorough quality control.
The "Hexagon Socket Bolt" is a product of Okai Iron Works Co., Ltd., which manufactures and sells various fasteners and precision parts. Our company anticipates needs and proposes optimal products. 【Features】 ■ A thorough inspection system that meets JIS standards ■ Comprehensive quality control and rational product management ■ Dedicated automatic warehouses for molds and products ■ Quick response to sudden orders with "immediate production and shipping" ■ High productivity through the introduction of advanced equipment *For more details, please refer to the catalog or feel free to contact us.
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【Specifications】 ■Component Grade: A as specified by JIS B1021 ■Strength Classification: Steel bolts with a diameter of M39 or less are classified as 8.8, 10.9, and 12.9 ■Property Classification: Stainless steel bolts with a diameter of M20 or less are classified as A2-70 ■Thread Grade: Steel bolts of grades 8.8 and 10.9 are classified as 6g and Class 2 for metric coarse threads, while grade 12.9 is classified as 5g, 6g, and Class 2. Stainless steel bolts are classified as 6g and Class 2. ■Material: Materials specified in JIS B1051-3 are used, for example, SCM435 for grade 12.9, and SNCM240 is subjected to heat treatment (QT). The material for stainless steel bolts is A2 as specified by JIS B1054, with SUS304 and XM7 being applicable. ■Surface Treatment: Steel bolts have a black oxide coating, while stainless steel bolts are left in their natural state. ■JIS Mark: As of September 1989, JIS B1176 hexagon socket bolts are permitted for display (Permit Number 589044) *For more details, please refer to the catalog or feel free to contact us.
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For more details, please refer to the catalog or feel free to contact us.
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Company information
Okai Iron Works Co., Ltd. is a company engaged in the manufacturing and sales of various fasteners and precision parts. We mainly handle hex socket items, automotive parts, and construction parts. Our company employs a consistent quality management system from the acceptance of raw materials to pre-packaging, along with a rapid supply system utilizing automated warehouses, ensuring that the trusted "OKAI brand" is always delivered in the most optimal form and promptly. For all your parts and fastener product needs, please leave it to us!