Square head bolts to DIN 479 and GB 8-88 with a large bearing surface for wrenches in heavy and dirty working conditions. Carbon steel, grades 4.8–8.8, plain or hot-dip galvanized. Common in agriculture, mining, railways and structural steel. ISO 9001:2015 certified factory · OEM/ODM supported · Bulk MOQ 500 pcs.
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Square head bolts to ASME B18.2.1 and DIN 478 for applications where the head must be held by hand or wrench in wood and heavy machinery. Commonly hot-dip galvanized for utility poles, water gates and agricultural equipment; M10 to M24.
Need a quotation? Send us your specification - MOQ from 1,000 pcs, lead time 7-15 days, ISO 9001:2015 certified with EN 10204 3.1 material certificates.
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