描述
M6 标准六角头螺钉 螺栓 DIN 933 钢制镍镀层紧固件
M1.6 to M52 standard DIN933 hex cap screws with grade 4.8 to 12.9 for vast applicaton requests .
Hex cap screw is also known as hex bolt . Normally . it has a hexagonal head with chamfer edges for hex socket wrench or spanner rotating during operation , machine thread style is fine or course and the threaded length is about 2/3 of total shaft length for the lengths over 70 mm .
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