Cheese head hex socket screw(allen bolt)

Cheese head hex socket screw

Standards:DIN912/ISO4762/ASME B18.6.3
Material: carbon steel/alloy steel with heat-treatment.
Surface:electroplated coatings like zinc,black zinc, nickel,H.D.G etc.
Mechanical and physical properties:
Property class:8.8/10.9/12.9 for metric sizes
Grade 5/8 for inch sizes

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