Flat hex socket head machine screw

Flat hex socket head machine screw

Standards:DIN 7991/ISO 10642
Material: carbon steel/alloy steel
Surface:electroplated coatings like zinc,black zinc, nickel,H.D.G etc.
Mechanical properties:
Property class: 8.8/10.9/12.9 for metric sizes
Grade 5/8 for inch sizes

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