Screws and bolts with internal drive

BN 1359 - ISO 7379

Headform	Cylindrical
Drive	Hexagon socket
Thread	partially threaded
Material	Steel
Property class	012.9 / 12.9 (The head marking is determining)
Surface	black

Hex socket head shoulder bolts
Steel - 012.9 / 12.9 (The head marking is determining) - black

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