ISUZU ISD-C01-500B PDF

This standard covers the cold-forged steel hexagon-socket-head bolts, mainly used in automobiles (hereinafter referred to as "bolts").

Note: The bolts of this standard are used where space restriction around the hexagon head refuses the tool access to the heads for driving them, such as in the case of sinking a hex head into a spot faced recess. The bolts of this standard are smaller in the bearing surface area than their corresponding hexagon head bolts by 30 to 60%, making it difficult to secure axial tension appropriate for their property class; therefore, they will be gradually restricted in use as standard parts and will be used as the parts for special uses, for which drawings are issued.