Zinc, 4mm

Metric Fasteners, Zinc, 4mm
Hex bolts Bolts with hexagonal heads and machine threads for use with a nut or in a tapped hole. Also known as hex cap screws or machine bolts.	Machine screws Screws with machine threads for use with a nut or in a tapped hole.
Socket screws Screws with an Allen wrench drive.	Nuts Nuts have internal machine threads, for use with machine thread bolts and screws.
Threaded inserts & Rivet nuts For adding a machine thread to material that otherwise cannot be tapped.