This listing is for Socket Cap Head Screws/Bolts in Metric Coarse Thread of M4 in Stainless Steel. Pack Size is 8pcs.

M4

Thread Diameter - M4 (4mm)
Pitch - 0.70mm
Socket Wrench Size - 4mm
Head Diameter - 8mm
Head Depth - 4mm

The length (24mm) of the cap head screw/bolt is measured from the underside of the head to the end of the thread.