6-Lobe Screw

A 6-lobe screw is a screw with a six-lobe recess in the head. It is driven with a matching six-lobe driver. The recess gives good torque transfer and less cam-out than some other drives.

A 6-lobe screw drives with a six-lobe key or bit, which gives a firm grip and less cam-out than a cross recess. It suits assembly work where the head is driven repeatedly. It often takes a nut or a tapped hole of the same thread.

This kind of screw is usually made in steel or stainless steel. Steel grades can be plated for corrosion resistance. Stainless steel grades resist rust without plating.

This is a general guide to checking this kind of part. It says nothing about any supplier's parts.

Ask for a certificate of conformance and a mill test certificate if the material grade matters. On receipt, check the recess with a matching driver bit and check the thread with a gauge. Confirm the head shape and drive size before use.