#8 MS35333, Military Internal Tooth Lock Washer 410 Stainless Steel DFAR MPTBZ It has a six lobe

It has a six lobe pan head with a fully threaded shank

The 6-lobe drive design allows for easy and efficient installation using a hex key

They are made from high-quality steel and have a black oxide finish for increased durability

which means that it has a cross-shaped recess in the head for driving with a Phillips screwdriver

and the socket head allows for easy installation with a hex key

#8 MS35333, Military Internal Tooth Lock Washer 410 Stainless Steel DFAR MPTBZ It has a six lobeMS35333 is a Military Internal Tooth Lock Washer made of 410 Stainless Steel and compliant with the Defense Federal Acquisition Regulation Supplement (DFARS). It is designed to prevent loosening of threaded fasteners due to vibration, shock, or other dynamic loads. The washer has a serrated inner diameter that bites into the mating surface, creating a high friction grip. It is commonly used in aerospace, military, and other demanding applications