#8 MS35333, Military Internal Tooth Lock Washer 410 Stainless Steel DFAR MPTBZ and the socket head allows

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

The screw is made from 18-8 stainless steel and is passivated and waxed for corrosion resistance

It is manufactured from alloy steel and heat treated to achieve a minimum tensile strength of 120

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

#8 MS35333, Military Internal Tooth Lock Washer 410 Stainless Steel DFAR MPTBZ and the socket head allowsMS35333 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