.438-1.000 MS15795 Military Flat Washer 300 Series Stainless Steel DFAR Black Ox HTP410 The screw's head is a

The screw's head is a hex shape

The serrated thread provides a strong hold and resists loosening

while its fully threaded design provides maximum holding power

045 Type B Flat Washer Regular Zinc is a flat

.438-1.000 MS15795 Military Flat Washer 300 Series Stainless Steel DFAR Black Ox HTP410 The screw's head is aThe . 438 1. 000 MS15795 Military Flat Washer is a high quality fastener designed to meet the demanding requirements of military applications. It is made from 300 series stainless steel, which provides excellent corrosion resistance and strength. The washer has a black oxide finish that provides additional protection against corrosion and wear. It is designed to be used with bolts and screws with a diameter of . 438 inches and a thickness of 1. 000