3/32 x 7/8 MS9245, Extended Prong Chisel Point Cotter Pins T321 Stainless DFAR 8-32-3 It has a hex washer

It has a hex washer head with an indented drive that provides a secure hold and prevents slippage

This wing nut is commonly used in automotive

while its internal washer helps distribute the load and prevent damage to the mating surface

The "B" prefix indicates that the screw is black oxide coated

3/32 x 7/8 MS9245, Extended Prong Chisel Point Cotter Pins T321 Stainless DFAR 8-32-3 It has a hex washer3 32" x 7 8" MS9245 Extended Prong Chisel Point Cotter Pins T321 Stainless DFAR are designed for use in high vibration and high stress applications. They are made from 300 series stainless steel and have a chisel point that provides a secure hold in the hole. The extended prongs help to prevent the pin from backing out, and the T321 coating provides corrosion resistance. These cotter pins meet the requirements of MS9245 and are DFAR compliant.