FF-W-100 Military Specifications Fasteners

Mil spec FF-W-100 covers tooth lock washers for use in assemblies with bolts, studs and machine screws.

Type I – Internal tooth flat

  • Grade A - Regular
  • Grade B – Heavy duty

Type II – External tooth flat

Type III – Internal-external tooth flat

Type IV – External tooth countersunk (80˚-82˚)

Type V – External tooth countersunk (99˚-101˚)

  • Style 1 – Twisted teeth
  • Style 2 – Teeth with up-and-down bent edges