Internal Lock Washers - 1/4" - Zinc-Plated - 20/Pkg

Internal lock washer with serrated inner diameter for 1/4" bolt applications. Zinc-plated steel construction provides corrosion protection. Mechanical locking mechanism prevents fastener loosening through tooth engagement with mating surfaces. Deforms under clamping load to maintain preload tension. Specification complies with standard dimensional requirements for internal lock washer applications in mechanical assemblies.