Value Collection ITLW-250-316SS Internal Tooth Lock Washer

Product Description

The VALUE COLLECTION ITLW-250-316SS is a Grade 316 stainless steel internal tooth lock washer designed for use with 0.25 inch screws. The washer features an inside diameter of 0.267 inches and an outside diameter of 0.478 inches, with an uncoated finish that exposes the natural corrosion resistance of 316 stainless steel. Internal tooth geometry bites into both the fastener bearing surface and the mating material, resisting loosening under vibration and thermal cycling. Licensed electricians, plumbers, HVAC technicians, and mechanical contractors use internal tooth lock washers in panel assemblies, equipment mounting, and piping support applications.

This washer is suited for corrosive or moisture-prone environments where standard carbon steel fasteners are not appropriate. Grade 316 stainless steel offers elevated resistance to chlorides and chemical exposure compared to Grade 304, making this washer a practical choice in coastal installations, pool equipment enclosures, chemical handling systems, and marine-adjacent mechanical assemblies. The uncoated surface eliminates coating thickness variability, which is useful when tight dimensional tolerances are required in stacked fastener assemblies.

Key Features

• Internal tooth design locks against fastener rotation under vibration and dynamic loads
• Grade 316 stainless steel construction for superior corrosion resistance in wet and chemical environments
• Inside diameter of 0.267 inches fits standard 0.25 inch screw sizes
• Outside diameter of 0.478 inches provides a stable bearing surface
• Uncoated finish maintains consistent dimensional tolerances
• Lightweight at 0.02 pounds per unit, suitable for high-density fastener assemblies

Compatibility

Designed for use with standard 0.25 inch screws and bolts in mechanical, electrical, plumbing, and HVAC panel or equipment mounting applications where an internal tooth lock washer is specified.

Installation Notes

Internal tooth lock washers are installed by qualified tradespeople following applicable mechanical codes and fastener manufacturer torque guidance. Always de-energize electrical panels and shut off fluid systems before accessing fastened assemblies. Place the washer between the fastener head and the mating surface with the teeth facing the fastener bearing surface. Do not reuse lock washers that have been fully compressed, as tooth engagement may be reduced.