Value Collection SIWIX037USA-025BX Lock Washer 3/8 in

Product Description

The VALUE COLLECTION SIWIX037USA-025BX is a stainless steel internal tooth lock washer sized for 3/8 inch screws. It features an inside diameter of 0.398 inches and an outside diameter of 0.692 inches, with a thickness of 0.035 inches. Constructed from Grade 18-8 stainless steel with an uncoated finish, this washer delivers corrosion resistance suitable for demanding environments. The internal tooth design bites into the mating surface and fastener head to resist loosening under vibration. It is sold in a minimum order quantity of 25 pieces.

This internal tooth lock washer suits applications across HVAC equipment, plumbing assemblies, electrical enclosures, and pool mechanical systems where a 3/8 inch fastener requires secure locking. Grade 18-8 stainless steel makes it appropriate for installations exposed to moisture or mild corrosive conditions. It fits residential and light commercial equipment panels, brackets, and structural fastening points where vibration or thermal cycling can cause conventional fasteners to back out over time.

Key Features

• Internal tooth configuration grips both the fastener head and the work surface simultaneously
• Grade 18-8 stainless steel construction for corrosion resistance in wet or outdoor environments
• 0.398 inch inside diameter fits standard 3/8 inch screw shanks
• 0.692 inch outside diameter provides adequate bearing surface without excessive footprint
• 0.035 inch thickness allows use in tight clearance assemblies
• Uncoated finish avoids galvanic complications with stainless fasteners

Compatibility

Designed as a standard internal tooth lock washer for 3/8 inch screws and bolts across general mechanical, HVAC, plumbing, and electrical assembly applications.

Installation Notes

Install between the fastener head and the mating surface with the teeth facing the fastener head and the flat side against the work surface. De-energize or depressurize any equipment before disassembling fastened joints. Standard hand tools apply; do not over-torque, as excessive clamping force can flatten the teeth and reduce locking effectiveness.