Value Collection SIWIS0750USA-100BX Lock Washer 3/4 in

Product Description

The VALUE COLLECTION SIWIS0750USA-100BX is a 3/4 inch screw-size internal tooth lock washer designed to provide secure fastening in mechanical and structural assemblies. Constructed from Grade 2 steel with a zinc-plated finish, this washer resists corrosion and delivers consistent clamping force under vibration loads. The internal tooth design bites into both the fastener bearing surface and the mating surface to prevent loosening. With an inside diameter of 0.795 inches, an outside diameter of 1.245 inches, and a thickness of 0.055 inches, this washer is dimensionally precise for standard 3/4 inch fastener applications. Each box contains 100 washers sold as a single package quantity.

This internal tooth lock washer is suited for use in residential and light commercial trade applications including HVAC equipment assembly, electrical panel and enclosure fastening, plumbing fixture mounting, and general mechanical service work. The zinc plating makes it appropriate for indoor and sheltered outdoor installations where mild corrosion resistance is required. Trade professionals in HVAC, electrical, plumbing, and mechanical contracting will find this washer fits standard fastener assemblies wherever vibration resistance is needed at the 3/4 inch screw size.

Key Features

• Internal tooth design bites into fastener and mating surface to resist loosening under vibration
• Grade 2 steel construction provides reliable mechanical strength for general trade fastening
• Zinc-plated finish offers corrosion resistance for indoor and sheltered installations
• Inside diameter of 0.795 inches fits standard 3/4 inch screw fasteners
• Outside diameter of 1.245 inches and thickness of 0.055 inches meet standard dimensional requirements
• Sold in a minimum order quantity of 100 units — suitable for service stock and field kits

Compatibility

Designed as a standard-dimension internal tooth lock washer for use with 3/4 inch screw fasteners in general mechanical, electrical, HVAC, and plumbing assembly applications. Does not meet military specifications.

Installation Notes

Installation is performed by qualified tradespeople following applicable mechanical and electrical codes. Place the washer on the fastener with the teeth facing the bearing surface of the bolt head or nut before tightening. Do not reuse lock washers that have been fully compressed or deformed, as they will not provide effective locking force. Ensure mating surfaces are clean and free of debris before assembly to allow proper tooth engagement.