Value Collection SIWIS0250USA-100BX Lock Washer 100 Pack

Product Description

The VALUE COLLECTION SIWIS0250USA-100BX is a zinc-plated, Grade 2 steel internal tooth lock washer sized for 1/4 inch screws. It features an inside diameter of 0.267 inches and an outside diameter of 0.478 inches, with a thickness of 0.028 inches. The internal tooth design bites into both the fastener bearing surface and the mating material, resisting loosening from vibration and torque. This washer is a standard hardware component used across HVAC, electrical, plumbing, and mechanical assembly applications wherever a secure, corrosion-resistant fastening point is required. Sold in a box of 100 pieces.

This internal tooth lock washer is suited for residential and commercial trade work involving panel assembly, equipment mounting, and general mechanical fastening with 1/4 inch screw hardware. The zinc plating provides basic corrosion resistance for indoor and protected outdoor installations. Electricians, HVAC technicians, plumbers, and general mechanical installers commonly use this type of washer when securing components to sheet metal enclosures, junction boxes, brackets, and equipment frames. The 100-piece pack quantity supports job-site or shop-stock use.

Key Features

• Internal tooth design grips fastener and mating surface to resist loosening under vibration
• Grade 2 steel construction provides reliable mechanical strength for standard fastening loads
• Zinc plating offers corrosion resistance for protected and indoor environments
• 0.267 inch inside diameter fits standard 1/4 inch screw shanks
• 0.028 inch thickness keeps fastener stack height minimal in tight assemblies
• 100-piece pack quantity supports bench stock and repetitive installation tasks

Compatibility

Designed for use with 1/4 inch screws and bolts in standard mechanical, electrical, and HVAC assembly applications requiring an internal tooth lock washer.

Installation Notes

Install between the fastener head and the mating surface with the teeth facing the fastener bearing surface. Ensure the mating surface is clean and free of debris before seating the washer. Follow applicable codes such as NEC for electrical enclosure fastening. Do not reuse lock washers that have been fully compressed, as tooth engagement is reduced after initial torque.