Te-co 42619 Standard Flat Washer 1/4 in Steel Black Oxide

Product Description

The TE-CO 42619 is a standard flat washer machined from 1010 steel with a black oxide finish. It is designed for use with 1/4-inch screws and fasteners in clamping, workholding, and general mechanical assembly applications. The washer measures 9/32 inches inside diameter, 5/8 inches outside diameter, and 3/16 inches thick. The black oxide finish provides mild corrosion resistance and reduces light reflection in precision tooling and fixture environments. Licensed machinists, tool and die makers, and maintenance technicians routinely install this washer as part of clamp assemblies, jig fixtures, and machine tool setups.

This flat washer is suited for industrial and manufacturing environments where standard inch-series hardware is required. Its 1010 steel construction and TCMAI-standard dimensions make it a reliable choice for workholding fixtures, tooling plates, and mechanical assemblies on machine tools and production equipment. It is sold individually but requires a minimum order quantity of 25 units per purchase.

Key Features

• 1010 steel construction for consistent hardness and machinability
• Black oxide finish for mild corrosion resistance and reduced glare in fixture applications
• 9/32 inches inside diameter fits standard 1/4-inch screws and bolts
• 5/8 inches outside diameter provides broad load distribution
• 3/16 inches thickness for rigid, non-compressible clamping support
• Conforms to TCMAI standards for inch-series flat washers

Compatibility

Designed as an OEM-style replacement flat washer for use with 1/4-inch inch-series fasteners in standard workholding and mechanical assembly applications.

Installation Notes

Installation is typically performed by machinists, maintenance technicians, or fixture builders as part of clamp or fastener assembly. Always de-energize and lock out machinery before servicing any fastener assembly on powered equipment. Verify the washer seats flat against the mating surface before torquing the fastener. Do not use washers that show signs of cracking, distortion, or corrosion in load-bearing or precision fixture applications.