Te-co 42603 Standard Flat Washer 3/8 in Steel Black Oxide

Product Description

The TE-CO 42603 is a standard flat washer designed for use with 3/8 inch screws. Manufactured from 1010 steel with a black oxide finish, this washer distributes load across a fastened joint and helps reduce surface damage under bolt or nut heads. The black oxide coating provides mild corrosion resistance and a uniform dark appearance suited to industrial and tooling applications. With an inside diameter of 13/32 inches (0.4063 inches), an outside diameter of 7/8 inches (0.8750 inches), and a thickness of 1/8 inch (0.1250 inches), the 42603 meets TCMAI standards and is sold by the piece in a minimum order quantity of 10 units.

This washer is suited for general mechanical assembly, fixturing, and tooling applications where a standard flat washer in inch measurements is required. It is commonly used in machine shops, production fixtures, and maintenance environments where black oxide steel hardware is specified. Licensed tradespeople and industrial maintenance technicians working on equipment assemblies, jigs, and fixtures will find this washer a straightforward, reliable component.

Key Features

• 1010 steel construction for consistent strength in general fastening applications
• Black oxide finish provides mild corrosion resistance and a clean, uniform appearance
• Inside diameter of 13/32 inches (0.4063 inches) fits 3/8 inch screws with standard clearance
• Outside diameter of 7/8 inches (0.8750 inches) for adequate load distribution
• Thickness of 1/8 inch (0.1250 inches) for standard flat washer profile
• Meets TCMAI standards for dimensional consistency

Compatibility

Designed as a standard flat washer for use with 3/8 inch screws in inch-measurement fastening applications.

Installation Notes

Install using standard hand tools appropriate for the fastener being used. Ensure mating surfaces are clean and free of debris before assembly. This is a mechanical fastener component and does not require specialized trade licensing to install, though proper torque procedures for the associated fastener should follow the applicable equipment or fixture specification.