Gibraltar 42626G Standard Flat Washer 7/8 in Case Hardened

Product Description

The GIBRALTAR 42626G is a standard flat washer designed for 7/8 inch screw applications. Made from case-hardened 1010 steel with a black oxide finish, it provides load distribution and surface protection under fastener heads or nuts. The black oxide coating offers mild corrosion resistance and reduces light reflection, making it suitable for indoor mechanical and structural assemblies. With a 29/32 inch inside diameter, 1-3/4 inch outside diameter, and 1/4 inch thickness, this washer meets standard dimensional requirements for general-purpose fastening tasks. It is installed by mechanics, millwrights, electricians, and general contractors across a range of trade applications.

This flat washer is suited for residential and commercial construction, mechanical equipment assembly, and maintenance work where a 7/8 inch fastener is used. It fits under bolt heads and nuts to spread clamping load across a wider surface area, reducing the risk of material damage or fastener pull-through. The inch-measurement sizing follows standard ANSI conventions, making it a common replacement or stock item in service and maintenance operations.

Key Features

• Case-hardened 1010 steel construction for strength and wear resistance
• Black oxide finish provides mild corrosion resistance and a low-reflectance appearance
• 29/32 inch inside diameter fits 7/8 inch screw or bolt shank
• 1-3/4 inch outside diameter distributes load across a wider bearing surface
• 1/4 inch thickness for standard flat washer applications
• Inch measurement system — compatible with standard ANSI fastener sizing

Compatibility

Designed as a standard flat washer for use with 7/8 inch screws and bolts in general mechanical, structural, and trade fastening applications.

Installation Notes

Install between the fastener head or nut and the mating surface to distribute clamping load. Ensure the washer bore is properly aligned with the fastener before tightening. Use with appropriately rated fasteners for the application load requirements. Follow applicable mechanical codes and torque guidelines specified by the fastener or equipment manufacturer.