Gibraltar 63621G M10 Flat Washer Case Hardened Steel

Product Description

The GIBRALTAR 63621G is a standard flat washer engineered for M10 screw applications in metric fastener assemblies. Manufactured from 1010 case-hardened steel with a black oxide finish, this washer distributes load evenly across the bearing surface to protect fastened materials and reduce fastener pull-through. It measures 11 millimeters inside diameter, 22 millimeters outside diameter, and 5 millimeters thick. The black oxide finish provides a baseline level of corrosion and abrasion resistance suited for general industrial, mechanical, and structural applications. Licensed tradespeople and maintenance technicians working with metric hardware will recognize this as a direct-specification component.

This washer is used in metric fastener assemblies across residential construction, commercial mechanical systems, industrial equipment, and general fabrication. It is well suited for use under bolt heads or nuts where a standardized bearing surface is required. Its case-hardened construction makes it appropriate for applications involving higher clamping loads where a softer washer would deform or embed into the mating surface.

Key Features

• M10 screw size compatibility with 11 mm inside diameter for accurate fit
• 22 mm outside diameter provides broad load-bearing surface area
• 5 mm thickness adds rigidity under high-clamp-load conditions
• 1010 case-hardened steel resists deformation under fastener torque
• Black oxide finish offers corrosion resistance and a low-reflectivity appearance
• Metric dimensioning conforms to standard M10 flat washer specifications

Compatibility

Designed as a standard flat washer for use with M10 metric fasteners in general industrial, mechanical, and construction assemblies.

Installation Notes

Install by placing the washer under the bolt head or nut before tightening to the fastener assembly specification. Power down or de-energize any associated equipment before servicing fastened assemblies on live mechanical or electrical systems. Use calibrated torque tools appropriate to the fastener grade and application. Follow applicable mechanical and structural codes for the specific installation environment.