Gibraltar 63603G M10 Flat Washer Case Hardened Steel

Product Description

The GIBRALTAR 63603G is a metric standard flat washer manufactured from case-hardened 1010 steel with a black oxide finish. It is designed for use with M10 fasteners and serves to distribute clamp load, reduce surface damage, and prevent fastener pull-through in bolted assemblies. The washer measures 11mm inside diameter, 22mm outside diameter, and 3mm thick. The black oxide finish provides moderate corrosion resistance and reduces light reflection in finished assemblies. This washer is sold individually but must be ordered in multiples of 10.

This flat washer is suited for general mechanical assembly, fabrication, and maintenance applications across industrial, commercial, and trade environments. Common install scenarios include structural connections, equipment mounting, and hardware replacement where M10 metric fasteners are specified. It is appropriate for use in steel-to-steel contact applications where case-hardened material is required to resist embedment under load.

Key Features

• Case-hardened 1010 steel construction resists deformation under clamp load
• Black oxide finish for mild corrosion resistance and low-reflectivity appearance
• Standard metric dimensions: 11mm ID x 22mm OD x 3mm thick
• Designed for M10 screw size fasteners
• Metric measurement system for compatibility with metric fastener specifications

Compatibility

Designed as a standard metric flat washer for use with M10 fasteners in general mechanical and structural assembly applications.

Installation Notes

Installation is performed by any trade or technician working with metric fastener assemblies. Ensure mating surfaces are clean and free of debris before seating the washer. Use appropriate torque specifications for the fastener grade and joint material as defined by project engineering requirements. The black oxide finish is not a heavy corrosion barrier — apply supplemental coating or sealant if the assembly will see prolonged moisture exposure.