Gibraltar Z9422 C Washer 5/16 Inch Black Oxide Steel

Product Description

The GIBRALTAR Z9422 is a C washer designed for use with 5/16 inch bolts in mechanical fastening applications. Manufactured from case hardened 12L14 steel with a black oxide finish, this washer provides a reliable bearing surface and corrosion resistance in demanding environments. The open-slot C profile allows the washer to be installed or removed without fully disengaging the fastener, making it a practical choice for adjustable assemblies and maintenance-heavy installations. The black oxide treatment reduces surface reflectivity and offers moderate protection against oxidation. Each unit is sold individually.

This washer is suited for use in industrial maintenance, mechanical assembly, and equipment service applications where quick washer positioning is required. The C washer profile is commonly found in shaft collar assemblies, conveyor systems, and general machine maintenance. Trades working with mechanical systems, including HVAC equipment mounting and plumbing support hardware, will find this fastener component useful in bracket and clamp applications where bolt disassembly is not practical.

Key Features

• Open-slot C profile allows installation without removing the bolt
• Case hardened 12L14 steel construction for strength and durability
• Black oxide finish for moderate corrosion resistance and low reflectivity
• 11/32 inch inside diameter fits standard 5/16 inch bolts
• 1-1/4 inch outside diameter provides a broad bearing surface
• 5/16 inch thickness adds substantial load distribution

Compatibility

Designed as an OEM-style replacement or service component for 5/16 inch bolt fastening assemblies requiring a C washer profile.

Installation Notes

Installation and removal of C washers should be performed with all moving equipment at a full stop and, where applicable, with power disconnected and locked out per OSHA lockout/tagout procedures. The open slot should be oriented away from primary load-bearing direction where possible to maintain washer position under vibration. Use appropriate hand tools and ensure the mating bolt and nut are not over-torqued, as case hardened washers can crack under excessive point loads.