Gibraltar 42627G Standard Flat Washer 1 in Case Hardened

Product Description

The GIBRALTAR 42627G is a standard flat washer engineered for use with 1-inch screw fasteners. Manufactured from case-hardened 1010 steel with a black oxide finish, this washer distributes load across a bearing surface to reduce fastener pull-through and surface damage. The black oxide coating provides moderate corrosion resistance and a consistent dark appearance suited to industrial and structural applications. With an inside diameter of 1-1/32 inches and an outside diameter of 2 inches, it meets standard dimensional requirements for inch-system fastener assemblies. Licensed tradespeople and maintenance professionals working with structural connections, mechanical assemblies, or equipment mounting will find this a straightforward, code-compatible hardware component.

This washer is appropriate for use in general industrial maintenance, equipment installation, structural fastening, and mechanical assembly applications where a standard-series flat washer is specified. It is suited to both interior and protected exterior environments where mild corrosion resistance from the black oxide finish is adequate. HVAC equipment mounting, electrical panel anchoring, plumbing fixture support, and similar trade installations represent common use scenarios.

Key Features

• Case-hardened 1010 steel construction for increased surface hardness and load resistance
• Black oxide finish for mild corrosion resistance and reduced light reflection
• 1-1/32 inch inside diameter fits 1-inch nominal screw fasteners
• 2-inch outside diameter provides broad load distribution
• 9/32 inch thickness for standard-series dimensional compliance
• Inch measurement system — compatible with standard SAE fastener specifications

Compatibility

Designed as a standard flat washer for use with 1-inch nominal screw fasteners in inch-system assemblies per standard washer series dimensional requirements.

Installation Notes

Installation requires no specialized tooling beyond the fastener drive appropriate to the mating screw. Always verify that washer inside diameter, outside diameter, and thickness match the joint design requirements before assembly. In structural or load-bearing applications, follow the applicable building code or equipment manufacturer torque specifications for the mating fastener. Black oxide finish is not a substitute for plated or stainless fastener hardware in high-moisture or outdoor-exposed environments.