Gibraltar 42607G 3/4 in Flat Washer Black Oxide Steel

Product Description

The GIBRALTAR 42607G is a standard flat washer designed for use with 3/4 inch screws and bolts in structural, mechanical, and industrial fastening applications. Manufactured from case-hardened 1010 steel with a black oxide finish, this washer distributes clamp load evenly across the fastened surface and helps prevent fastener pull-through. The black oxide treatment provides a baseline level of corrosion resistance while maintaining tight dimensional tolerances. With an inside diameter of 25/32 inches, an outside diameter of 1-5/8 inches, and a thickness of 5/32 inches, this washer meets standard sizing for 3/4 inch fastener assemblies. It is suited for plumbing, HVAC, electrical, and general mechanical installations where durable, hardened hardware is specified.

This washer is appropriate for both residential and light commercial trade applications. It is commonly used in equipment mounting, pipe support assemblies, panel installations, and structural fastening where a hardened steel flat washer is required under bolt heads or nuts. The black oxide finish makes it a suitable choice in low-moisture interior environments. Trade installers across plumbing, HVAC, and electrical disciplines will encounter this washer in standard hardware assortments.

Key Features

• Case-hardened 1010 steel construction for increased surface hardness and load-bearing durability
• Black oxide finish provides mild corrosion resistance and a uniform dark appearance
• Standard flat washer profile distributes clamping force and protects mating surfaces
• Inside diameter of 25/32 inches fits standard 3/4 inch screw and bolt shanks
• Outside diameter of 1-5/8 inches and thickness of 5/32 inches meet common dimensional standards for this screw size

Compatibility

Designed as a standard flat washer for use with 3/4 inch screws and bolts in inch-measurement fastener assemblies across mechanical, plumbing, HVAC, and electrical installation work.

Installation Notes

Install by a qualified tradesperson as part of standard fastener assembly. Always de-energize or shut off relevant systems before working in electrical panels or mechanical equipment. Use appropriate hand tools and torque wrenches rated for the fastener grade in use. Verify that the washer material and finish are compatible with the service environment before installation in corrosive or outdoor conditions.