Gibraltar 42609G Standard Flat Washer 1 in Case Hardened Steel

Product Description

The GIBRALTAR 42609G is a standard flat washer designed for 1-inch screw applications. It is manufactured from case-hardened 1010 steel with a black oxide finish that provides mild corrosion resistance and a uniform dark appearance. The washer measures 1-1/32 inches inner diameter, 2 inches outer diameter, and 3/16 inches thick. These washers are used to distribute fastener load across a bearing surface, reduce friction, and prevent pull-through in bolted assemblies. Mechanical contractors, pipefitters, electricians, and general tradespeople install these in structural, equipment-mounting, and panel-fastening applications.

This flat washer is suited for general-purpose fastening tasks in residential and light commercial construction, mechanical equipment installations, and utility enclosures. The case-hardened construction provides added surface hardness for durability under load. The black oxide finish is compatible with a range of painted, primed, or bare metal surfaces. Typical applications include securing junction box covers, equipment bases, strut assemblies, and structural brackets where a 1-inch fastener is used.

Key Features

• Screw size: 1 inch for broad compatibility with standard heavy-fastener assemblies
• Case-hardened 1010 steel construction for surface hardness and load resistance
• Black oxide finish for mild corrosion resistance and reduced light reflection
• 1-1/32 inch inner diameter allows flush seating on 1-inch fastener shafts
• 2-inch outer diameter distributes clamping load over a wide bearing surface
• 3/16 inch thickness adds rigidity under high-clamp-load conditions

Compatibility

Designed as a standard-duty replacement or add-on flat washer for use with 1-inch diameter bolts, screws, and threaded rod in general mechanical and construction assemblies.

Installation Notes

Installation does not require specialized tools beyond a standard wrench or socket set sized for the mating fastener. Ensure the bearing surface is clean and free of debris before seating the washer to prevent uneven load distribution. Follow applicable torque guidelines specified by the fastener manufacturer or applicable structural codes. Do not substitute this washer in applications requiring hardened or load-indicating washers where those are specifically required by design.