Gibraltar 42600G Standard Flat Washer 3/16 in Case Hardened

Product Description

The GIBRALTAR 42600G is a standard flat washer designed for use with 3/16 inch screws. Manufactured from case-hardened 1010 steel with a black oxide finish, this washer distributes load evenly across fastened surfaces and helps resist corrosion in typical indoor and light-duty applications. It measures 13/64 inches inner diameter, 1/2 inch outer diameter, and 3/32 inch thickness. The black oxide coating provides a uniform dark appearance while offering mild surface protection. This washer is installed by maintenance technicians, mechanical contractors, HVAC installers, plumbers, and electricians wherever a standard inch-series flat washer is required in a fastener assembly.

This flat washer is suited for light to medium-duty fastening applications in residential and commercial settings. It is commonly used in equipment panels, mechanical enclosures, pipe hangers, electrical boxes, and general structural assemblies where a 3/16 inch fastener requires a bearing surface. The inch-series dimensioning makes it compatible with standard SAE and USS fastener hardware used across the trades. The black oxide finish makes it a practical choice where a finished appearance is preferred over bare steel.

Key Features

• Case-hardened 1010 steel construction for reliable load distribution
• Black oxide finish provides mild corrosion resistance and uniform dark appearance
• Sized for 3/16 inch screws with 13/64 inch inner diameter
• 1/2 inch outer diameter provides broad bearing surface relative to fastener size
• 3/32 inch thickness suits standard fastener stack-ups
• Inch-series dimensions compatible with common SAE hardware

Compatibility

Designed as a standard inch-series flat washer for use with 3/16 inch screw fasteners in general mechanical, HVAC, plumbing, and electrical assembly applications.

Installation Notes

Flat washers of this type are installed by hand prior to driving the fastener, and no special tools are required beyond those used for the fastener itself. Ensure the washer seats flush against the mating surface before torquing the fastener. In corrosive or wet environments, evaluate whether black oxide finish alone provides adequate protection for the application. Always follow applicable mechanical codes and equipment manufacturer guidelines when specifying hardware.