Bowmalloy 500009 Uss Flat Washer 1 Inch Carbon Steel

Product Description

The BOWMALLOY 500009 is a 1-inch USS flat washer manufactured from Grade 8 carbon steel with a yellow zinc chromate finish. USS flat washers provide a larger bearing surface than standard washers, distributing clamp load across a wider area to protect the mating surface and reduce fastener pull-through. This washer measures 1.0910 inches inside diameter and 2.5000 inches outside diameter, with a thickness of 0.1400 inches. It meets ASTM F436 fastener standards, making it appropriate for structural and heavy-duty bolted connections. Plumbers, electricians, millwrights, and general trade mechanics use these washers in equipment mounting, piping supports, and structural assemblies.

This washer is suited for use in residential and commercial construction, mechanical rooms, equipment pads, and utility installations where a corrosion-resistant, large-bearing-surface fastener component is needed. The yellow zinc chromate finish provides moderate corrosion resistance for indoor and sheltered outdoor applications. Typical use cases include pipe hanger assemblies, HVAC equipment bases, panel mounting, and general structural bolting requiring a Grade 8 carbon steel washer in the 1-inch screw size range.

Key Features

• USS washer profile provides a wider bearing surface compared to standard SAE washers
• Grade 8 carbon steel construction for high-strength bolted joint applications
• Yellow zinc chromate finish offers corrosion resistance in moderate exposure environments
• Meets ASTM F436 fastener standard for structural washer applications
• 1.0910-inch inside diameter sized for 1-inch fasteners with proper clearance
• 2.5000-inch outside diameter distributes load across a larger surface area

Compatibility

Designed for use with 1-inch screw or bolt sizes in USS flat washer applications conforming to ASTM F436 requirements. Suitable for Grade 8 carbon steel bolted assemblies in inch-measurement systems.

Installation Notes

Installation is performed by any trade professional working with structural or mechanical fastener assemblies. Always ensure the bolt, nut, and washer grades are matched appropriately for the joint specification. De-energize electrical equipment and relieve system pressure before accessing any fastened components in live mechanical or electrical systems. Consult applicable codes such as the NEC or IPC for fastener and support requirements specific to your installation type.