Bowmalloy BOW500213 Sae Flat Washer 1/4 in Steel 500 Pk

Product Description

The BOWMALLOY BOW500213 is an SAE flat washer designed for 1/4 inch screw applications in structural and mechanical fastening work. Manufactured from steel with a Bowma-Guard finish, this washer meets ASTM F436 requirements and carries a Rockwell C38-42 hardness rating, making it suited for load-bearing connections where surface protection and consistent clamping performance matter. The inside diameter measures 0.2710 inches, the outside diameter measures 0.6250 inches, and the thickness is 0.0730 inches. Each package contains 500 washers. Installers working in HVAC, plumbing, electrical, and general mechanical trades will find this a reliable, code-compliant hardware component for everyday fastening tasks.

This washer is used wherever a 1/4 inch fastener requires a broad bearing surface to distribute load and prevent pull-through or surface damage. Typical applications include equipment mounting, pipe support hardware, panel attachment, and structural connections in both residential and light commercial settings. The SAE washer geometry provides a larger outer diameter relative to the screw size compared to USS narrow-series washers, giving more contact area per fastener.

Key Features

• SAE washer type per ASTM F436 fastener standard
• Steel construction with Bowma-Guard finish for surface protection
• Rockwell C38-42 hardness for reliable load distribution
• Inside diameter of 0.2710 inches fits 1/4 inch screw shanks
• Outside diameter of 0.6250 inches provides broad bearing surface
• Sold in a 500-piece package for high-volume trade use

Compatibility

Designed as an OEM-style replacement and general-use SAE flat washer for 1/4 inch screw and bolt assemblies in mechanical, structural, and trade fastening applications.

Installation Notes

Install using standard hand tools or impact drivers rated for 1/4 inch fastener assemblies. Power down or de-energize any equipment before accessing fastener points on electrical or HVAC panels. Ensure mating surfaces are clean and free of debris before seating the washer to maintain proper clamp load. Follow applicable codes including NEC, IFGC, or IPC as relevant to the specific installation context.