Bowmalloy 500120 Sae Flat Washer 3/4 in Carbon Steel

Product Description

The BOWMALLOY 500120 is a 3/4 inch screw size SAE flat washer manufactured from Grade 8 carbon steel with a yellow zinc chromate finish. It meets ASTM F436 fastener standards, making it suitable for structural and high-load bolted connections. The washer measures 0.7750 inches inside diameter and 1.4680 inches outside diameter, with a thickness of 0.1400 inches. The yellow zinc chromate coating provides corrosion resistance in moderate-exposure environments. Licensed contractors and tradespeople working with structural steel connections, HVAC equipment mounting, and mechanical assemblies commonly specify this washer where a load-distributing SAE profile and verified material grade are required.

This washer is used in residential and commercial applications where a 3/4 inch fastener needs a broad bearing surface to distribute clamping load. Common install scenarios include equipment base mounting, structural steel bolted joints, and mechanical panel assemblies. The SAE profile provides a wider outside diameter than USS flat washers of the same screw size, offering greater load distribution on softer substrate materials. Grade 8 carbon steel construction supports use in high-tension fastener assemblies.

Key Features

• Grade 8 carbon steel construction for high-strength fastener assemblies
• Yellow zinc chromate finish provides moderate corrosion resistance
• Meets ASTM F436 fastener standard
• SAE profile with 1.4680 inch outside diameter for broad load distribution
• 0.1400 inch thickness for consistent clamping under torque
• Inside diameter of 0.7750 inches fits 3/4 inch screw size hardware

Compatibility

Designed as an OEM-style replacement or new-install flat washer for 3/4 inch screw size bolted assemblies requiring SAE dimensions per ASTM F436.

Installation Notes

Installation is performed by licensed tradespeople or qualified mechanics working on structural or mechanical bolted assemblies. Always de-energize and lockout equipment before working on any fastened assembly under load. Inspect the washer seating surface for burrs or debris before torquing. Follow applicable code requirements, including AISC or equipment manufacturer torque specifications, as no specific torque value is assigned to the washer itself.