Metric Blue UST202005 M8 Standard Flat Washer

Product Description

The METRIC BLUE UST202005 is an M8 standard flat washer manufactured from alloy steel, designed to distribute load and reduce surface damage under bolt heads and nuts in metric fastener assemblies. With an inside diameter of 0.367 inches (9.32 mm), an outside diameter of 0.699 inches (17.75 mm), and a thickness of 0.118 inches (3.00 mm), this washer meets the dimensional and mechanical requirements of ASTM F436 and ASTM F606M. It is a standard metric washer suited for use in structural, mechanical, and equipment assembly applications where consistent clamping and load distribution are required.

This washer is used in metric fastener assemblies across residential construction, commercial mechanical systems, HVAC equipment mounting, and general industrial fabrication. It pairs with M8 bolts and screws in steel-to-steel and steel-to-substrate connections. The alloy steel construction makes it appropriate for applications that require greater hardness and tensile strength compared to plain steel alternatives. Licensed tradespeople and field technicians working with metric hardware will find this washer compliant with commonly referenced ASTM standards for structural fastener applications.

Key Features

• Alloy steel construction provides higher hardness and strength relative to low-carbon steel washers
• Inside diameter of 0.367 inches (9.32 mm) fits M8 fasteners
• Outside diameter of 0.699 inches (17.75 mm) for effective load distribution
• Thickness of 0.118 inches (3.00 mm) maintains consistent bearing surface
• Meets ASTM F436 and ASTM F606M fastener standards
• Metric system of measurement for use with M8 screw and bolt assemblies

Compatibility

Designed as an OEM-style replacement or direct-use standard flat washer for M8 metric fastener assemblies requiring ASTM F436 or ASTM F606M compliance.

Installation Notes

Installation is performed by mechanics, ironworkers, HVAC technicians, or any trade professional working with metric fastener assemblies. Ensure the mating bolt, nut, and substrate are compatible with M8 metric hardware before installation. De-energize and lock out any equipment before servicing fastener connections on mechanical or electrical systems. Do not substitute this washer in applications requiring a different washer standard or nominal screw size.