Hillman Fasteners 811070 Galvanized Flat Washer 1/4 in 100 Pack

Product Description

The HILLMAN FASTENERS 811070 is a galvanized flat washer sized for 1/4-inch fasteners, supplied in a 100-piece pack. Following the USS wide-pattern standard, this washer features a larger outer diameter than standard flat washers, distributing clamping load over a greater surface area and reducing the chance of pull-through on softer materials. The hot-dip galvanized finish provides corrosion resistance suited to outdoor, wet, or exposed installations. Trade professionals in plumbing, HVAC, electrical, and general construction rely on this type of washer when working with bolted connections in corrosive or high-moisture environments.

This washer is appropriate for use in residential and light commercial construction, mechanical room installations, equipment mounting, and structural fastening applications where a 1/4-inch bolt or threaded rod is used. The wide USS pattern makes it a practical choice when fastening through oversized holes, wood framing, sheet metal flanges, or soft substrates that require broader load distribution.

Key Features

• USS wide pattern provides larger outer diameter for increased load distribution compared to SAE standard washers
• Galvanized finish resists corrosion in wet, outdoor, and high-humidity environments
• Sized for 1/4-inch fasteners for broad compatibility with standard bolts, screws, and threaded rod
• 100-piece pack quantity suitable for job-site or shop stocking
• Flat washer profile fits flush against mating surfaces without interference

Compatibility

Designed as a USS wide-pattern flat washer for use with standard 1/4-inch bolts, hex cap screws, carriage bolts, and threaded rod in general mechanical and construction fastening applications.

Installation Notes

Licensed trades and general contractors install flat washers as part of bolted connections during equipment mounting, structural assembly, and pipe or conduit support work. Always power down or de-energize any electrical equipment and shut off fluid systems before working on fastened connections in those systems. Use appropriate wrenches or nut drivers to achieve firm, even clamping without over-torquing fasteners into soft substrates. Verify that the galvanized finish is acceptable for the installation environment, as some applications may require stainless steel or other coatings.