Hillman Fasteners 280058 Sae Flat Washer 5/16 in 100 Pack

Product Description

The HILLMAN FASTENERS 280058 is a 100-pack of 5/16-inch SAE flat washers manufactured from zinc plated steel. Flat washers distribute load across a fastener bearing surface, reducing the risk of pull-through and surface damage in bolted connections. The zinc plating provides a basic level of corrosion resistance suitable for general indoor and light outdoor applications. These washers conform to SAE dimensional standards, meaning the outer diameter, inner diameter, and thickness fall within the tolerances expected for 5/16-inch hardware. Plumbers, electricians, HVAC technicians, and general contractors keep SAE flat washers on hand as everyday fastening hardware for equipment mounting, bracket installation, and structural connections.

This pack is appropriate for residential and light commercial trade work where 5/16-inch fasteners are common. Typical applications include equipment base mounting, pipe hanger assemblies, electrical panel bracket work, and general mechanical connections. The 100-count quantity suits service vans and shop stock where bulk availability reduces downtime during installs and service calls.

Key Features

• SAE flat washer profile for standard load distribution on 5/16-inch fasteners
• Zinc plated steel construction for corrosion resistance in general-duty applications
• 100-pack quantity supports job-site and van stock replenishment
• Conforms to SAE dimensional tolerances for consistent fit across hardware

Compatibility

Designed as a standard SAE flat washer for use with 5/16-inch bolts, screws, and threaded rod in general mechanical and trade applications.

Installation Notes

Install flat washers between the fastener head or nut and the mating surface to distribute clamping load. Always confirm bolt grade and torque requirements are appropriate for the specific connection before final tightening. Follow applicable codes such as NEC or IFGC when washers are used as part of an electrical or gas equipment mounting assembly.