Hillman Fasteners 830504 Flat Washer 5/16 in 100 Pack

Product Description

The HILLMAN FASTENERS 830504 is a stainless steel commercial flat washer designed to distribute fastener load across a surface and prevent pull-through, surface damage, and corrosion. Sized at 5/16 inches, these washers meet commercial-grade dimensional standards for use in bolted connections across a wide range of trade applications. Sold in a 100-count pack, this SKU is stocked for job-site or shop use where consistent fastener hardware is required. Stainless steel construction provides corrosion resistance suitable for wet, outdoor, or chemically exposed environments.

These flat washers are appropriate for residential and light commercial construction, plumbing support assemblies, HVAC equipment mounting, electrical enclosure hardware, and general mechanical fastening. The 5/16-inch inner diameter is sized to pair with 5/16-inch bolts and threaded rod. Installers in multiple trades stock this size as a standard consumable for bracketing, strut work, and equipment attachment.

Key Features

• Stainless steel construction resists corrosion in wet and outdoor environments
• Commercial flat washer profile meets standard dimensional tolerances for load distribution
• 5/16-inch inner diameter fits 5/16-inch fasteners
• 100-count pack reduces per-unit cost for high-volume jobs
• Suitable for use across HVAC, plumbing, electrical, and general mechanical applications

Compatibility

Designed for use with 5/16-inch bolts, screws, and threaded rod in standard commercial fastening applications.

Installation Notes

Install using standard hand tools or a socket wrench appropriate for the mating fastener. Place the flat washer between the fastener head or nut and the work surface to distribute clamping load. Stainless steel washers should be paired with stainless fasteners where possible to prevent galvanic corrosion in dissimilar-metal contact points. No special torque values are required beyond those specified for the mating fastener and application.