USS Flat Washers, 5/16In, 100 Pack, Zinc

Description

Outside Diameter	0.75 inches
Fastener Size	5/16"
Item Thickness	0.1 inches
Size Name	5/16"
Item Weight	14.08 ounces
Number of Pieces	100
Item Dimensions	3.1 x 2 x 3.1 inches
Compatible Groove Diameter	0.38 inches
Material Type	Steel
Exterior Finish	Zinc
Metal Type	Alloy Steel
Finish Types	Zinc
Washer Type	Flat
Washer Compatibility	5/16 inch bolts, 5/16 inch screws
Washer Application	construction, repair
Screw Head Style	Flat
Thread Size	5/16"
Fastener Type	Flat Washer
Warranty Description	Warranty
Manufacturer	The Group
Unit Count	1 Count
Item Highlight	Zinc-plated steel, USS fit for 5/16in bolts and screws, Helps spread load in deck, fence, repair, and hardware projects
Global Trade Identification Number	00008236089349
Included Components	The Group 270058 Flat Zinc Washer, 5/16-Inch, 100-Pack
Item Type Name	The Group 270058 Flat Zinc Washer, 5/16-Inch, 100-Pack
Model	270058
Number Of Items	100
Part Number	270058
Set Name	100-Pack
Color	Zinc Plated
Material	Steel

Product Description

Hillman 5/16" zinc USS flat washers are designed to improve fastening stability by distributing the load of bolts and screws across a wider surface area. These washers help protect materials from damage while supporting stronger and more secure fastening connections. Engineered to USS standards, these washers are specifically sized for use with 5/16" USS threaded bolts and screws. Flat washers are commonly used in construction, repair, mechanical assembly, and general hardware installations where added fastening security and pressure distribution are required. Constructed from durable steel and finished with protective zinc plating, these washers provide moderate resistance to rust and corrosion for interior applications. Packaged in a convenient C-Pak containing 100 pieces, these washers are ideal for contractors, maintenance work, and home improvement projects requiring dependable fastening support.

From the Manufacturer

Used in applications with nuts and bolts. The flat washer provides a greater bearing surface which helps prevent a nut or bolt head from tearing through the material. Flat washers are commonly used in decks and fence building. The called out size is the inner diameter of the washer.

• ZINC-PLATED FLAT WASHERS FOR SECURE FASTENER SUPPORT: 5/16 in. flat washers distribute bolt and screw load across a wider surface area, preventing material damage and improving fastening stability in construction and repair projects.
• STANDARD SIZED FOR 5/16 IN. BOLTS AND SCREWS: Engineered to standard flat washer sizing for proper compatibility with 5/16 in. threaded bolts and screws. Precise sizing ensures accurate alignment and reliable structural fastening.
• IMPROVES HOLDING POWER AND LOAD DISTRIBUTION: Flat washers increase pressure distribution from bolts and screws, reducing the likelihood of loosening and improving overall fastening security for stronger connections across multiple materials.
• ZINC-PLATED STEEL FOR CORROSION RESISTANCE: Durable steel with zinc plating provides moderate rust protection for interior and general-purpose environments. Reliable performance in hardware assembly, repair, and construction projects.
• TRUSTED HILLMAN FASTENING SOLUTIONS: Hillman hardware products are engineered for consistent quality, dependable performance, and reliable fastening across construction, repair, and home improvement project applications.