National Bolt & Nut Corporation
National Bolt & Nut Corporation
125 E. Commerce Drive
Schaumburg, IL 60173
Toll Free: 888.307.8811
Phone: 630.307.8800
Fax: 630.307.8870
Email: info@nationalbolt.com
Website: www.nationalbolt.com
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  • One of the most common types of flat washers, National Bolt & Nut’s Type A wide series USS flat washers possess a flat bearing surface underneath the fastener that more evenly distributes pressure. Designed to meet most industrial applications, ranging from maintenance to manufacturing and repair, USS flat washers help prevent a nut, bolt, or screw from pulling through the material. Our USS flat washers meet ANSI B18.22.1 dimensional specifications.
  • Other materials and finishes available. For further information, call or send an information request.
SAE Flat Washers
Unit of Measure
1 2 3 4 

Item #

Size

Finish

Custom N/A Custom N/A Custom
pn-12284 N/A 3/16 in N/A Plain
pn-12285 N/A 1/4 in N/A Plain
pn-12286 N/A 5/16 in N/A Plain
pn-12287 N/A 3/8 in N/A Plain
pn-12288 N/A 7/16 in N/A Plain
pn-12289 N/A 1/2 in N/A Plain
pn-12290 N/A 9/16 in N/A Plain
pn-12291 N/A 5/8 in N/A Plain
pn-12292 N/A 3/4 in N/A Plain
pn-12293 N/A 7/8 in N/A Plain
pn-12294 N/A 1 in N/A Plain
pn-12295 N/A 1 1/8 in N/A Plain
pn-12296 N/A 1 1/4 in N/A Plain
pn-12297 N/A 1 3/8 in N/A Plain
pn-12298 N/A 1 1/2 in N/A Plain
pn-12299 N/A 1 5/8 in N/A Plain
pn-12300 N/A 1 3/4 in N/A Plain
pn-12301 N/A 1 7/8 in N/A Plain
pn-12302 N/A 2 in N/A Plain
pn-12303 N/A 2 1/4 in N/A Plain
pn-12304 N/A 2 1/2 in N/A Plain
pn-12305 N/A 2 3/4 in N/A Plain
pn-12306 N/A 3 in N/A Plain
pn-12307 N/A 3/16 in N/A Zinc/Clear
Unit of Measure
1 2 3 4