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Flat Washers

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Flat washers are essential components in any bolted assembly, serving to distribute fastener load across a wider area, protect mating surfaces from damage during tightening, and bridge gaps between fastener head sizes and clearance holes. Blue Ribbon Fastener stocks flat washers in SAE and USS sizes across low carbon steel, stainless steel (18-8 and 316), and zinc-plated finishes, providing a complete washer inventory for construction, manufacturing, MRO, and OEM applications. Same-day shipping is available on in-stock sizes.

Order by 2:30PM (CST) for same-day shipping! Repeat and volume customers, call or request a quote for the best possible pricing.
Fender
Fender
Fender, Extra Heavy
Fender, Extra Heavy
Machine Screw
Machine Screw
S.A.E.
S.A.E.
Standard
Standard
Thru-Hardened and Structural
Thru-Hardened and Structural
Type B
Type B
U.S.S. flat washers
U.S.S. flat washers

Usages for Flat Washers

Flat washers are used under bolt heads and nuts in virtually every type of fastened assembly to prevent surface damage and provide consistent load distribution. Key applications include structural steel connections, equipment mounting and machinery assembly, wood construction and framing, electrical enclosure and panel assembly, automotive and transportation manufacturing, and plumbing and mechanical systems. SAE washers have a smaller outer diameter for tight clearances, while USS washers have a larger OD for better load distribution in softer materials.

Flat Washers for all Industries

Flat washers are used across construction, manufacturing, MRO maintenance, OEM production, and virtually every industry that uses threaded fasteners. Contractors, maintenance technicians, OEM manufacturers, and tradespeople all rely on flat washers as a fundamental fastener component. Blue Ribbon Fastener supplies flat washers in the sizes, materials, and quantities needed by production buyers and project teams alike, with volume pricing for repeat customers and fast fulfillment for urgent needs.

Flat Washers Features for Engineers & Buyers:

  • Available in SAE (narrow OD) and USS (wide OD) dimensions
  • Carbon steel, zinc-plated carbon steel, 18-8 stainless, and 316 stainless finishes
  • Meets ASME B18.22.1 dimensional standards
  • Wide range of bolt sizes from #6 through 2" and metric equivalents
  • Bulk bags and box quantities available for production use
  • Compatible with all standard hex bolts, structural bolts, and machine screws
  • Same-day shipping on in-stock sizes when ordered by 2:30 PM CST
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