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High-Quality Flat Washers


High-Quality Custom & Standard Flat Washers

What is a Flat Washer?

A flat washer is a fundamental, circular fastener featuring a precision-machined center hole, engineered to flawlessly accommodate a massive variety of general, commercial, and heavy-duty fastening applications. Manufactured from premium, industrial-grade materials, these highly versatile washers are absolutely essential for maintaining structural integrity, providing a secure foundation, and preventing damage to mating surfaces during final assembly.

Mechanical Advantages and Common Applications

Because they are specifically designed to expertly support the fastener under heavy tension, flat washers provide several critical mechanical benefits across all industries:

  • Increased Bearing Surface: By significantly expanding the bearing surface area beneath a nut or bolt head, they actively spread the extreme clamping force over a much wider area, preventing material fatigue and localized stress concentrations.
  • Soft Material Protection: They are highly effective and frequently utilized when the mating materials are soft, thin, or easily crushed. The flat washer acts as a protective barrier, ensuring the tightening fastener does not bite into or dangerously damage the substrate.
  • Irregular Hole Compensation: Flat washers provide a critical bridge of structural support when fastening components with oversized, irregularly shaped, or slightly misaligned clearance holes, ensuring a secure and perfectly flush fit every time.

Request a Quote Today

Have a question about our massive inventory of flat washers or need help determining the correct outer diameter for your oversized clearance holes? Contact our team by using our secure online form to submit your project details. You can also give us a call today to speak directly with our fastener specialists. We look forward to speaking with you!

Types of Flat Washers


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SKU NAME DETAILS
WFSS827 1.062ID 2.50OD .192-.136 THICK 18-8 STAINLESS STEEL FLAT WASHER # 827
WFSS841 .188ID .438OD .065-.036 THICK 18-8 STAINLESS STEEL FLAT WASHER # 841
WFSS842 .219ID .50OD .065-.036 THICK 18-8 STAINLESS STEEL FLAT WASHER # 842
WF3S002 #2 316 STAINLESS STEEL FLAT WASHER
WF3S003 #3 316 STAINLESS STEEL FLAT WASHER
WF3S004 #4 316 STAINLESS STEEL FLAT WASHER
WF3S005 #6 316 STAINLESS STEEL FLAT WASHER
WF3S008 #8 316 STAINLESS STEEL FLAT WASHER
WF3S010 #10 316 STAINLESS STEEL FLAT WASHER
WF3S012 #12 316 STAINLESS STEEL FLAT WASHER
WFSIBRO#2S .099ID .187OD .020 THICK SILCON BRONZE FLAT WASHER
WFSIBRO#3 .101ID .250OD .020 THICK SILCON BRONZE FLAT WASHER
WFSIBRO#4 .120ID .281OD .025 THICK SILCON BRONZE FLAT WASHER
WFSIBRO#5 .133ID .281OD .025 THICK SILCON BRONZE FLAT WASHER
WFSIBRO#6S .147ID .312OD .032 THICK SILCON BRONZE FLAT WASHER
WFSIBRO#6L .147ID .375OD .032 THICK SILCON BRONZE FLAT WASHER
WFSIBRO#8S .172ID .375OD .032 THICK SILCON BRONZE FLAT WASHER
WFSIBRO#8L .172ID .437OD .036 THICK SILCON BRONZE FLAT WASHER
WFSIBRO#10S .200ID .437OD .036 THICK SILCON BRONZE FLAT WASHER
WFSIBRO#10L .200ID .500OD .040 THICK SILCON BRONZE FLAT WASHER
WFSIBRO#12S .228ID .500OD .040 THICK SILCON BRONZE FLAT WASHER
WFSIBRO#12L .228ID .562OD .040 THICK SILCON BRONZE FLAT WASHER