Boker's Washers & Stampings

Square Washers from Boker’s Help Secure Fastening in Tight Spaces

Click image for high-res version.

Minneapolis, MN – February 5, 2020 – Boker’s, Inc. a leading manufacturer of precision metal stampings, washers, spacers and shims, offers complete production of non-standard and customized square and rectangular washers and spacers designed to provide secure fastening, turn resistance and load distribution—even in the tightest clearances. Boker’s square and rectangular washers are available in a wide range of materials, bolt and I.D. sizes, in O.D. sizes up to 12” x 12” (30.5 cm x 30.5 cm), and in thicknesses ranging from .005” to .190” (.127 mm to 4.8 mm).

“Like round washers, square washers are often used to distribute torque loads in secure fastening applications,” said Chuck Kersey, Assistant Sales Manager. “But precision stamped square and rectangular washers offer the added advantage of being able to work in more restricted spaces and can be used to provide edge-to-edge contact to resist turning.” These products extend into many designs, from slotted hole square plate washers, to those with rounded outside corners. Kersey added that in general, square washers offer excellent fastening friction, and provide reliable connection security in crevice, channel and Unistrut-style applications.

In addition, square washers are also widely used as shims, separating the bolt crown from what is being anchored, reducing the possibilities of deformity when tightening, and helping to keep joining surfaces undamaged. This bushing or packing approach is often used in the construction industry or in applications to act as a force-countering support in fastener rods and complex part profiles.

Square and rectangular washers are often emerging as a higher-performance alternative to round washers in a diverse array of applications subject to vibration forces, ranging from industrial machinery to aerospace, from washing machines to automobiles. By effectively expanding the diameter of the bolt’s head, square washers offer greater dispersal of load and turning resistance in many applications, helping maintain fastening integrity, and protecting and prolonging the life of connected parts.

Boker’s square and rectangular washers are custom produced to order in short, medium and long runs with fast delivery and minimal tool cost, with available 3D prototypes. Options in more that 2,000 commonly specified and difficult-to-find materials are available, including metallic and non-metallic materials. Metallic material selections include low-carbon sheet steel, various spring steels, stainless steel, aluminum, brass, copper and a range of non-metallic material options. Available metal finishes include black oxide, nickel, zinc and others. 

For your application specific quote please submit your specifications by using our fast quote form.

To learn more about the design possibilities and manufacturing standards of Boker’s square washers, visit

Company Info:
Boker’s, Inc.
3104 Snelling Ave
Minneapolis, MN 55406

About Boker’s
Boker’s, Inc. maintains a Quality Management System that is AS 9100:2016 and ISO 9001:2015 certified and is a woman-owned manufacturer of precision stampings and non-standard washers and spacers. To request a complimentary copy of Boker’s 2020 Stampings & Washers Catalog, contact: Boker’s, Inc., 3104 Snelling Avenue, Minneapolis, MN 55406-1937; call 612-729-9365 or (TOLL-FREE) 800-927-4377 or visit