These high-strength USS Flat Washers feature the industrial-preferred wider outer diameter for maximum load distribution and spanning oversized holes, crucial for heavy machinery and construction. Proudly Made in the USA and forged from Medium Carbon Steel (ee.g., AISI 1035/1050), they are Through Hardened to a typical hardness of HRC 38-45. This hardening process guarantees high compressive strength, preventing brinelling under the tightest torque applications. Coated with a traditional Yellow Zinc Chromate (CR+6) finish for excellent, time-tested corrosion and abrasion resistance, providing a distinct appearance and long service life. Designed to meet ASME B18.21.1 Type A Wide dimensional standards. Choose domestic quality for dependable, high-tension fastening.
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