9/16 USS Flat Washer Med Carbon Through Hardened Zinc CR+3 Domestic USA - Package (100)
2472086
| Quantity | Unit Price |
|---|---|
| 1 to 23 | $100.60 |
| 24+ | $82.31 |
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- In stock
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9/16 USS Flat Washer Med Carbon Through Hardened Zinc CR+3 Domestic USA - Package (100), domestically manufactured in the USA, are constructed from medium carbon steel that is through hardened to meet the high mechanical requirements of Grade 8 and structural fastening applications, supporting joints with a minimum tensile strength of 180,000 PSI. Dimensions conform to ASME B18.21.1, Type A, Wide Series standards, which feature an oversized outside diameter for superior load distribution over large or slotted holes. They are finished with Yellow Zinc Plating (Chromate CR+3), a non-toxic and environmentally preferred trivalent chromium coating that provides good corrosion resistance and is RoHS compliant.
ID Size: 9/16 This product is a premium, domestically-sourced USS (United States Standard) flat washer designed for critical, high-load assemblies. The core material is medium carbon steel, which is subjected to a through-hardening process to achieve high mechanical strength, typically in the range of HRC 38–45, making it an ideal companion for high-strength fasteners like SAE J429 Grade 8 bolts. Dimensionally, the washers adhere to the ASME B18.21.1, Type A, Wide Series specification, characterized by a larger outside diameter compared to standard SAE washers, which is crucial for distributing the clamping force over a broader area and preventing material embedment or damage in softer substrates. The washer is coated with a Yellow Zinc (CR+3) finish. The CR+3 (trivalent chromium) chromate layer provides an identifiable yellow aesthetic while offering good corrosion protection and, most importantly, ensuring the fastener is free of the hazardous hexavalent chromium (CR+6), making it fully compliant with strict environmental directives such as RoHS. This combination of domestic manufacturing, high strength, and environmentally conscious plating makes it suitable for demanding industrial and structural applications.
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