ASME B18.22.1 Plain Washer | Flat Washer Standard | GFM-WCR System
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ASME B18.22.1 is the primary American national standard for plain, flat washers in the inch series. It defines the dimensional requirements and tolerances for washers intended for general industrial use, providing critical surface protection and load distribution for North American engineering specifications.
The standard distinguishes between Type A (precision-stamped for high performance) and Type B (general-purpose commercial grade), categorized into Narrow (N), Regular (R), and Wide (W) series to accommodate varying clearance and bearing surface requirements.
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ASME B18.22.1 washers are engineered for compatibility with American fastener sizes. Type A washers feature tighter tolerances on inner and outer diameters, making them ideal for high-stress aerospace and automotive applications. Type B washers offer more flexibility in general construction and machinery, available in multiple width series (Narrow/Wide) to fit specific design constraints.
- ASME B18.22.1 = Plain Washers (Inch Series)
- ANSI/ASME B18.22.1 = American National Standard for Flat Washer Systems
| Parameter | Value |
|---|---|
| Standar | ASME B18.22.1 |
| Series | Inch Series (Type A / Type B) |
| Width Options | Narrow (N), Regular (R), Wide (W) |
| Bahan | Carbon Steel, Stainless, Brass, Aluminum |
| Size Range | #0 (0.060") to 3.000" Nominal |
- North American oil, gas, and petrochemical infrastructure
- Heavy automotive and truck manufacturing (ANSI/SAE)
- U.S. standard agricultural and construction equipment
- Consumer appliances and structural steel projects (USS)
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- ✔ Hardened Type A High-Stress Washers in stock
- ✔ Commercial Type B Wide/Narrow series available
- ✔ Finishes: Clear/Yellow Zinc, Black Oxide, HDG, Cadmium
- ✔ Full material certification (MTR) provided upon request
- ✔ Specialized dies for exact ASME dimensional compliance across Narrow and Wide series
- ✔ Material traceability from raw steel coil to finished product
- ✔ Advanced plating lines for high-salt-spray resistance (HDG/Dacromet)
- ✔ Efficient global export from Handan, ensuring timely delivery for U.S. and Middle East projects
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