ASME/ANSI B18.21.1 Standard Helical Stainless Steel Spring-Lock Washers Supplier In China
Ningbo Teng Qi Fasteners Co., Ltd. is a reliable supplier of ASME/ANSI B18.21.1 Standard Helical Stainless Steel Spring-Lock Washers, specializing in the production of high-quality stainless steel fastening components with professional stamping capabilities. Our advanced stamping technology, precision molds, and experienced production team enable us to manufacture washers with consistent dimensions, uniform spring characteristics, and smooth surface quality. From raw material selection to finished product inspection, we strictly control every production step to ensure stable performance and dependable quality for global customers.
Different from ordinary washer suppliers, we focus not only on meeting standard requirements but also on providing flexible solutions for various application needs. We use premium stainless steel materials such as SUS304 and SUS316 to achieve excellent corrosion resistance and long service life, while our manufacturing process ensures reliable elasticity and accurate fitting with different fasteners. With strong production capacity, strict quality management, and customization support for sizes, packaging, and special requirements, our ASME/ANSI B18.21.1 Helical Stainless Steel Spring-Lock Washers are trusted by customers in industries including automotive, machinery, construction, electrical equipment, and industrial assembly.
Specification:
ASME/ANSI B18.21.1 Standard Helical Stainless Steel Spring-Lock Washers are manufactured according to the ASME/ANSI B18.21.1 specification and are designed to provide continuous spring force in bolted assemblies. These washers feature a helical split-ring structure that helps maintain tension between the fastener and the workpiece, improving resistance to loosening caused by vibration and dynamic loads. Manufactured from high-quality stainless steel materials such as SUS304 and SUS316, they offer excellent corrosion resistance, durability, and stable mechanical performance in various operating environments.
| Product name | ASME/ANSI B18.21.1 Standard Helical Stainless Steel Spring-Lock Washers |
|---|---|
| Inner Diamter: | Φ#4-Φ2“ |
| Material: | SS304 SS316 |
| Surface Treatment | Bright Pickling |
| Packaging: | Boxes/cartons into wooden pallets |
Dimension Chart of ASME/ANSI B18.21.1 Standard Helical Stainless Steel Spring-Lock Washers:
The dimension chart of ASME/ANSI B18.21.1 Standard Helical Stainless Steel Spring-Lock Washers provides detailed measurements, including washer inside diameter, outside diameter, thickness, free height, and corresponding fastener sizes. These standardized dimensions ensure accurate compatibility with bolts, screws, and nuts, allowing the spring-lock washers to generate proper tension and improve fastening reliability. By following ASME/ANSI B18.21.1 requirements, the washers maintain consistent geometry and performance across different sizes and applications.
| Mon | #4 | #5 | #6 | #8 | #10 | #12 | 1/4 | 5/16 | 3/8 | 7/16 | 1/2 | 9/16 | 5/8 | 3/4 | 7/8 | 1 | 1-1/8 | 1-1/4 | 1-3/8 | 1-1/2 | 1-5/8 | 1-3/4 | 1-7/8 | 2 |
| d max | 0.12 | 0.133 | 0.148 | 0.174 | 0.2 | 0.227 | 0.26 | 0.322 | 0.385 | 0.45 | 0.512 | 0.574 | 0.641 | 0.766 | 0.894 | 1.024 | 1.153 | 1.28 | 1.408 | 1.534 | 1.663 | 1.789 | 1.914 | 2.039 |
| d min | 0.114 | 0.127 | 0.141 | 0.167 | 0.193 | 0.22 | 0.252 | 0.314 | 0.377 | 0.44 | 0.502 | 0.564 | 0.628 | 0.753 | 0.878 | 1.003 | 1.129 | 1.254 | 1.379 | 1.504 | 1.633 | 1.758 | 1.883 | 2.008 |
| h min | 0.025 | 0.031 | 0.031 | 0.04 | 0.047 | 0.056 | 0.062 | 0.078 | 0.094 | 0.109 | 0.125 | 0.141 | 0.156 | 0.188 | 0.219 | 0.25 | 0.281 | 0.312 | 0.344 | 0.375 | 0.389 | 0.389 | 0.422 | 0.422 |
| b min | 0.04 | 0.047 | 0.047 | 0.055 | 0.062 | 0.07 | 0.109 | 0.125 | 0.141 | 0.156 | 0.171 | 0.188 | 0.203 | 0.234 | 0.266 | 0.297 | 0.328 | 0.359 | 0.391 | 0.422 | 0.424 | 0.424 | 0.427 | 0.427 |
- RELATED WASHER LISTS:
- DIN125 Flat Washer
- DIN127 Spring Lock Washer
- F436 Hardened Steel Washers
- DIN9021 Large Washer
- ASME/ANSI B 18.21.1 (USS) Flat Washer
- ASME/ANSI B 18.21.1 (SAE) Flat Washer
- DIN25201 Stainless Steel Double Fold Self-locking Washer
- DIN6797A Stainless Steel External Teeth Lock Washers
- Stainless Steel DIN6797J Internal Teeth Lock Washers
Application of ASME/ANSI B18.21.1 Standard Helical Stainless Steel Spring-Lock Washers:
ASME/ANSI B18.21.1 Standard Helical Stainless Steel Spring-Lock Washers provide continuous spring force to maintain pressure between fasteners and assembled components. This makes them especially suitable for applications exposed to vibration, shock, thermal expansion, or repeated mechanical movement, helping improve the reliability of bolted connections.
| Application | Details |
|---|---|
| Automotive Industry | Used in vehicle assemblies, engine components, suspension systems, braking systems, and electrical parts to help maintain fastening tension under continuous vibration and movement. |
| Electrical & Electronics Equipment | Suitable for electrical cabinets, control panels, communication equipment, and electronic devices where secure connections and long-term stability are important. |
| Marine and Offshore Industry | Commonly applied in ships, marine equipment, and coastal facilities due to the excellent corrosion resistance of stainless steel materials in humid and saltwater environments. |
| Machinery & Industrial Equipment | Applied in manufacturing machines, automation equipment, motors, pumps, compressors, and mechanical assemblies to reduce the risk of bolt loosening caused by operational vibration. |
| Furniture & Hardware | Used in metal furniture, fittings, and hardware products where a neat countersunk appearance is preferred. |
| Construction & Building Applications | Used in metal furniture, fixtures, and general hardware products to improve assembly reliability and extend service life. |