ASME/ANSI B18.21.1 Standard Helical Stainless Steel Spring-Lock Washers Supplier In China
Ningbo Teng Qi Fasteners Co., Ltd. is a reliable ASME/ANSI B18.21.1 Internal Teeth Lock Washers supplier, we specialize in providing high-quality locking solutions for customers who require secure and durable fastening performance. With extensive experience in stainless steel fastener manufacturing, we focus on strict control of raw materials, production processes, and dimensional accuracy to ensure every internal teeth lock washer meets international standard requirements. Our washers feature precisely formed internal teeth that provide effective locking performance, helping reduce fastener loosening caused by vibration and mechanical movement.
Different from general washer suppliers, we provide more than standard products by offering flexible solutions for various industrial applications. We can supply ASME/ANSI B18.21.1 Internal Teeth Lock Washers in stainless steel materials such as AISI 304 and AISI 316, with customized sizes, surface treatments, and packaging options available according to customer needs. Supported by professional quality inspection and export experience, our internal tooth lock washers are widely trusted for their corrosion resistance, stable performance, and long service life in industries including machinery, automotive, electrical equipment, construction, and industrial manufacturing.
Specification:
ASME/ANSI B18.21.1 Internal Teeth Lock Washers are manufactured according to the ASME/ANSI standard and are designed to provide reliable locking performance for threaded fastener assemblies. The washer features inward-facing teeth that bite into the underside of the fastener head or nut, creating additional friction and helping prevent loosening caused by vibration, shock, or dynamic loads. These washers are available in different sizes, materials, and finishes to meet various application requirements.
| Product name | ASME/ANSI B18.21.1 Internal Teeth Lock Washers |
|---|---|
| Inner Diamter: | #4-1-1/4““ |
| Material: | 65Mn SS304 |
| Surface Treatment | Bright Pickling/Zinc Plated |
| 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 Internal Teeth Lock Washers provides detailed specifications, including inside diameter, outside diameter, thickness, and tooth height. These dimensions are precisely defined according to the ASME/ANSI B18.21.1 standard to ensure proper compatibility with corresponding screws, bolts, and fastening components. The internal teeth are designed to engage with the fastener head or nut surface, providing additional resistance against loosening caused by vibration or movement.
| Mon | #2 | #3 | #4 | #5 | #6 | #8 | #10 | 1/4 | 5/16 | 3/8 |
| d max | 0.095 | 0.109 | 0.123 | 0.136 | 0.15 | 0.176 | 0.204 | 0.267 | 0.332 | 0.398 |
| d min | 0.089 | 0.102 | 0.115 | 0.129 | 0.141 | 0.168 | 0.195 | 0.256 | 0.32 | 0.384 |
| dc max | 0.2 | 0.232 | 0.27 | 0.28 | 0.295 | 0.34 | 0.381 | 0.478 | 0.61 | 0.692 |
| dc min | 0.175 | 0.215 | 0.245 | 0.255 | 0.275 | 0.325 | 0.365 | 0.46 | 0.594 | 0.67 |
| h max | 0.016 | 0.016 | 0.018 | 0.02 | 0.022 | 0.023 | 0.024 | 0.028 | 0.034 | 0.04 |
| h min | 0.01 | 0.01 | 0.012 | 0.014 | 0.016 | 0.018 | 0.018 | 0.023 | 0.028 | 0.032 |
ASME/ANSI B18.21.1 External Teeth Lock Washers
DIN7349 Stainless Steel Heavy Clamping Sleeves Washers
Stainless Steel DIN128B Wave Spring Lock Washers
Stainless Steel DIN137A Wave Spring Washers
Black Oxidation DIN2093 SeriesA Disc Spring Washers
Zinc Plated DIN434 Double Grooved Square Taper Washers
DIN5406 Rolling Bearings Stainless Steel Lock Washers
Application of ASME/ANSI B18.21.1 Internal Teeth Lock Washers:
ASME/ANSI B18.21.1 Internal Teeth Lock Washers are designed for applications where preventing fastener loosening is essential. By creating additional friction between the washer and the fastener surface, the internal teeth provide enhanced locking performance and help maintain stable connections under vibration, shock, and dynamic loads.
| Application | Details |
|---|---|
| Automotive Industry | ASME/ANSI B18.21.1 Internal Teeth Lock Washers are widely used in automotive components where fastening reliability is critical. They help prevent bolts and screws from loosening due to engine vibration, road impact, and continuous mechanical movement. Common applications include vehicle assemblies, electrical systems, engine components, and interior fastening parts. |
| Machinery and Equipment Manufacturing | In industrial machinery, production equipment, and mechanical assemblies, internal teeth lock washers provide additional locking force for threaded connections. They are commonly installed with screws and bolts in equipment exposed to vibration or repeated operation, helping maintain stable connections and reduce the need for frequent maintenance. |
| Electrical and Electronic Equipment | These washers are used in electrical cabinets, control panels, motors, and electronic equipment where secure fastening is required. The internal teeth improve contact between the washer and fastener surface, helping maintain connection stability while protecting against loosening caused by equipment operation. |
| Automation and Robotics Industry | In automated production lines, robotic systems, and precision equipment, ASME/ANSI B18.21.1 Internal Teeth Lock Washers help improve the reliability of fastening points subject to continuous movement. Their compact design makes them suitable for applications where space is limited but secure fastening is necessary. |
| Construction and Infrastructure Projects | In construction machinery, structural equipment, and industrial installations, these washers help enhance fastening security in applications exposed to vibration and environmental changes. Stainless steel versions are especially suitable for outdoor environments due to their excellent corrosion resistance. |
| Marine and Outdoor Equipment | Stainless Steel ASME/ANSI B18.21.1 Internal Teeth Lock Washers are commonly used in marine equipment, outdoor machinery, and facilities exposed to moisture or corrosive environments. Materials such as AISI 304 and AISI 316 provide improved resistance against rust and extend the service life of fastening systems. |