Description and Translation of GB 93 Fasteners
GB 93 fasteners, a key Chinese standard for mechanical components, function as spring washers widely used in machinery, electrical equipment, and industrial assemblies. Their primary role is to provide anti-loosening functionality in threaded connections, maintaining clamping force by utilizing elastic deformation to absorb vibration and prevent nut/bolt loosening under dynamic loads. These washers ensure joint stability in applications subject to cyclic stress, thermal expansion, or mechanical vibration.
In terms of materials, GB 93 fasteners are predominantly manufactured from high-carbon spring steel (e.g., 65Mn and 70# steel conforming to relevant standards), offering excellent elasticity, fatigue resistance, and mechanical strength. This material selection ensures the washers can repeatedly deform and recover while maintaining their anti-loosening performance over extended service life.
Surface treatments include zinc plating with passivation to enhance corrosion resistance, phosphate coating for improved lubrication during assembly, and black oxide coating for increased wear resistance and aesthetic appearance. These treatments effectively extend service life and optimize performance in various operating environments.
Key characteristics of GB 93 fasteners include standardized inner diameters and free heights, dished annular profiles with a single split, and precise dimensional tolerances ensuring proper functioning. Their mechanical attributes feature specified hardness values (typically HRC 42-50), appropriate elastic deformation range, and uniform thickness. Additionally, they exhibit reliable anti-loosening performance and good compatibility with bolts/nuts of corresponding sizes, making them indispensable in mechanical fastening applications requiring vibration resistance.
| Nominal Diameter | 2 | 2.5 | 3 | 4 | 5 | 6 | 8 | 10 | 12 | -14 | ||
| d | min | 2.1 | 2.6 | 3.1 | 4.1 | 5.1 | 6.2 | 8.2 | 10.2 | 12.3 | 14.3 | |
| max | 2.3 | 2.8 | 3.3 | 4.4 | 5.4 | 6.7 | 8.7 | 10.7 | 12.8 | 14.9 | ||
| h | Nominal Size | 0.6 | 0.8 | 1 | 1.2 | 1.6 | 2 | 2.5 | 3 | 3.5 | 4 | |
| min | 0.52 | 0.7 | 0.9 | 1.1 | 1.5 | 1.9 | 2.35 | 2.85 | 3.3 | 3.8 | ||
| max | 0.68 | 0.9 | 1.1 | 1.3 | 1.7 | 2.1 | 2.65 | 3.15 | 3.7 | 4.2 | ||
| n | min | 0.52 | 0.7 | 0.9 | 1.1 | 1.5 | 1.9 | 2.35 | 2.85 | 3.3 | 3.8 | |
| max | 0.68 | 0.9 | 1.1 | 1.3 | 1.7 | 2.1 | 2.65 | 3.15 | 3.7 | 4.2 | ||
| H | min | 1.2 | 1.6 | 2 | 2.4 | 3.2 | 4 | 5 | 6 | 7 | 8 | |
| max | 1.5 | 2.1 | 2.6 | 3 | 4 | 5 | 6.5 | 8 | 9 | 10.5 | ||
| per 1000 units ≈ kg | 0.023 | 0.053 | 0.097 | 0.182 | 0.406 | 0.745 | 1.53 | 2.82 | 4.63 | 6.85 | ||
Spring washers sourced against the specified geometry, material, hardness and surface treatment.
Selected mechanical assemblies where the specified spring-washer design has been approved by the customer.
Suitability must be approved against the customer drawing, joint design and service conditions. Product-specific numbers are not published until confirmed by Shuojia and the selected manufacturing partner.
Drawing- and sample-based requests are reviewed with qualified manufacturing partners. State any required material certificate, dimensional report, thread-gauge result, hardness record, coating-thickness report or third-party inspection before quotation.
State the complete standard designation and revision for the Spring Washer, or attach a controlled drawing. Similar product names do not guarantee dimensional interchangeability.
Specify the required material, property class or grade for the Spring Washer. The proposed supply is confirmed against those requirements before quotation.
Confirm nominal size, washer type, material, hardness, finish and required test method. Add any tolerances or mating-part details that control fit or function.
State the service environment, coating system, colour, thickness and corrosion-test requirement. Shuojia will confirm the available Spring Washer sourcing route against the RFQ.
Request the exact records needed, such as material certificates, dimensional results, thread-gauge checks, hardness results or coating-thickness reports. Availability is confirmed in the quotation.
They depend on the final Spring Washer specification, quantity, tooling, finish, inspection and packing. The written quotation confirms all three before an order is placed.
Send the standard or drawing, material and grade, dimensions, finish, quantity, packing, documentation, destination and required delivery date for the Spring Washer.
