Description and Translation of GB/T 95 Fasteners
GB/T 95 fasteners, a fundamental Chinese standard for mechanical components, function as plain washers widely used in machinery, electrical equipment, and structural assemblies. Their primary role is to distribute clamping force evenly between bolt heads/nuts and connected surfaces, preventing surface damage, reducing pressure concentration, and ensuring stable fastening in various static and dynamic applications. These washers also compensate for surface irregularities and provide electrical insulation in specific scenarios.
In terms of materials, GB/T 95 fasteners are predominantly manufactured from carbon steel (e.g., Q235 and 10# steel conforming to relevant standards) and low-alloy steel, offering appropriate mechanical strength and ductility. For corrosion-resistant requirements, galvanized carbon steel variants are specified, while stainless steel options (e.g., 304) are available for enhanced rust resistance in humid or chemical environments.
Surface treatments include zinc plating with passivation to improve corrosion resistance, phosphating for better lubrication during assembly, and black oxide coating for increased wear resistance. These treatments effectively extend service life and optimize compatibility with diverse operating conditions.
Key characteristics of GB/T 95 fasteners include standardized outer diameters and thicknesses, flat annular profiles with rounded edges, and precise dimensional tolerances ensuring interchangeability. Their mechanical attributes feature specified hardness values, sufficient elasticity to maintain clamping force, and uniform thickness. Additionally, they exhibit reliable load distribution performance and good compatibility with various bolts/nuts, making them indispensable in general industrial fastening applications and mechanical manufacturing.
| Size | Φ1.6 | Φ2 | Φ2.5 | Φ3 | (Φ3.5) | Φ4 | Φ5 | Φ6 | Φ8 | Φ10 | Φ12 | (Φ14) | Φ16 | (Φ18) | Φ20 | ||
| d | min=nominal size | 1.8 | 2.4 | 2.9 | 3.4 | 3.9 | 4.5 | 5.5 | 6.6 | 9 | 11 | 13.5 | 15.5 | 17.5 | 20 | 22 | |
| max | 2.05 | 2.65 | 3.15 | 3.7 | 4.2 | 4.8 | 5.8 | 6.96 | 9.36 | 11.43 | 13.93 | 15.93 | 17.93 | 20.43 | 22.52 | ||
| dc | max=nominal size | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 12 | 16 | 20 | 24 | 28 | 30 | 34 | 37 | |
| min | 3.25 | 4.25 | 5.25 | 6.1 | 7.1 | 8.1 | 9.1 | 10.9 | 14.9 | 18.7 | 22.7 | 26.7 | 28.7 | 32.4 | 35.4 | ||
| h | Nominal Size | 0.3 | 0.3 | 0.5 | 0.5 | 0.5 | 0.8 | 1 | 1.6 | 1.6 | 2 | 2.5 | 2.5 | 3 | 3 | 3 | |
| max | 0.4 | 0.4 | 0.6 | 0.6 | 0.6 | 1 | 1.2 | 1.9 | 1.9 | 2.3 | 2.8 | 2.8 | 3.6 | 3.6 | 3.6 | ||
| min | 0.2 | 0.2 | 0.4 | 0.4 | 0.4 | 0.6 | 0.8 | 1.3 | 1.3 | 1.7 | 2.2 | 2.2 | 2.4 | 2.4 | 2.4 | ||
| per 1000 units ≈ kg | 0.024 | 0.036 | 0.085 | 0.115 | 0.15 | 0.3 | 0.43 | 0.991 | 1.73 | 3.44 | 6.07 | 8.38 | 10.98 | 13.98 | 16.37 | ||
Flat washers sourced to confirmed inside diameter, outside diameter, thickness, material and finish requirements.
Load distribution, surface protection and spacing in bolted assemblies when approved by the joint designer.
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 Flat Washer, or attach a controlled drawing. Similar product names do not guarantee dimensional interchangeability.
Specify the required material, property class or grade for the Flat Washer. The proposed supply is confirmed against those requirements before quotation.
Confirm inside diameter, outside diameter, thickness, hardness or grade, material and coating. 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 Flat 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 Flat 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 Flat Washer.
