Product Specifications
| Model / Specification | M10 - 200 |
| Material | Carbon Steel |
| Spec. | 10 | 12 | 14 | 16 | 18 | 20 | 22 | 24 | 25 ① | 27 | 30 | 33 | 35 ① | 36 | 39 | 40 ① |
| d | 10.5 | 12.5 | 14.5 | 16.5 | 18.5 | 20.5 | 22.5 | 24.5 | 25.5 | 27.5 | 30.5 | 33.5 | 33.5 | 36.5 | 39.5 | 40.5 |
| dc | 25 | 28 | 32 | 34 | 35 | 38 | 42 | 45 | 45 | 48 | 52 | 56 | 56 | 60 | 62 | 62 |
| D1 | 16 | 19 | 20 | 22 | 24 | 27 | 30 | 34 | 34 | 37 | 40 | 43 | 43 | 46 | 49 | 49 |
| s | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 |
| h | 3 | 3 | 3 | 3 | 4 | 4 | 4 | 4 | 4 | 5 | 5 | 5 | 5 | 5 | 5 | 5 |
| b | 3.8 | 3.8 | 3.8 | 4.8 | 4.8 | 4.8 | 4.8 | 4.8 | 4.8 | 4.8 | 4.8 | 5.7 | 5.7 | 5.7 | 5.7 | 5.7 |
| a | 8 | 9 | 11 | 13 | 15 | 17 | 19 | 21 | 22 | 24 | 27 | 30 | 32 | 33 | 36 | 37 |
| Wt. ≈ kg/1000 pcs | 1.91 | 2.3 | 2.5 | 2.99 | 3.04 | 3.5 | 4.14 | 5.01 | 4.7 | 5.4 | 5.87 | 10.01 | 8.75 | 10.76 | 11.06 | 10.33 |
| Spec. | 42 | 45 | 48 | 50 ① | 52 | 55 ① | 56 | 60 | 64 | 65 ① | 68 | 72 | 75 ① | 76 | 80 | 85 |
| d | 42.5 | 45.5 | 48.5 | 50.5 | 52.5 | 56 | 57 | 61 | 65 | 66 | 69 | 73 | 76 | 77 | 81 | 86 |
| dc | 66 | 72 | 76 | 76 | 82 | 82 | 90 | 94 | 100 | 100 | 105 | 110 | 110 | 115 | 120 | 125 |
| D1 | 53 | 59 | 61 | 61 | 67 | 67 | 74 | 79 | 84 | 84 | 88 | 93 | 93 | 98 | 103 | 108 |
| s | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 |
| h | 5 | 5 | 5 | 5 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 7 | 7 | 7 | 7 | 7 |
| b | 5.7 | 5.7 | 7.7 | 7.7 | 7.7 | 7.7 | 7.7 | 7.7 | 7.7 | 7.7 | 9.6 | 9.6 | 9.6 | 9.6 | 9.6 | 9.6 |
| a | 39 | 42 | 45 | 47 | 49 | 52 | 53 | 57 | 61 | 62 | 65 | 69 | 71 | 72 | 76 | 81 |
| Wt. ≈ kg/1000 pcs | 12.55 | 16.3 | 17.68 | 15.85 | 21.12 | 17.67 | 26 | 28.4 | 31.55 | 30.35 | 34.69 | 37.9 | 33.9 | 41.27 | 44.7 | 46.72 |
| Spec. | 90 | 95 | 100 | 105 | 110 | 115 | 120 | 125 | 130 | 140 | 150 | 160 | 170 | 180 | 190 | 200 |
| d | 91 | 96 | 101 | 106 | 111 | 116 | 121 | 126 | 131 | 141 | 151 | 161 | 171 | 181 | 191 | 201 |
| dc | 130 | 135 | 140 | 145 | 156 | 160 | 166 | 170 | 176 | 186 | 206 | 216 | 226 | 236 | 246 | 256 |
| D1 | 112 | 117 | 122 | 127 | 135 | 140 | 145 | 150 | 155 | 165 | 180 | 190 | 200 | 210 | 220 | 230 |
| s | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 |
| h | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 8 | 8 | 8 | 8 | 8 |
| b | 11.6 | 11.6 | 11.6 | 11.6 | 13.5 | 13.5 | 13.5 | 13.5 | 13.5 | 13.5 | 15.5 | 15.5 | 15.5 | 15.5 | 15.5 | 15.5 |
| a | 86 | 91 | 96 | 101 | 106 | 111 | 116 | 121 | 126 | 136 | 146 | 156 | 166 | 176 | 186 | 196 |
| Wt. ≈ kg/1000 pcs | 64.82 | 67.4 | 69.97 | 72.54 | 89.08 | 91.33 | 94.96 | 97.21 | 100.8 | 106.7 | 175.9 | 185.1 | 194 | 202.9 | 211.7 | 220.6 |
Retaining Washer — Product Description
Retaining washer, also known as lock washer or stop washer, is a mechanical anti-loosening component typically used in conjunction with bolts and nuts. It achieves locking by bending tabs into nut slots, shaft grooves, or equipment surfaces, or through wedge-shaped surface interlock to generate clamping force, effectively preventing threaded connections from loosening under vibration, impact, and alternating loads. The product is commonly made of carbon steel, stainless steel, or alloy steel, with surface treatments including blackening, zinc plating, and Dacromet, offering reliable anti-loosening performance and excellent corrosion resistance. Common types include single ear/double ear retaining washers, external tab/internal tab stop washers, round nut retaining washers, and double-stack self-locking washers (wedge-type lock washers).
I. Product Features
Reliable Mechanical Locking
Achieves locking through tab bending or wedge surface engagement, with anti-loosening effect not solely dependent on friction, providing strong resistance to vibration and impact.
Diverse Structural Forms
Available in single ear, double ear, external tab, internal tab, round nut, double-stack wedge, and other configurations to adapt to different mounting positions and locking requirements.
Reusable
Some types, such as double-stack self-locking washers, can be disassembled and reused multiple times without damaging bolt or nut threads.
Excellent Material and Surface Treatment
Materials such as carbon steel, stainless steel, and spring steel can be selected based on working conditions, with surface treatments including blackening, zinc plating, Dacromet, and phosphating, offering good corrosion and temperature resistance.
Easy Installation
No special tools required, used in combination with standard fasteners, simple and quick installation.
II. Product Advantages
Strong Anti-Loosening Performance
Effectively maintains preload under harsh conditions such as vibration, impact, and alternating loads, preventing connection loosening and failure.
High Safety and Reliability
Reduces the risk of equipment failure and safety accidents caused by bolt loosening, ensuring long-term stable equipment operation.
Economical and Durable
Reusable, reducing maintenance and replacement costs, and extending the service life of fastening connections.
Wide Adaptability
Multiple structures, materials, and specifications available to meet diverse requirements from light to heavy loads, normal to high temperatures, and ordinary to corrosive environments.
Easy Disassembly and Assembly
Compared with chemical locking, welding, and other permanent anti-loosening methods, disassembly does not easily damage threads or base material, facilitating inspection and maintenance.
III. Scope of Application
Retaining washers are widely used in various threaded connection applications requiring reliable anti-loosening, mainly including:
Rail transit, automotive manufacturing, engineering machinery, mining machinery
Wind power equipment, power equipment, steel structure bridges
Petroleum and chemical industry, pressure vessels, pipe flanges
Shipbuilding, aerospace, military equipment
Motors, pumps, compressors, reducers, and other mechanical equipment
Various equipment and structural connection locations with significant vibration and impact
