Product Specifications
| Model / Specification | M2.5 – M48 |
| Material | Stainless Steel |
| Used For | M2.5 | M3 | M4 | M5 | M6 | M8 | M10 | M12 | (M14) | M16 | |
| d | Max. | 2.95 | 3.5 | 4.5 | 5.6 | 6.76 | 8.76 | 10.93 | 13.43 | 15.43 | 17.43 |
| Min. | 2.7 | 3.2 | 4.2 | 5.3 | 6.4 | 8.4 | 10.5 | 13 | 15 | 17 | |
| dc | Max. | 8 | 10 | 14 | 17 | 19 | 22 | 26 | 32 | 32 | 40 |
| Min. | 7.64 | 9.64 | 13.57 | 16.57 | 18.48 | 21.48 | 25.48 | 31.38 | 31.38 | 39.38 | |
| L | Nom. | 10 | 12 | 14 | 16 | 18 | 20 | 22 | 28 | 28 | 32 |
| Min. | 9.71 | 11.65 | 13.65 | 15.65 | 17.65 | 19.58 | 21.58 | 27.58 | 27.58 | 31.5 | |
| Max. | 10.29 | 12.35 | 14.35 | 16.35 | 18.35 | 20.42 | 22.42 | 28.42 | 28.42 | 32.5 | |
| h | 0.4 | 0.4 | 0.4 | 0.5 | 0.5 | 0.5 | 0.5 | 1 | 1 | 1 | |
| b | 3 | 4 | 5 | 6 | 7 | 8 | 10 | 12 | 12 | 15 | |
| b1 | 6 | 7 | 9 | 11 | 12 | 16 | 19 | 21 | 25 | 32 | |
| r | 2.5 | 2.5 | 2.5 | 2.5 | 4 | 4 | 6 | 10 | 10 | 10 | |
| Wt./1000 pcs (Steel) ≈ kg | 0.17 | 0.25 | 0.42 | 0.74 | 0.91 | 1.27 | 1.7 | 4.8 | 5.12 | 8.21 | |
| Used For | (M18) | M20 | (M22) | M24 | (M27) | M30 | M36 | M42 | M48 | |
| d | Max. | 19.52 | 21.52 | 23.52 | 25.52 | 28.52 | 31.62 | 37.6 | 43.62 | 50.62 |
| Min. | 19 | 21 | 23 | 25 | 28 | 31 | 37 | 43 | 50 | |
| dc | Max. | 45 | 45 | 50 | 50 | 58 | 63 | 75 | 88 | 100 |
| Min. | 44.38 | 44.38 | 49.38 | 49.38 | 57.26 | 62.26 | 74.2 | 87.13 | 99.13 | |
| L | Nom. | 36 | 36 | 42 | 42 | 48 | 52 | 62 | 70 | 80 |
| Min. | 35.5 | 35.5 | 41.5 | 41.5 | 47.5 | 51.4 | 61.4 | 69.4 | 79.4 | |
| Max. | 36.5 | 36.5 | 42.5 | 42.5 | 48.5 | 52.6 | 62.6 | 70.6 | 80.6 | |
| h | 1 | 1 | 1 | 1 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | |
| b | 18 | 18 | 20 | 20 | 24 | 26 | 30 | 35 | 40 | |
| b1 | 38 | 38 | 39 | 42 | 48 | 55 | 65 | 78 | 90 | |
| r | 10 | 10 | 10 | 10 | 16 | 16 | 16 | 16 | 16 | |
| Wt./1000 pcs (Steel) ≈ kg | 10.93 | 11.83 | 12.61 | 12.68 | 25.81 | 31.17 | 43.81 | 60.28 | 77.9 | |
Single Ear Tab Washer — Product Introduction
The single ear tab washer is manufactured in accordance with GB/T 854—1988 and consists of a washer body, an inner tab, and a single outer ear. During use, the inner tab is inserted into the shaft groove while the outer ear is bent over the edge of the round nut, forming a mechanical lock that effectively prevents the nut from loosening under vibration and impact. The product features a simple structure and convenient installation, and is widely used for shaft-end anti-loosening connections in various applications.
I. Product Features
- Standardized design: Dimensions comply with GB/T 854—1988, ensuring good fit with standard round nuts and strong interchangeability.
- One-piece forming: The washer body, inner tab, and outer ear are formed in a single stamping operation. The structure is compact with no welded joints, offering high reliability.
- Easy bending: The outer ear and inner tab can be easily bent and straightened on site. Assembly and disassembly are flexible and do not affect reuse.
- Smooth surface: Edges are free of burrs, ensuring that shafts, nuts, and other mating surfaces are not damaged during assembly.
- Wide adaptability: Complete size range covering anti-loosening requirements for various thread diameters and shaft sizes.
II. Product Advantages
- Reliable anti-loosening: The inner tab engages the shaft groove while the outer ear bends around the nut, achieving mechanical locking with excellent anti-loosening performance.
- Vibration and impact resistant: Maintains locked condition under vibration and impact, effectively preventing nut loosening.
- Simple operation: No special tools required — ordinary pliers can complete the bending, locking, and removal processes.
- Easy maintenance: During disassembly, the outer ear can be straightened, allowing the nut to be removed. The washer can be reused or replaced.
- Strong versatility: Compatible with standard round nuts such as GB/T 812, suitable for a wide range of mechanical transmission structures.
III. Applications
Suitable for shaft-end positions requiring round nut anti-loosening in various types of mechanical equipment, including:
- General machinery: Reducers, motors, pumps, fans, drive shafts, etc.
- Automotive and motorcycles: Steering mechanisms, drive shafts, wheel hubs, and other fastening positions.
- Construction machinery: Excavators, loaders, lifting equipment, and other high-vibration applications.
- Agricultural machinery: Tractors, harvesters, seeders, etc.
- Power and communication equipment: Outdoor installations, towers, terminal connections, and other threaded connections requiring anti-loosening.
- Light industry and household equipment: Washing machines, power tools, fitness equipment, etc.
