Product Specifications
| Model / Specification | M8-M64 |
| Material | Carbon steel, Stainless steel |
| Thread size d | M8 x1 | M10 x1 | M12 x1.5 | M16 x1.5 | M20 x1.5 | M24 x2 | M30 x2 | M36 x3 | M42 x3 | M48 x3 | M56 x4 | M64 x4 |
|---|
| P | Pitch | 1 | 1 | 1.5 | 1.5 | 1.5 | 2 | 2 | 3 | 3 | 3 | 4 | 4 |
| da | Max. | 8.75 | 10.80 | 13.00 | 17.30 | 21.60 | 25.90 | 32.40 | 38.90 | 45.40 | 51.80 | 60.50 | 69.10 |
| Min. | 8.00 | 10.00 | 12.00 | 16.00 | 20.00 | 24.00 | 30.00 | 36.00 | 42.00 | 48.00 | 56.00 | 64.00 |
| dw | Min. | 11.63 | 14.63 | 16.63 | 22.49 | 27.70 | 33.25 | 42.75 | 51.11 | 59.95 | 69.45 | 78.66 | 88.16 |
| e | Min. | 14.38 | 17.77 | 20.03 | 26.75 | 32.95 | 39.55 | 50.85 | 60.79 | 71.3 | 82.6 | 93.56 | 104.86 |
| m | Max. | 4 | 5 | 6 | 8 | 10 | 12 | 15 | 18 | 21 | 24 | 28 | 32 |
| Min. | 3.7 | 4.7 | 5.7 | 7.42 | 9.1 | 10.9 | 13.9 | 16.9 | 19.7 | 22.7 | 26.7 | 30.4 |
| mw | Min. | 2.96 | 3.76 | 4.56 | 5.94 | 7.28 | 8.72 | 11.12 | 13.52 | 15.76 | 18.16 | 21.36 | 24.32 |
| s | Max.=nominal | 13 | 16 | 18 | 24 | 30 | 36 | 46 | 55 | 65 | 75 | 85 | 95 |
| Min. | 12.73 | 15.73 | 17.73 | 23.67 | 29.16 | 35 | 45 | 53.8 | 63.1 | 73.1 | 82.8 | 92.8 |
| Weight ≈ kg / 1000 pcs (steel) | 2.67 | 5.03 | 7.39 | 16.74 | 30.07 | 52.30 | 112.7 | 197.6 | 315.8 | 492.9 | 722.2 | 997.7 |
| Thread size d | (M10) x1.25 | (M12) x1.25 | (M14) x1.5 | (M18) x1.5 | (M20) x2 | (M22) x1.5 | (M27) x2 | (M33) x2 | (M39) x3 | (M45) x3 | (M52) x4 | (M60) x4 |
|---|
| P | Pitch | 1.25 | 1.25 | 1.5 | 1.5 | 2 | 1.5 | 2 | 2 | 3 | 3 | 4 | 4 |
| da | Max. | 10.80 | 13.00 | 15.10 | 19.50 | 21.60 | 23.70 | 29.10 | 35.60 | 42.10 | 48.60 | 56.20 | 64.80 |
| Min. | 10.00 | 12.00 | 14.00 | 18.00 | 20.00 | 22.00 | 27.00 | 33.00 | 39.00 | 45.00 | 52.00 | 60.00 |
| dw | Min. | 14.63 | 16.63 | 19.64 | 24.85 | 27.70 | 31.35 | 38.00 | 46.55 | 55.86 | 64.70 | 74.20 | 83.41 |
| e | Min. | 17.77 | 20.03 | 23.36 | 29.56 | 32.95 | 37.29 | 45.2 | 55.37 | 66.44 | 76.95 | 88.25 | 99.21 |
| m | Max. | 5 | 6 | 7 | 9 | 10 | 11 | 13.5 | 16.5 | 19.5 | 22.5 | 26 | 30 |
| Min. | 4.7 | 5.7 | 6.42 | 8.42 | 9.1 | 9.9 | 12.4 | 15.4 | 18.2 | 21.2 | 24.7 | 28.7 |
| mw | Min. | 3.76 | 4.56 | 5.14 | 6.74 | 7.28 | 7.92 | 9.92 | 12.32 | 14.56 | 16.96 | 19.76 | 22.96 |
| s | Max.=nominal | 16 | 18 | 21 | 27 | 30 | 34 | 41 | 50 | 60 | 70 | 80 | 90 |
| Min. | 15.73 | 17.73 | 20.67 | 26.16 | 29.16 | 33 | 40 | 49 | 58.8 | 68.1 | 78.1 | 87.8 |
| Weight ≈ kg / 1000 pcs (steel) | 5.12 | 7.26 | 11.15 | 22.46 | 30.75 | 43.21 | 78.67 | 145.3 | 255.6 | 397.8 | 609.2 | 857.3 |
Dimensions in mm. The bracketed sizes ((4.5), (5.5), (7)) are non-preferred. Data compiled from GB/T 6173-2015 for selection reference only; actual supply is subject to drawings and inspection reports.
Product Overview
The hexagon thin nut with fine pitch thread is manufactured to GB/T 6173-2015. The nut is hexagonal and tightened with a wrench or socket, and is used together with fine pitch bolts or studs. The thin nut is low in height (about 0.5D), light in weight and compact, and is commonly used as a lock nut (paired with a regular nut) or for fastening in confined spaces. The fine pitch thread self-locks well and resists loosening under vibration, and is widely used in automotive, machinery, electronic and precision equipment.
1. Product Features
- Thin profile, about 0.5D high: light weight and compact.
- Fine pitch thread (smaller pitch than coarse): better self-locking and vibration resistance.
- Commonly used as a lock nut, paired with a regular nut to form a locking assembly.
- Width across flats controlled to the standard to match standard wrenches and sockets.
- Available in carbon steel and stainless steel to suit the service environment and strength requirement.
2. Product Advantages
- The thin design saves axial space and suits compact structures.
- Reliable locking when used as a jam nut, suitable for vibrating conditions.
- High degree of standardisation: the GB/T 6173 dimensional system is complete, which simplifies export matching and second sourcing.
- Material and surface finish can be customised to balance strength, corrosion resistance and cost.
3. Application Scope
- Locking and anti-loosening in automotive, motorcycle and construction machinery.
- Threaded connections in hydraulic and pneumatic systems and precision machinery.
- Mechanical structures in confined spaces that need a compact design.
- Stainless steel versions suit damp or mildly corrosive environments such as chemical, food and electronic equipment.
