Product Specifications
| Model / Specification | M1.4 – M10 |
| Material | Carbon Steel |
| Thread size D |
M1.4 | M1.6 | M2 | M2.5 | M3 | M4 | M5 | M6 | M8 | M10 | ||
| P | Pitch | 0.3 | 0.35 | 0.4 | 0.45 | 0.5 | 0.7 | 0.8 | 1 | 1.25 | 1.5 | |
| dk | Pre-knurl | Max. | 6 | 7 | 8 | 9 | 11 | 1212 | 16 | 20 | 24 | 30 |
| Min. | 5.78 | 6.78 | 7.78 | 8.78 | 10.73 | 11.73 | 15.73 | 19.67 | 23.67 | 29.67 | ||
| m | Max. | 2 | 2.5 | 2.5 | 2.5 | 3 | 3 | 4 | 5 | 6 | 8 | |
| Min. | 1.75 | 2.25 | 2.25 | 2.25 | 2.75 | 2.75 | 3.7 | 4.7 | 5.7 | 7.64 | ||
| k | 1.5 | 2 | 2 | 2.0 | 2.5 | 2.5 | 3.5 | 4.0 | 5.0 | 6.0 | ||
| dw | Max. | 3.5 | 4 | 4.5 | 5 | 6 | 8 | 10 | 12 | 16 | 20 | |
| Min. | 3.2 | 3.7 | 4.2 | 4.7 | 5.7 | 7.64 | 9.64 | 11.57 | 15.57 | 19.48 | ||
| r | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 1 | 1 | 2 | ||
| c | 0.2 | 0.2 | 0.2 | 0.2 | 0.3 | 0.3 | 0.5 | 0.5 | 0.8 | 0.8 | ||
| da | Max. | 1.64 | 1.84 | 2.3 | 2.9 | 3.45 | 4.6 | 5.75 | 6.75 | 8.75 | 10.8 | |
| Min. | 1.4 | 1.6 | 2 | 2.5 | 3 | 4 | 5 | 6 | 8 | 10 | ||
| Wt./1000 pcs (steel) ≈ kg | 0.31 | 0.56 | 0.73 | 0.91 | 1.69 | 1.98 | 4.96 | 9.23 | 16.4 | 32.36 | ||
Knurled Thin Nut — Product Introduction
The knurled thin nut is a slim-profile nut conforming to the GB/T 807-1988 standard. Its most distinctive feature is the straight-knurl pattern on the outer circumference. This design not only facilitates manual tightening and adjustment without the need for tools such as a wrench, but also allows the knurled teeth to bite into the surface of the mating part after tightening, providing an anti-loosening and anti-rotation effect. Its thread specifications cover M1.4 to M10 and it is widely used in electronics and electrical equipment, packaging machinery, automotive manufacturing, and various applications requiring frequent disassembly or compact spaces.
I. Product Features
- Knurled outer edge design: The outer ring of the nut features straight knurling (cross-hatch knurling can also be machined), providing a good anti-slip grip that makes finger tightening or loosening easy.
- Thin and flat structure: The overall height of the nut is thinner than that of a conventional nut, making it suitable for space-restricted assembly locations, and providing effective clamping force within a limited threaded length.
- Clear specification range: The standard specifies thread sizes from M1.4 to M10, covering a variety of metric coarse-pitch threads.
- Diverse materials and surface treatments: Common materials include carbon steel, stainless steel (304/316), brass, and aluminum alloy; carbon steel parts can be zinc-plated and passivated or nickel-plated to enhance corrosion resistance, while stainless steel parts are typically left uncoated.
II. Product Advantages
- Tool-free operation, efficient assembly/disassembly: The knurling provides sufficient friction to enable quick finger tightening, especially suitable for occasions requiring frequent adjustment or disassembly, such as equipment commissioning and cover plate fixing.
- Built-in anti-loosening and anti-rotation function: After tightening, the knurled teeth embed into the surface of the mating part, forming a mechanical interlock that effectively prevents the nut from loosening or turning together with vibration, eliminating the need for additional locking washers.
- Strong spatial adaptability: The thin design gives it a clear advantage in compact assembly spaces — it performs the fastening function without adding excessive structural height.
- Flexible selection, controllable cost: From zinc-plated carbon steel to stainless steel and brass, a variety of materials and surface treatment options can meet different corrosion-resistance, conductivity, or strength requirements, making it easy to balance cost and performance.
III. Application Scope
- Electronics, electrical and instrumentation: Used for fixing and adjustment of chassis panels, terminal blocks, adjustment knobs, and similar parts.
- Mechanical equipment: Machine tools, textile machinery, packaging machinery, and other connection points requiring frequent finger operation or compact spaces.
- Automotive and transportation: Fastening locations in automotive parts and rail transit equipment that require vibration and loosening resistance.
- Marine and outdoor equipment: Containers and shelving, marine transmission, and other occasions where stainless steel versions can adapt to humid or corrosive environments.
- General industry and construction: Various thin-plate structures, aluminum profile connections, curtain wall decoration, and other applications requiring rapid assembly.
