Knurled Thumb Screws
GB 834 Knurled Thumb Screws feature a high knurled head designed for convenient hand tightening and adjustment without the need for a separate tool. The knurled surface provides a firm grip, while the threaded shank secures components in mechanical assemblies and equipment.
Manufactured according to GB/T 834-1988, these screws are available in metric sizes from M1.6 to M10. The standard defines the key dimensions of the knurled head, threaded shank, and screw length to ensure consistent fit and assembly. GB 834 Knurled Thumb Screws are suitable for manual adjustment, component fastening, fixtures, instruments, machinery, and equipment where frequent installation or adjustment is required. Different materials and surface finishes can be supplied according to the application and customer requirements.
Specification:
| Item | Specification |
|---|---|
| Standard | GB834 |
| Product Typle | Knurled Thumb Screw |
| Head Type | High Knurled Head |
| Drive Type | Knurled Head,Hand Tightening |
| Size Rangle | M1.6-M10 |
| Thread Standard | ISO261,ISO965 |
| Thread Tolerance | 6g |
| Class | 4.8,A2-70 |
| Mechanical Proeprty | ISO898-1,ISO3506-1 |
| Material | Carbon Steel,Stainless Steel |
| Surface Treatment | Zinc Plated, Black Oxidation,Bright Finish |
| Packaging: | Boxes/cartons into wooden pallets |
Dimension Chart of Knurled Thumb Screws:
| Mon | M1.6 | M2 | M2.5 | M3 | M4 | M5 | M6 | M8 | M10 |
| P | 0.35 | 0.4 | 0.45 | 0.5 | 0.7 | 0.8 | 1 | 1.25 | 1.5 |
| dk max | 7.22 | 8.22 | 9.22 | 11.27 | 12.27 | 16.27 | 20.33 | 24.33 | 30.33 |
| dk min | 6.78 | 7.78 | 8.78 | 10.73 | 11.73 | 15.73 | 19.67 | 23.67 | 29.67 |
| k max | 4.7 | 5 | 5.5 | 7 | 8 | 10 | 12 | 16 | 20 |
| k min | 4.52 | 4.82 | 5.32 | 6.78 | 7.78 | 9.78 | 11.57 | 15.57 | 19.84 |
| k1 | 2 | 2 | 2.2 | 2.8 | 3 | 4 | 5 | 6 | 8 |
| h | 0.8 | 1 | 1 | 1.2 | 1.5 | 2 | 2.5 | 3 | 3.8 |
| r min | 0.1 | 0.1 | 0.1 | 0.1 | 0.2 | 0.2 | 0.25 | 0.4 | 0.4 |
| d1 | 4 | 4.5 | 5 | 6 | 8 | 10 | 12 | 16 | 20 |
| d2 | 3.6 | 3.8 | 4.4 | 5.2 | 6.4 | 9 | 11 | 13 | 17.5 |
- RELATED SCREWS LISTS:
- Stainless Steel DIN7976 Hexagon Head Tapping Screws
- Stainless Steel DIN7982 Cross Recessed Countersunk Head Tapping Screws
- Stainless Steel DIN7983 Cross Recessed Raised Countersunk Head Tapping Screws
- Stainless Steel DIN7985 Cross Recessed Raised Cheese Head Screws
- DIN7964E Stainless Steel Socket Head Cap Captive Screw
- Stainless Steel DIN964 Slotted Raised Countersunk Head Screws
- Stainless Steel DIN966 Cross Recessed Raised Countersunk Head Screws
- Stainless Steel DIN967 Cross Recessed Pan Head Screws with Collar
- Stainless Steel DIN968 Cross Recessed Pan Head Tapping Screws with Collar
- GB830 Stainless Steel Slotted Cheese Head Screws with Shoulder
- Stainless Steel GB831 Slotted Shoulder Screws
- Stainless Steel GB835 Knurled Screws
- Stainless Steel GB836Knurled Screws with Small Head
- Stainless Steel GB837 Slotted Pan Head Screws with Waisted Shank
- Stainless Steel GB839 Knurled Thumb Captive Screws with Waisted Shank
- Nickel Plated Smooth Shank Single Shoulder Shelf Support Screw
- Nickel Plated Furniture Shelf Peg with Matching Knurled Nut
Application of GB834 Knurled Thumb Screws:
Manual Adjustment
GB 834 Knurled Thumb Screws are designed for applications requiring frequent manual tightening, loosening, or adjustment. The high knurled head provides a firm grip, allowing the screw to be operated by hand without a separate tool.
Mechanical Equipment
These screws are suitable for mechanical equipment, machinery, and assemblies where components need to be secured while still allowing convenient access for manual adjustment or removal.
Fixtures and Jigs
The compact design makes GB 834 screws suitable for fixtures, jigs, tooling, and positioning mechanisms, particularly where an operator needs to adjust or secure a component during setup.
Instruments and Equipment
Knurled thumb screws can be used in instruments, control equipment, laboratory equipment, and compact assemblies where tool-free adjustment is preferred.