Next: TX Button Head Reduced Thread Captive Screws 
Prev: Slotted Countersunk Reduced Thread Captive Screws 
These Knurled Captive Thumb Screws are a variant of the DIN 653 Knurled Captive Thumb Screws.
They feature a large cylindrical head which hosts a knurled edge and are designed to be adjusted easily by hand.
They feature an unthreaded shank, which is often referred to as a reduced thread, which allows for the use of a captive washer and stops the screw from being fully removed from its housing.
Available as standard in A1 Stainless Steel from Fastenright , with optional thread locking patches available.
Sizes available from M2 to M10, with lengths ranging from 8mm to 40mm.
Non-standard sizes and materials are available to order, including custom parts made to drawings.
d1 and L1 dimensions can be to customer specification.
| Knurled Reduced Thread Captive Thumb Screws (DIN 653) | ||||||||||||
| Thread Diameter | M2 | M2.5 | M3 | M3.5 | M4 | M5 | M6 | M8 | M10 | |||
| DK (mm) | 9.29 – 8.71 | 11.35 – 10.65 | 12.35 – 11.65 | 14.35 – 13.65 | 16.35 – 15.65 | 20.42 – 19.58 | 24.42 – 23.58 | 30.42 – 29.58 | 36.5 – 35.6 | |||
| d1 (mm) | 1.4 | 1.8 | 2.2 | 2.6 | 3 | 3.8 | 4.5 | 6.2 | 8 | |||
| L (mm) | 8 | 10 | 12 | 14 | 16 | 20 | 25 | 32 | 40 | |||
| L1 (mm) | 4 | 5 | 6 | 7 | 8 | 10 | 12 | 16 | 20 | |||
| K (mm) | 2 – 1.75 | 2.5 – 2.25 | 2.5 – 2.25 | 3 – 2.75 | 3.5 – 3.2 | 4 – 3.7 | 5 – 4.7 | 6 – 5.7 | 8 – 7.64 | |||
| Available Sizes | M2 | M2.5 | M3 | M3.5 | M4 | M5 | M6 | M8 | M10 | |||
| 6mm | Â | |||||||||||
| 8mm |  |
|||||||||||
| 10mm | |
|
||||||||||
| 12mm | |
|
|
|||||||||
| 14mm | |
|
|
|
||||||||
| 16mm | |
|
|
|
|
|||||||
| 18mm | |
|
|
|
||||||||
| 20mm | |
|
|
|
|
|||||||
| 22mm | |
|
|
|||||||||
| 25mm | |
|
|
|
||||||||
| 28mm | |
|
||||||||||
| 30mm | |
|
||||||||||
| 32mm | |
|
||||||||||
| 35mm | |
|
||||||||||
| 40mm | |
|
||||||||||
| = Available Size not listed? Please call to discuss – we may be able to provide it. |
||||||||||||
