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 | ||||||||||||
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14mm | ||||||||||||
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18mm | ||||||||||||
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25mm | ||||||||||||
28mm | ||||||||||||
30mm | ||||||||||||
32mm | ||||||||||||
35mm | ||||||||||||
40mm | ||||||||||||
Size not listed? Please call to discuss – we may be able to provide it. |