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Knurled Reduced Thread Captive Thumb Screws

SKU: CP18 Category:

These Knurled Captive Thumb Screws are a variant of the DIN 663 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, with optional thread locking patches available.

Specials in a range of materials, finishes and sizes are available upon request.

Please contact us to further your enquiry.knurled captive thumb screws din 633

d1 and L1 dimensions can be to customer specification.

Knurled Reduced Thread Captive Thumb Screws (DIN 663)
THREAD 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
H (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

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