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Security Pin TX Button Reduced Thread Captive Screws

Security Pin TX Button Captive Screws are often used for safety reasons, and are required by EU law on a number of pieces of safety equipment.

Designed with a reduced thread, which is an unthreaded portion beneath the head, which stops the screws from being fully removed from their housing. They can be used alongside Captive Washers to create a self-retaining fastener.

The hexalobular drive, also called security TX, gives the screw tamper-proof properties. Tamper-proof means that they have been developed to prevent or significantly hinder the possibility of interference with the fixture – which with the unthreaded portion makes it incredibly unlikely that the screw will be interfered with.

The employment of a tamper-proof drive on a security captive screw is used to ensure that the installer is the only person able to perform maintenance on the fastener.

They are often found in industrial machinery and military applications.

Available from Fastenright as standard in A2 and A4 Stainless Steel, with sizes from M3 to M10 and lengths ranging from 12mm to 100mm.

Non-standard sizes and materials are available to order, including custom parts made to drawings.

security captive screws

d1 and L1 dimensions can be to customer specification.

Security Pin TX Button Reduced Thread Captive Screws
Thread Diameter M3 M4 M5 M6 M8 M10
DK (mm) 5.5 7.4 9.3 10.4 13.7 17
d1 (mm) 2.2 3 3.8 4.5 6.2 8
L1 (mm) 6 8 10 12 16 20
K (mm) 1.6 2.1 2.7 3.2 4.3 5.8
Available Sizes M3 M4 M5 M6 M8 M10
6mm  
8mm
10mm
12mm black icon image
14mm black icon image
16mm black icon image black icon image
18mm black icon image black icon image
20mm black icon image black icon image black icon image
22mm black icon image black icon image black icon image
25mm black icon image black icon image black icon image black icon image
30mm black icon image black icon image black icon image
35mm black icon image black icon image black icon image
40mm black icon image black icon image black icon image black icon image black icon image
45mm black icon image black icon image black icon image black icon image black icon image
50mm black icon image black icon image black icon image black icon image black icon image
55mm black icon image black icon image black icon image black icon image
60mm black icon image black icon image black icon image black icon image
65mm black icon image black icon image
70mm black icon image black icon image
80mm black icon image black icon image black icon image
90mm black icon image
100mm black icon image
black icon image = Available
Size not listed? Please call to discuss – we may be able to provide it.

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