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Security Pin TX Button Reduced Thread Captive Screws

Security Pin TX Button Reduced Thread Captive Screws host a Pin Torx drive and are often used for safety reasons – required by EU law for a range of safety equipment.

These screws host a reduced thread, which is an unthreaded portion beneath the head, stopping 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 its tamper-proof properties. They have been developed to prevent or significantly hinder the possibility of interference with the fixture, aided by the unthreaded portion of the screw.

The employment of a tamper-proof drive on a Security Captive screw is to ensure the installer is the only person able to perform maintenance on the fastener.

Security Pin Torx Button Reduced Thread Captive Screws are often found in industrial machinery and military applications.

Standard 6 Lobe Button Head Captive Screws are also available from Fastenright.

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

Non-standard sizes, materials and finishes are available to order as specials, including small volume manufacture, modifications and custom parts made to drawings.
security captive screws

d1 and L1 dimensions can be to customer specification.

Technical Data & Available Sizes
Thread Diameter M3 M4 M5 M6 M8 M10
DK (mm) 5.5 5.7* 7.4 7.6* 9.3 9.5* 10.4 10.5* 13.7 14* 17
d1 (mm) 2.2 3 3.8 4.5 6.2 8
L1 (mm) 6 4* 8 5* 10 6* 12 8* 16 10* 20
K (mm) 1.6 1.65* 2.1 2.2* 2.7 2.75* 3.2 3.3* 4.3 4.4* 5.8
Available Sizes (L) M3 M4 M5 M6 M8 M10
8mm black icon image*  
10mm black icon image* black icon image*
12mm black icon image black icon image* black icon image* black icon image*
14mm black icon image
16mm black icon image black icon image black icon image* black icon image* black icon image*
18mm black icon image black icon image
20mm black icon image black icon image 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 black icon image*
30mm black icon image 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
Parts with * host different dimensions.
Size not listed? Please enquire – we may be able to provide it.

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