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Security Fasteners and General Fixings from Stock and to order

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Security Pin Button Head Tricle Captive Screws

Security Pin Button Head Tricle Captive Screws are typically used in high-security applications as an anti-vandalism or anti-theft fastener – featuring a reduced shank below the head.

These components are recommended for use alongside Threaded Captive Washers for increased protection. Once installed, the screw cannot be fully removed from its housing for a self-retaining fastener.

Pin Button Tricle Captive screws feature a pin drive with a rounded, three-prong shape, requiring a special Tricle Security Insert Bit for installation and removal.

All captive screws conform to the EU Machine Safety Directive 2006 – often used for safety guards, captive panels, and applications where the loss of fasteners must be avoided.

Available at Fastenright in thread diameters M3 to M8, with lengths from 12mm to 50mm. Available as Tricle ‘Type A’ and Tricle ‘Type B’ from Fastenright.

Non-standard sizes, materials and finishes are available to order as specials, including small volume manufacture, modifications and bespoke parts made to drawings. Minimum order quantities apply.

Pin Countersunk Tricle Captive Screws are also available at Fastenright, as well as a wide range of security and non-security Captive Screws.

Security Pin Button Head Tricle Captive Screws Technical Drawing

d1 and L1 dimensions can be to customer specification.

Technical Data & Availability
Thread Diameter M3 M4 M5 M6 M8
dk (mm) 5.7
7.6
10.5 10.5
14
k (mm) 1.65 2.2
3.3 3.3 4.4
d1 (mm) 2.2 3.0 3.8 4.5 6.2
L1 (mm) 6.0 8.0 10.0 12.0 16.0
Available Lengths (L) M3 M4 M5 M6 M8
12mm black icon image
16mm black icon image black icon imagered icon image
20mm black icon image black icon imagered icon image black icon imagered icon image
25mm black icon imagered icon image black icon imagered icon image black icon imagered icon image
30mm black icon image black icon imagered icon image black icon imagered icon image
40mm black icon imagered icon image black icon imagered icon image black icon imagered icon image
50mm black icon imagered icon image black icon imagered icon image
black icon image = Tricle ‘Type A’ // red icon image = Tricle ‘Type B’
Size not listed? Please make an enquiry – we may be able to supply.
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