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Security System Zero Captive Screws

System Zero Security Captive screws feature a domed head and an external non-slip drive that helps to avoid damage to adjacent components. They are two-way, reusable fixings which are ideal for applications where regular maintenance is required.

Captive screws are designed with an unthreaded portion below the head, often referred to as the reduced shank. Once installed, this screw is designed to self retain – increasing safety and preventing any loss of fasteners.

The System Zero drive is designed to resist cam-out which makes the screw suitable for higher torque applications. They require a special System Zero Security Insert Bit for installation and removal – also available at Fastenright.

Security System Zero Captive Screws are manufactured in Steel and A2 Stainless Steel as standard, with other materials and finishes available on request.

Available now in thread sizes M2 to M8 as standard, with lengths ranging from 8mm to 60mm. Other sizes are available to order.

Fastenright supply a wide variety of Captive Screws to suit most applications and assemblies, as well as a huge range of Security Screws.

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.

Security System Zero Captive Screws Technical Drawing

d1 and L1 dimensions can be to customer specification.

Technical Data & Available Sizes
Thread
Diameter
M2 M2.5 M3 M3.5 M4 M4.5 M5 M6 M8
dk (mm) 3.5 4.5
4.5 6 6 7.5 7.5 9 12
k (mm) 1.1 1.6 1.6 2.1 2.1 2.6 2.6 3.1 4.2
c (mm) 0.4 0.5 0.5 0.5 0.5 0.8 0.8 1 1.2
d1 (mm) 1.4 1.8 2.2 2.6 3.0 3.4 3.8 4.5 6.2
d2 (mm) 4.5 5.5 5.5 7.5 7.5 9 9 11 14.5
L1 (mm) 4.0 5.0 6.0 7.0 8.0 9 10 12 16
Available
Lengths (L)
M2 M2.5 M3 M3.5 M4 M4.5 M5 M6 M8
8mm
10mm
12mm
15mm
16mm
20mm
25mm
30mm
35mm
40mm
45mm
50mm
55mm
60mm
 black icon image = Available
Size not listed? Please make an enquiry – we may be able to provide it.
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