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Security Wave Captive Screws

Security Wave Captive Screws are a tamper proof screw, ideal for the highest security applications. They are the perfect match with security wave nuts, and are also suitable for use with shear nuts, Kinmar reusable nuts, Kinmar permanent nuts and 4-hole nuts or Pin Torx Barrel Nuts in order to provide extra security.

These tamper proof screws can be either supplied with either a two way reusable or one way permanent security drive. The unique rounded design incorporates varying angles and radiuses to resist against grips such as pliers – making it ideal for applications where the highest level of security is essential.

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

Security Wave Captive screws require a special driver tool which is able to be stamped and registered with a customer-specific reference number – allowing the tool to be tracked and personnel that have used it traced if they are registered against the tool. Distribution of the tool is restricted, meaning that only manufacturers and installers who have purchased the screws can purchase additional tools. Under no circumstances will the tools be sold to ‘non-account’ customers.

Manufactured as standard in A1 Stainless Steel and A4 Stainless Steel, with other materials available to order.

Available from Fastenright in thread sizes from M2 to M48 as standard. Imperial threads also available upon request.

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

Security Wave Captive Screws Technical Drawing

d1, L and L1 dimensions can be to customer specification.

Metric Technical Information (Standard and Fine Pitch)
Thread Diameter / Dimension k (mm) dk (mm) d1 (mm) L1 (mm) Max Torque
M2 3.2 7.9 1.4 4.0
M2.5 3.2 7.9 1.8 5.0
M3 3.2 7.9 2.2 6.0 7 n/m
M4 3.2 7.9 3.0 8.0 8 n/m
M5 4.2 9.5 3.8 10.0 10 n/m
M6 5.5 12.7 4.5 12.0 12 n/m
M8 6.4 15.8 6.2 16.0 35 n/m
M9
M10 7.2 19.0 8.0 20.0 50 n/m
M12 8.7 22.2 9.5 24.0 65 n/m
M14 11.0 28.5 11.0 26.0 75 n/m
M16 11.0 28.5 12.5 28.0 75 n/m
M20 12.8 34.9 85 n/m
M22 12.8 34.9 85 n/m
M24 14.2 38.0 120 n/m
M30
M33
M36
M39
M42
M45
M48

 

Imperial Technical Information (UNC / UNF / BSW / BSF)
Thread Diameter / Dimension k (mm) dk (mm) d1 (mm) L1 (mm)
No. 2 3.2 7.9 1.4 4.0
No. 3 3.2 7.9 1.8 5.0
No. 4 3.2 7.9 2.2 6.0
No. 6 3.2 7.9 2.6 7.0
No. 8 3.2 7.9 3.0 8.0
No. 10 4.2 9.5 3.8 10.0
No. 12 4.2 9.5 4.1 11.0
1/4″ 5.5 12.7 4.5 12.0
5/16″ 6.4 15.8 6.2 16.0
3/8″ 7.2 19.0 8.0 20.0
7/16″ 8.7 22.2 9.5 24.0
1/2″ 8.7 22.2 9.5 24.0
9/16″ 11.0 28.5 11.0 26.0
5/8″ 11.0 28.5 12.5 28.0
3/4″ 12.8 34.9
7/8″ 14.2 38.0
1″
1. 1/8″
1. 1/4″
1. 3/8″
1. 1/2″
1. 3/4″
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