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Security 2-Hole Pan Head Captive Screws

Security 2-Hole Pan Head Captive Screws are designed with two holes drilled into the head. This provides medium security resistance at a relatively low cost, while maintaining the aesthetics of the application it is been used with. These screws require a special insert bit to install and remove.

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.

The security drive design of the vandal-resistant tamper 2-Hole security captive screw makes it suitable for low to medium torque applications. The two-way reusable fixing also makes it the ideal security fastener for applications where frequent maintenance is required.

2-Hole Pan Head Captive Screws are more prone to cam-out than some other security screws such as Pin Hex security screws. We recommend the purchase of additional drive bits as these are prone to bending or breaking after prolonged use.

The two holes in the head can be drilled at different distances (between centres), therefore it is advisable to always purchase the screws and corresponding bits from the same supplier.

2-Hole security screws are also referred to by different names including Snake Eye, Pig Nose, Two Pin and Spanner Drive Screws. They are often used on trains, in public lifts and other areas where both security and aesthetics are important.

These screws can be used with security Wave Nuts, Shear Nuts, Kinmar Reusable Nuts, Kinmar Permanent Nuts, 4-Hole Nuts or Pin Torx Barrel Nuts for added security.

Made in both A2 and A4 Stainless Steel, with both Metric and Imperial sizes available from Fastenright.

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

Security 2-Hole Pan Head Captive Screws Technical Drawing

d1 and L1 dimensions can be to customer specification.

Metric Technical Information & Available Sizes
Thread Diameter M3 M4 M5 M6
dk (mm) 6.0 8.0 10.0 12.0
k (mm) 1.8 2.4 3.0 3.6
d1 (mm) 2.2 3.0 3.8 4.5
L1 (mm) 6.0 8.0 10.0 12.0
Tool Size No. 4 No. 8 No. 10 No. 14
Available Sizes M3 M4 M5 M6
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Size not listed? Please make an enquiry – we may be able to provide it.

 

Imperial Available Sizes
Available Sizes No.4 – 40 No.6 – 32 No.8 – 32 No.10 – 24 No.10 – 32 No.12 – 24 1/4″ – 20 1/4″ – 28
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4″ black icon image black icon image black icon image black icon image
black icon image = Available
Size not listed? Please make an enquiry – we may be able to provide it.
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