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2-Hole Countersunk Security Machine Screw

Tamper-resistant 2-hole security machine screws, to protect against vandals and thieves.

These reusable security screws have a unique two-hole system, where two holes are drilled into the head – requiring a special insert bit to insert and remove the screws.

Ideal for low to medium torque applications and the fact that it is reusable makes it a great security fastener for applications where regular maintenance is required.

The two-pin drive is designed mainly to offer some security but also to maintain the aesthetics of the application that it has been used within.

More prone to cam-out than other security screws such as Pin Torx or Pin Hex security screws, users should also be aware that when tightening the screw the drive bits are prone to bending or breaking after prolonged use and should plan to purchase additional back-ups.

Tamper-resistant 2 Hole Security screws offer a medium security resistance against vandals and thieves at a relatively low cost, proving an economic and secure equilibrium.

For more information and technical data regarding tamper-resistant 2 Hole security products please call our sales team.

Note: Special 2 Hole Security Screws can be made to order including small volume manufacture, modifications and custom parts to drawings.

Tamper Resistant 2 Hole machine 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.

(Metric)

Gauge / Length (mm) 6 8 10 12 16 20 25 30 35 40 50
M3.5
M3
M4
M5
M6
OTHER DIAMETERS AND LENGTHS AVAILABLE TO ORDER

(Imperial)

No.4 – 40 No.6 – 32 No.8 – 32 No.10 – 24 No.10 – 32 No.12 – 24 1/4″ – 20 1/4″ – 28 5/16″ – 18 3/8″ – 16
3/16″
1/4″ yellow triangle icon image
5/16″ yellow triangle icon image
3/8″ yellow triangle icon image yellow triangle icon image yellow triangle icon image
1/2″ yellow triangle icon image yellow triangle icon image yellow triangle icon image yellow triangle icon image yellow triangle icon image
5/8″
7/8″
3/4″ yellow triangle icon image yellow triangle icon image yellow triangle icon image yellow triangle icon image
1″ yellow triangle icon image yellow triangle icon image yellow triangle icon image yellow triangle icon image
1. 1/4″ yellow triangle icon image
1. 1/2″ yellow triangle icon image yellow triangle icon image yellow triangle icon image
1. 3/4″
2″ yellow triangle icon image
2. 1/8″
2. 1/4″
2. 1/2″
3″
4″

– Stainless Steel // yellow triangle icon image – Brass

2 Hole Countersunk Security Screw