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Clutch Head Security Barrel Nuts & Sex Bolts

Tamper proof clutch head security sex bolts protect against vandals and thieves offering:

  • medium security resistance
  • permanent 1-way drive
  • usable for medium torque applications
  • ideal for use in architectural staircasing and balustrading

Tamper Proof Clutch Head Barrel Nut (Sex Bolt Sets)

Gauge / Length 1/2″ 5/8″
10-24 UNC Marker-image Marker-image


Vandal Resistant 1 Way Security Nut
Standard slot screwdriver for use with Clutch Head Sex Bolt

Tamperproof Security Sex Bolts

A security sex bolt is a tamperproof adaptation of the commonly known sex bolt, also known as a barrel nut, barrel bolt, Chicago screw, architectural bolts or post and screw. This is a type of tamperproof security fastener (security nut) which has a barrel-shaped flange and protruding boss that is internally threaded. The boss sits within the components being fastened, and the flange provides the bearing surface. The security sex bolt (male – female bolt) and accompanying tamperproof security machine screw sit flush on either side of the surfaces being fastened. It is normally chosen because of its low profile compared to other nuts. The tamperproof security sex bolt has a built-in security drive feature, such as a 2-Hole, Pin TX, or Clutch to aid in tightening the fastener.

  • Male screws available with or without shoulders.
  • All parts are matched for a finished appearance.
  • Both female and male bolts feature the Security Drive.
  • Head dimensions for both male and female parts are matched.
  • Button Head, Truss Head and Countersunk Head Available
  • Security sex bolts (Male – Female Screws) are made to individual customer requirements.
  • Can be manufactured in steel or stainless steel.

Clutch head barrel nuts technical drawing

10-24 UNC A (mm) B (mm) C (mm)
1/2″ 10.9< 12.6< 6.3<
5/8″ 10.9< 15.9< 6.3<

*For guidance purposes only

Clutch Head One Way Barrel NutClutch Head One Way Male ScrewClutch Head One Way Sex Bolt Sets