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Security 5 Lobe Pin TX Countersunk Head Captive Screws

Security 5 Lobe Pin TX Countersunk Head Captive Screws are a more secure variant of the more common 6 Lobe TX Security Captive Screws – featuring a 5 lobe drive that is similar in shape to a flower petal.

Captive screws feature an unthreaded portion below the head โ€“ often referred to as the reduced shank. When used alongside Threaded Captive Washers, they cannot be fully removed from their housing which prevents any loss of fasteners.

The security pin in the drive recess means that these components can only be removed using matching 5 lobe insert bits. The sale of these bits is restricted for security purposes.

  • Tamper resistant 2-way re-usable security screw.
  • Requires special insert bit that is registered and restricted for controlled availability.
  • Usable for higher-torque applications.
  • 5-Lobe Pin Security screw has a unique 5-Lobe TX head.

Security 5-Lobe Pin TX Countersunk Head Captive Screws are manufactured from A2 / 304 Stainless Steel and A4-70 Stainless Steel as standard.

Available at Fastenright in thread sizes M4 to M8 as standard, with lengths from 16mm to 40mm.

Security Button Head 5 Lobe Pin TX Captive Screws are also available at Fastenright. Our full range of Captive Screws can be found here.

Security 5 Lobe Pin TX Countersunk Head Captive Screws Technical Drawing

d1 and L1 dimensions can be to customer specification.

Technical Data & Availability
Thread Diameter M4 M5 M6 M8
dk (mm) 7.8 7.8 11.8 16.8
k (mm) 2.3 2.8 3.3 4.4
d1 (mm) 3.0 3.8 4.5 6.2
L1 (mm) 8.0 10.0 12.0 16.0
Tool Size No. 1 No. 2 No. 2 No. 2.5
Available Lengths (L) M4 M5 M6 M8
16mm Stainless steel finishblack icon image
20mm Stainless steel finishblack icon image Stainless steel finishblack icon image
25mm black icon image Stainless steel finishblack icon image Stainless steel finishblack icon image
30mm Stainless steel finishblack icon image Stainless steel finishblack icon image
40mm Stainless steel finishblack icon image black icon image black icon image
Stainless steel finish = A2 Stainless Steelย  // black icon image = A4-70 Stainless Steel
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