Security Ratings Explained
Security Ratings

Hafren Security Ratings

Security Level 1

Entry Level
Fasteners offer protection from vandalism and opportunistic crime. Drivers can be purchased by the general public.

Security Level 2

Enhanced Security
Fasteners are less Common and less Recognizable. Driver Tooling is non-standard and Harder for the general public to buy.

Security Level 3

Medium Security
Rarer (less well-known) products. Supply of driver tooling is controlled, less readily available to buy, enhancing the security of the assembly.

Security Level 4

High Security
Either 1-way permanent fixing, or rare Hafren patented high security products requiring specialist tooling to remove (only available from Hafren approved distributors).

Security Level 5

Maximum Security
Highest security available. Products are either 1-way permanent fixings, or require bespoke exclusive, custom made driver tools to remove.

Countersunk 6-Lobe Pin Barrel Nut

Product Details

Countersunk A2 Stainless Steel Barrel Nut (with 6-Lobe Pin Drive).

Ensures maximum security when clamping two materials together.

These Barrel Nuts (also known as Interscrews) are internally threaded parts that are ideal for clamping two pieces of material together when used with machine screws. Ideal for playground equipment, ironmongery and signage to name a few.

  • Manufactured with 6-Lobe Pin Security Drive
  • stocked in A2 Stainless Steel
  • Also available as Button Head




Security Rating Explained

Size Length Material Driver Size Part No. Small Box Qty
M4 12mm A2 Stainless Steel T20 RTCBN0412 100
M5 16mm A2 Stainless Steel T25 RTCBN0516 100
M6 16mm A2 Stainless Steel T30 RTCBN0616 100
M8 20mm A2 Stainless Steel T40 RTCBN0820 100
M10 25mm A2 Stainless Steel T45 RTCBN1025 100


* indicates required