Disc-Lock Locking Nut

Disc-Lock Locking Nuts

Disc-Lock Locking Nut

What is the Disc-Lock Locking Nut?

The Disc-Lock Locking Nut is a double hex, free-spinning, vibration proof lock nut.

The Disc-Lock Locking Nut is available in a range of sizes from 10mm to 16mm.


How does the Disc-Lock Locking Nut work?

The Disc-Lock Locking Nut is a double hex, fee spinning, vibration-proof lock nut.  It consists of two pieces, each with interlocking cams, which are joined together to form one assembly.  The top part of the Disc-Lock Locking Nut is a threaded hexagon nut with cams on the underside, while the bottom part, the hex flange washer, has cams on the topside.  When the assembly is subjected to vibration and shock, the interlocking cams of the Disc-Lock Locking Nut rise against each other.  As the angle of the cams is greater than the pitch angle of the thread on the stud a wedging effect takes place, thereby locking the assembly.

Disc-Lock Locking Nut - How It Works


Disc-Lock Locking Nuts - UK Rail Industry

Disc-Lock Locking Nuts in Quarrying

Hard Staff

Who uses the Disc-Lock Locking Nut?

Industries and machinery which use Disc-Lock Locking Nuts include:

  • Automotive industries (cars, trucks, buses and coaches)
  • Compressors
  • Construction Industry
  • Cranes
  • Heavy Equipment Manufacturers
  • Farm Equipment
  • Go-Kart Racing
  • Mining
  • Public Utilities
  • Quarrying
  • Rail Industry
  • Rapid Transit Industry






Disc-Lock Locking Nut Technical Specification

The Disc-Lock Locking Nut is available in a range of sizes from 10mm to 16mm.

Disc-Lock Locking Nut Dimensional Chart

M10 x 1.5 15mm 11mm 20mm Magni 565
M12 x 1.75 19mm 17.5mm 25mm Magni 565
M14 x 1.5 24mm 21mm 32mm Magni 565
M16 x 1.5 24mm 21mm 32mm Zinc
M16 x 2 24mm 21mm 32mm Magni 565

Imperial sizes available on application - contact info@disc-lock.co.uk

Key features:

  • Free spinning (no thread interference)
  • One-piece assembly
  • No washer required
  • Installed with standard equipment – no special tools required
  • Easy to remove
  • Reusable
  • Manufactured from medium carbon steel
  • Coated with Magni 565 to comply with RoHS, WEEE and ELV European Directives
  • Can be used with Grade 5 (Class 8.8). Grade 8 (Class 10.9) and even stronger bolts
  • US Military – MIL-STD 1312, Vibration Test 7.  Results available on request to info@disc-lock.co.uk
  • Junker test results also available on request to info@disc-lock.co.uk



Disc-Lock Locking Nut Installation Procedure

To install the Disc-Lock Locking Nut follow the same procedure as for conventional nuts and torque to normal specifications.

To remove the Disc-Lock Locking Nut place the wrench or socket over both hexes and loosen.