Features & Benefits
  • Heavy-duty, self-locking design
  • For use with bolts up to Class 10.9, Grade 8
  • Available in sizes from 1/4" (M6) to 1-1/2" (38MM) Other sizes available by special order.
  • Available in 316L Stainless Steel
  • Carbon Steel washers are case hardened and coated with RoHS-compliant Delta Protekt™
  • Provided in pre-assembled, glued pairs
  • Easy to install with standard tools
  • No re-tightening needed once installed
  • Vibration proof according to MIL-STD-1312-7
Proven Results
Disc-Lock® Locking Washer Junker Test

Disc-Lock® Wedge Locking Washers have been tested on a Junker Vibration Machine. The Junker test, considered the most severe vibration test for bolted joints according to DIN 65151, is used to determine the point at which a bolted joint loses its preload when subjected to shear loading due to transverse vibration.

When tested against a standard washer using the Junker test, Disc-Lock™ Wedge Locking Washers remained secure under severe vibration conditions, while the standard washer loosened significantly.

Proven Applications
Disc-Lock® Wedge Locking Washers outperform conventional, split-ring, and other style washers in a wide variety of high stress, corrosive, and vibration-sensitive applications including:
  • Agriculture Equipment
  • Automotive
  • Construction Equipment
  • Heavy Rail
  • Logging Equipment
  • Marine
  • Military
  • Mining
  • Oil Drilling Equipment
  • Solar
  • Wind
  • Waste Management
  • To install the Disc-Lock® Washer, place the preassembled pair of washers between the nut and the joint material.
  • As the nut is tightened, one half of the Disc-Lock® Washer is seated to the joint material and the other to the nut.

  • Disc-Lock® Washers should only be used against flat, relatively smooth metal surfaces.
  • If the joint material is not metal, the Disc-Lock® washer may be used by securing the metal plate to the joint material in such a manner that the metal plate will not rotate.

  • A torque wrench is not required to install Disc-Lock® Washers.
  • An air-gun can be used when installing and removing Disc-Lock® Washers.
  • If installed correctly, the Disc-Lock® Washer will ensure that the fastener remains secure, and will not require any re-tightening.
Torque Guidelines
When installing Disc-Lock® Washers in a common application, expect an increase in required torque over recommended installation torque to achieve proper clamp load and maximum joint safety. Due to varying installation conditions and customer-specific applications, additional information and torque recommendations are available by contacting Engineering support at Disc-Lock®.

Disc-Lock® Wedge Locking Washers are also available through our Made in the U.S.A. product line.
1 - 10 of 10 | Results Per Page | View | Unit of Measure

Item #

Item Name


Inner Diameter (A)

Outer Diameter (C)

Thickness (EE)

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DL-M10-3/8ss N/A Disc-Lock™ 0.409 Inch (in) Inner Diameter Stainless Steel Washer N/A 3/8 in10 N/A 0.409 in10.38 mm N/A 0.705 in17.90 mm N/A 0.135 in3.4 mm
DL-M11-7/16ss N/A Disc-Lock™ 0.450 Inch (in) Inner Diameter Stainless Steel Washer N/A 7/16 in11 N/A 0.45 in11.43 mm N/A 0.880 in22.35 mm N/A 0.135 in3.330 mm
DL-M12-1/2ss N/A Disc-Lock™ 0.510 Inch (in) Inner Diameter Stainless Steel Washer N/A 1/2 in12 N/A 0.510 in12.95 mm N/A 0.937 in23.82 mm N/A 0.136 in3.450 mm
DL-M14-9/16ss N/A Disc-Lock™ 0.572 Inch (in) Inner Diameter Stainless Steel Washer N/A 9/16 in14 N/A 0.572 in14.53 mm N/A 1.128 in28.65 mm N/A 0.127 in3.230 mm
DL-M16-5/8ss N/A Disc-Lock™ 0.651 Inch (in) Inner Diameter Stainless Steel Washer N/A 5/8 in16 N/A 0.651 in16.53 mm N/A 1.247 in31.67 mm N/A 0.134 in3.4 mm
DL-M20-3/4ss N/A Disc-Lock™ 0.820 Inch (in) Inner Diameter Stainless Steel Washer N/A 3/4 in20 N/A 0.820 in20.82 mm N/A 1.381 in35.08 mm N/A 0.183 in4.650 mm
DL-M22-7/8ss N/A Disc-Lock™ 0.883 Inch (in) Inner Diameter Stainless Steel Washer N/A 7/8 in22 N/A 0.883 in22.44 mm N/A 1.470 in37.34 mm N/A 0.240 in6.10 mm
DL-M24-1ss N/A Disc-Lock™ 1.015 Inch (in) Inner Diameter Stainless Steel Washer N/A 1 in24 N/A 1.015 in25.78 mm N/A 1.626 in41.30 mm N/A 0.240 in6.10 mm
DL-M6-1/4ss N/A Disc-Lock™ 0.262 Inch (in) Inner Diameter Stainless Steel Washer N/A 1/4 in6 N/A 0.262 in6.66 mm N/A 0.495 in12.57 mm N/A 0.101 in2.560 mm
DL-M8-5/16ss N/A Disc-Lock™ 0.326 Inch (in) Inner Diameter Stainless Steel Washer N/A 5/16 in8 N/A 0.326 in8.28 mm N/A 0.628 in15.95 mm N/A 0.119 in3.020 mm
1 - 10 of 10 | Results Per Page | View | Unit of Measure