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

Installation

• 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®.

Note
Disc-Lock® Wedge Locking Washers are also available through our Made in the U.S.A. product line.