• Positive mechanical lock that is not dependent on lubricants or plating for repeatability.
• Achieves precise preload - serrations provide adjustment that eliminates back-off or over-torque.
• Eliminates sheet metal tab and cup washers that can cause foreign object damage problems or preload loss sometimes associated with this type of soft washers.
• Internal keyed lug on washer mates with shaft keyway.
• Internal serrations of nut mates with external serrations of washer.
• Split ring engages internal nut groove for positive retention.
• Split ring is preassembled to serrated washer.
• Can be designed in various wrenching configurations.
• Free-running nut minimizes thread damage on mating part.
  
  

• Retrofit keyed washers where precise preload must be achieved.
• New designs where keying shafts is preferred over serrating shafts.
• Where achieving precise preload is critical.

SERRATIONS - CLEARANCE
Clearance fit is provided by Shur-lok Design.

THREAD SIZE
.500 inch and larger.

Metric sizes available on request.