Checkpoint CLY33 Checklink Wheel nut indicator and retainer - Yellow 1 5/16 in (33 mm) (Bag of 50 pcs)


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Checkpoint CLY33 Checklink Wheel nut indicator and retainer - Yellow 1 5/16 in (33 mm) (Bag of 50 pcs)

Placing a Checklink across two adjacent wheel nuts helps to prevent the loosening of wheel nuts. This clever product both indicates and retains against unwanted wheel nut movement as well as indicating any overheating of wheels caused by faulty brakes or bearings. Connecting two adjacent wheel nuts with our specialist polymer in our distinctive ‘S’ shape provides a retaining function, causing resistance to the loosening of wheel nuts. If the wheel nut still manages to loosen, this will be indicated by the distortion of ‘S’ shape.

The Checklink wheel nut indicator provides a clear commitment to health and safety, and roadworthiness to other road users, commercial vehicles, and road and transportation associations such as: DfT, FORS, DVSA, HSE, FTA and RHA.

Checkpoint products contain a Bio Additive that has been validated by independent ASTM D5511 tests to yield enhanced biodegradation in Landfill Conditions, saving the planet from over 200 tonnes of plastic waste each year.

Features and Benefits

  • A dual-purpose wheel nut indicator and retainer.
  • A visual indicator of wheel nut movement.
  • Helps prevent loosening of wheel nuts.
  • Indicates possible faults with breaks or bearings through melting.
  • Melts at a specific temperature of 125ºC/257ºF
  • Supports fleet safety checks.
  • The world's first biodegradable wheel nut indicators.


  • Materials: High-grade virgin polymer to ensure product quality and performance reliability for overheating indication.

Warranty Information


Martins Industries warrants to the original purchaser that its products are free from defects in material and workmanship. This coverage is valid for a period of 6 months to 3 years, depending on the product, starting from the billing date. The warranty will be voided if the product has sustained damage due to misuse, improper assembly, poor maintenance, any accident or any non-authorized modifications / repairs.

Any other information please call us up at 800-562-4791.