US Part Number: 27740
Canada Part Number: 27740

Permatex® Large Diameter Threadlocker RED


OEM specified. A high strength adhesive for locking and sealing large bolts and stud 1″ (25mm+) or larger in diameter. Heat may be required to weaken bond before parts can be disassembled. Conforms to ASTM D5363 AN0211 (Mil-S-46163A, Type I, Grade L).



Suggested Applications: Frame brackets, suspension fasteners, shock absorber mounts, wheel studs.

US Item # CDN Item # Container Size Case
277402774036 ml bottle, carded 6
US Item # Tech Doc File
27740 TDS  SDS  Canada part # SDS


  1. Clean and dry parts using Permatex® Surface Prep™ activator.
  2. Apply Large Diameter Threadlocker to both parts (threaded areas) and assemble.Refer to Technical Data Sheet for complete information.

NOTE: Large Diameter Threadlocker works on metal parts. It is not recommended for plastics. Cured Large Diameter Threadlocker must be heated to 500°F (260°C) before parts will separate.

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