ManLock


Limit Manhole Access with The ManLock


Secure your manhole cover to its frame with McGard’s ManLock high security lock bolts to keep out intruders. Simple yet effective manhole security by way of a patterned bolt head helps to prevent unwanted access to any manhole cover, drainage grate, steel access panel or hinged vault door.

Replace your existing manhole cover bolts or modify your ring and cover to accept our bolt. Terrorists don’t have a chance once you install these ultra high security locks.  The Intimidator ManLocks are used to satisfy the security requirements of the Federal Aviation Administration (FAA), the Federal Bureau of Prisons (FBOP) and many other military and government agency physical security  requirements.


  • Stainless steel heat treated to 150,000 psi minimum tensile strength

  • Controlled access using McGard’s unique patterned keys

  • Can be retrofitted to existing cast iron cover applications

  • Standard sizes fit all foundry product lines

  • Non-corrosive protective caps

  • Consult McGard for application information

Additional Resources:

ManLock Basic Product Information

ManLock Application Form

ManLock Installation-Conical Seat

ManLock Installation-Flat Seat