Tri-Groove Security Nuts
Tri-groove security nuts are installed, removed and reused with a special wrench that permits access to recessed mountings or deep channels.
They can be used when there is no access to the fastening from the side.
These nuts are the original 1018 case-hardened steel tri groove nuts that cannot be shattered with a hammer blow like many zinc die-cast nuts.
Be sure to order a socket for each size security nut you need. The smaller TGSS socket works with both the #10 or 1/4" Tri-groove nut, while the larger TGSM works on 5/16" or 3/8" Tri-groove nuts.
If you need a driver for the nut sockets, we offer a hand driver (TGD38) and power drill adapter (TGDA38). All of the nut sockets will fit standard 3/8" drivers.