Tri Groove security nuts feature a tapered diameter, making the nuts resistant to gripping devices. Security nuts are installed using a special Tri Groove socket, which grips the indentations along the outside of the fastener to turn the nut along a thread. Tri Groove nuts are also referred to as T Groove, Trident Drive and Coned Trident Drive Nuts.
Tamper Proof Nuts below are corrosion resistant 316 stainless steel, making the fasteners suitable for long term applications in harsh environments. Common applications of 316 stainless steel fasteners include use on boats, docks, piers, and pools.