Stanley Engineered Fastening now incorporates its self-locking Spiralock internal thread form design, which reportedly has superior resistance against self-loosening when exposed to harsh environments involving significant shock, extreme vibration, and drastic thermal cycling, into key locking threaded inserts.

Spiralock Threaded Nuts

Stanley Engineered Fastening offers its unique self-locking Spiralock thread form, which is reportedly highly resistant to shock, vibration, and temperature induced loosening, in a full range of corrosion-resistant, stainless steel, fractional and metric hex flange nuts.

Spiralock Thread Form Taps

Machinists can now add a locking feature to tapped holes by utilizing specialized Spiralock taps from Stanley Engineered Fastening optimized for extended tool life in high volume CNC operations.