Profile Home


Stanley Engineered Fastening - Spiralock


The Edge is in the Wedge!

Spiralock is a technologically superior fastening system ideally suited for threaded joint applications subjected to heavy shock and vibration, extreme temperatures, long hours of strenuous operation, and millions of loading cycles without the opportunity for retightening. Our proprietary internal thread form features a unique 30° wedge ramp at the root of the thread that locks the bolt securely in the threaded joint, offering the following benefits:

  • Superior resistance to vibration loosening
  • Improved joint integrity
  • More evenly distributed load
  • Consistent, repeated reusability
  • Elimination of secondary locking devices

Spiralock products include flange nuts, self-clinching nuts, tanged and Drive Notch™ (tang-free) wire thread inserts, threaded inserts, threading inserts, taps and gages, and thread milling cutters as well as a variety of custom-made products that meet our customers’ needs.

Product Catalog

Milling Cutters
(36 Products)
(285 Products)
(4 Products)
Thread Mills
(36 Products)
Threaded Inserts
(209 Products)

Service Catalog

Stanley Engineered Fastening - Spiralock is listed in these service categories:

Technical Articles

Aerospace Industry Turns to Innovative Fastener Thread to Keep the Mission from Falling Apart (Fastening and Joining) Extreme shock, G-force, vibration, and temperature cycles assault every jet, rocket, and spacecraft repeatedly during thousands of hours of operational use. True mission success depends on how... (View Full Article)
Domestic and International Railway Manufacturers Combat Stress and Vibration with Innovative Fastener Thread Form (Fastening and Joining) Whether the challenge is getting a bearing adapter to reliably withstand tremendous force in a U.S. locomotive bogie frame, retrofitting Chinese track to handle a doubling of train speed, or cutting... (View Full Article)

Featured Video

Supplier Announcements
Stanley Engineered Fastening - Spiralock
Stanley Engineered Fastening - Spiralock
Stanley Engineered Fastening - Spiralock