19 products
NT Series Bearing Locknuts – Inch, Small Profile
The NT series is the reduced-profile inch bearing locknut. It carries the same shaft thread as a standard N nut of the same size but in a shorter, smaller-diameter body, which buys back axial and radial clearance at a crowded bearing seat. NT nuts lock with WT series small-profile lockwashers and are driven with BAST small-profile assembly sockets.
NT Series Specifications
- Part numbers: NT-00 through NT-18 (19 sizes stocked)
- Bore / shaft size: 0.391 in to 3.527 in
- Outside diameter: 0.719 in to 4.312 in
- Material & temperature: Carbon steel, black oxide finish; 300°F maximum operating temperature
- Standards: ANSI/ABMA 8.2-1999; made in USA, RoHS compliant
Applications
Compact gearboxes, pillow block and cartridge assemblies, servo and stepper drives, and retrofit work where a standard locknut will not clear an adjacent housing, seal or shoulder.
Related Whittet-Higgins Series
- W-000 / WT Series Bearing Lockwashers – Small Profile
- PT Series Precision Locknuts – Small Profile
- BASI / BAST Series Bearing Assembly Sockets – 16 TPI & Small Profile
- N-000 Series Bearing Locknuts – Large Bore, Small Profile
- N / AN Series Bearing Locknuts – Inch, SAE
Apollo is an authorized Whittet-Higgins distributor. Every part on this page is genuine Whittet-Higgins, manufactured in the USA. Need a size that is not listed, or help matching a locknut to its lockwasher and assembly socket? Contact our team.

