34 products

PN Series Precision Locknuts – Inch

The PN series is the precision inch locknut: the clamping face is ground square to the thread axis to a tight runout tolerance, so tightening the nut applies preload evenly around the bearing race instead of cocking it. That squareness is what keeps a precision spindle running true. PN nuts lock with a PW series precision lockwasher.

PN Series Specifications

  • Part numbers: PN-00 through PN-44 (34 sizes stocked)
  • Bore / shaft size: 0.391 in to 7.847 in
  • Outside diameter: 0.75 in to 9.844 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

Machine tool and grinding spindles, high-speed motor and turbine rotors, instrument drives and any bearing seat where runout and preload accuracy govern performance.

Related Whittet-Higgins Series

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.
  • Whittet-Higgins PL-18 Precision Locknut – 3.527-12 thread, 4.656in OD Whittet-Higgins PL-18 Precision Locknut – 3.527-12 thread, 4.656in OD
    $9.06
    $9.06
  • Whittet-Higgins PL-18 Precision Locknut – 3.527-12 thread, 4.656in OD Whittet-Higgins PL-18 Precision Locknut – 3.527-12 thread, 4.656in OD
    $7.88
    $7.88
  • Whittet-Higgins PN-44 Precision Locknut Whittet-Higgins PN-44 Precision Locknut
    $588.08
    $588.08
  • Whittet-Higgins PL-18 Precision Locknut – 3.527-12 thread, 4.656in OD Whittet-Higgins PN-40 Precision Locknut – 7.847-8 thread, 9.844in OD
    $432.45
    $432.45
  • Whittet-Higgins PL-18 Precision Locknut – 3.527-12 thread, 4.656in OD Whittet-Higgins PN-38 Precision Locknut – 7.472-8 thread, 9.469in OD
    $397.21
    $397.21
  • Whittet-Higgins PL-18 Precision Locknut – 3.527-12 thread, 4.656in OD Whittet-Higgins PN-36 Precision Locknut – 7.066-8 thread, 9.063in OD
    $312.41
    $312.41
  • Whittet-Higgins PL-18 Precision Locknut – 3.527-12 thread, 4.656in OD Whittet-Higgins PN-34 Precision Locknut – 6.659-8 thread, 8.656in OD
    $263.36
    $263.36
  • Whittet-Higgins PL-18 Precision Locknut – 3.527-12 thread, 4.656in OD Whittet-Higgins PN-32 Precision Locknut – 6.284-8 thread, 8.063in OD
    $222.36
    $222.36
  • Whittet-Higgins PL-18 Precision Locknut – 3.527-12 thread, 4.656in OD Whittet-Higgins PN-30 Precision Locknut – 5.888-12 thread, 7.688in OD
    $186.58
    $186.58
  • Whittet-Higgins PL-18 Precision Locknut – 3.527-12 thread, 4.656in OD Whittet-Higgins PN-28 Precision Locknut – 5.497-12 thread, 7.094in OD
    $157.43
    $157.43
  • Whittet-Higgins PL-18 Precision Locknut – 3.527-12 thread, 4.656in OD Whittet-Higgins PN-26 Precision Locknut – 5.106-12 thread, 6.75in OD
    $128.50
    $128.50
  • Whittet-Higgins PL-18 Precision Locknut – 3.527-12 thread, 4.656in OD Whittet-Higgins PN-24 Precision Locknut – 4.716-12 thread, 6.125in OD
    $106.21
    $106.21
  • Whittet-Higgins PL-18 Precision Locknut – 3.527-12 thread, 4.656in OD Whittet-Higgins PN-22 Precision Locknut – 4.325-12 thread, 5.719in OD
    $88.25
    $88.25
  • Whittet-Higgins PL-18 Precision Locknut – 3.527-12 thread, 4.656in OD Whittet-Higgins PN-21 Precision Locknut – 4.122-12 thread, 5.438in OD
    $77.94
    $77.94
  • Whittet-Higgins PL-18 Precision Locknut – 3.527-12 thread, 4.656in OD Whittet-Higgins PN-20 Precision Locknut – 3.918-12 thread, 5.188in OD
    $68.64
    $68.64
  • Whittet-Higgins PL-18 Precision Locknut – 3.527-12 thread, 4.656in OD Whittet-Higgins PN-19 Precision Locknut – 3.730-12 thread, 4.938in OD
    $59.11
    $59.11
  • Whittet-Higgins PL-18 Precision Locknut – 3.527-12 thread, 4.656in OD Whittet-Higgins PN-18 Precision Locknut – 3.527-12 thread, 4.656in OD
    $55.09
    $55.09
  • Whittet-Higgins PL-18 Precision Locknut – 3.527-12 thread, 4.656in OD Whittet-Higgins PL-18 Precision Locknut – 3.527-12 thread, 4.656in OD
    $48.15
    $48.15
  • Whittet-Higgins PL-18 Precision Locknut – 3.527-12 thread, 4.656in OD Whittet-Higgins PL-18 Precision Locknut – 3.527-12 thread, 4.656in OD
    $43.99
    $43.99
  • Whittet-Higgins PL-18 Precision Locknut – 3.527-12 thread, 4.656in OD Whittet-Higgins PL-18 Precision Locknut – 3.527-12 thread, 4.656in OD
    $37.16
    $37.16
  • Whittet-Higgins PL-18 Precision Locknut – 3.527-12 thread, 4.656in OD Whittet-Higgins PL-18 Precision Locknut – 3.527-12 thread, 4.656in OD
    $29.21
    $29.21
  • Whittet-Higgins PL-18 Precision Locknut – 3.527-12 thread, 4.656in OD Whittet-Higgins PL-18 Precision Locknut – 3.527-12 thread, 4.656in OD
    $24.55
    $24.55
  • Whittet-Higgins PL-18 Precision Locknut – 3.527-12 thread, 4.656in OD Whittet-Higgins PL-18 Precision Locknut – 3.527-12 thread, 4.656in OD
    $21.84
    $21.84
  • Whittet-Higgins PL-18 Precision Locknut – 3.527-12 thread, 4.656in OD Whittet-Higgins PL-18 Precision Locknut – 3.527-12 thread, 4.656in OD
    $18.04
    $18.04
  • Whittet-Higgins PL-18 Precision Locknut – 3.527-12 thread, 4.656in OD Whittet-Higgins PL-18 Precision Locknut – 3.527-12 thread, 4.656in OD
    $15.27
    $15.27
  • Whittet-Higgins PL-18 Precision Locknut – 3.527-12 thread, 4.656in OD Whittet-Higgins PL-18 Precision Locknut – 3.527-12 thread, 4.656in OD
    $12.56
    $12.56
  • Whittet-Higgins PL-18 Precision Locknut – 3.527-12 thread, 4.656in OD Whittet-Higgins PL-18 Precision Locknut – 3.527-12 thread, 4.656in OD
    $11.00
    $11.00
  • Whittet-Higgins PN-065 Precision Locknut Whittet-Higgins PN-065 Precision Locknut
    $10.24
    $10.24
  • Whittet-Higgins PL-18 Precision Locknut – 3.527-12 thread, 4.656in OD Whittet-Higgins PL-18 Precision Locknut – 3.527-12 thread, 4.656in OD
    $7.09
    $7.09
  • Whittet-Higgins PL-18 Precision Locknut – 3.527-12 thread, 4.656in OD Whittet-Higgins PL-18 Precision Locknut – 3.527-12 thread, 4.656in OD
    $6.68
    $6.68
  • Whittet-Higgins PL-18 Precision Locknut – 3.527-12 thread, 4.656in OD Whittet-Higgins PL-18 Precision Locknut – 3.527-12 thread, 4.656in OD
    $6.25
    $6.25
  • Whittet-Higgins PL-18 Precision Locknut – 3.527-12 thread, 4.656in OD Whittet-Higgins PL-18 Precision Locknut – 3.527-12 thread, 4.656in OD
    $5.88
    $5.88
  • Whittet-Higgins PL-18 Precision Locknut – 3.527-12 thread, 4.656in OD Whittet-Higgins PL-18 Precision Locknut – 3.527-12 thread, 4.656in OD
    $4.47
    $4.47
  • Whittet-Higgins PL-18 Precision Locknut – 3.527-12 thread, 4.656in OD Whittet-Higgins PL-18 Precision Locknut – 3.527-12 thread, 4.656in OD
    $5.05
    $5.05