• THK RN Lock Nut (for Ball Screw Shaft and Bearing)
1 1

THK RN Lock Nut (for Ball Screw Shaft and Bearing)

THK RN Lock Nut (for Ball Screw Shaft and Bearing)

THK RN Series Lock Nut for ball screw shaft and bearing.

Key features

  • Anti-loosening mechanism via hex socket set screw and set piece
  • Shaft thread range M4~M40
  • Simple and reliable shaft/bearing retention

Specifications

Type Lock Nut with Anti-loosening Set Screw (RN)
RN4 THK RN4, Lock Nut M4×0.5 | Shaft Thread M: M4×0.5 | Set Screw m: M2.6 | OD D: 11.5mm | Bore d: 8mm | Length L: 5mm | Groove Depth t: 2.7mm | Across Flats T: 10mm | Mass: 0.003kg | Type: Lock Nut with Anti-loosening Set Screw (RN)
RN5 THK RN5, Lock Nut M5×0.5 | Shaft Thread M: M5×0.5 | Set Screw m: M2.6 | OD D: 13.5mm | Bore d: 9mm | Length L: 5mm | Groove Depth t: 2.7mm | Across Flats T: 11mm | Mass: 0.004kg | Type: Lock Nut with Anti-loosening Set Screw (RN)
RN6 THK RN6, Lock Nut M6×0.75 | Shaft Thread M: M6×0.75 | Set Screw m: M3 | OD D: 14.5mm | Bore d: 10mm | Length L: 5mm | Groove Depth t: 2.7mm | Across Flats T: 12mm | Mass: 0.005kg | Type: Lock Nut with Anti-loosening Set Screw (RN)
RN8 THK RN8, Lock Nut M8×1 | Shaft Thread M: M8×1 | Set Screw m: M3 | OD D: 17.0mm | Bore d: 13mm | Length L: 6.5mm | Groove Depth t: 4mm | Across Flats T: 14mm | Mass: 0.008kg | Type: Lock Nut with Anti-loosening Set Screw (RN)
RN10 THK RN10, Lock Nut M10×1 | Shaft Thread M: M10×1 | Set Screw m: M3 | OD D: 20.0mm | Bore d: 15mm | Length L: 8mm | Groove Depth t: 5.5mm | Across Flats T: 16mm | Mass: 0.013kg | Type: Lock Nut with Anti-loosening Set Screw (RN)
RN12 THK RN12, Lock Nut M12×1 | Shaft Thread M: M12×1 | Set Screw m: M3 | OD D: 22.0mm | Bore d: 17mm | Length L: 8mm | Groove Depth t: 5.5mm | Across Flats T: 19mm | Mass: 0.014kg | Type: Lock Nut with Anti-loosening Set Screw (RN)
RN15 THK RN15, Lock Nut M15×1 | Shaft Thread M: M15×1 | Set Screw m: M3 | OD D: 25.0mm | Bore d: 21mm | Length L: 8mm | Groove Depth t: 4.5mm | Across Flats T: 22mm | Mass: 0.017kg | Type: Lock Nut with Anti-loosening Set Screw (RN)
RN17 THK RN17, Lock Nut M17×1 | Shaft Thread M: M17×1 | Set Screw m: M4 | OD D: 30.0mm | Bore d: 25mm | Length L: 13mm | Groove Depth t: 9mm | Across Flats T: 24mm | Mass: 0.042kg | Type: Lock Nut with Anti-loosening Set Screw (RN)
RN20 THK RN20, Lock Nut M20×1 | Shaft Thread M: M20×1 | Set Screw m: M4 | OD D: 35.0mm | Bore d: 26mm | Length L: 11mm | Groove Depth t: 7mm | Across Flats T: 30mm | Mass: 0.048kg | Type: Lock Nut with Anti-loosening Set Screw (RN)
RN25 THK RN25, Lock Nut M25×1.5 | Shaft Thread M: M25×1.5 | Set Screw m: M5 | OD D: 43.0mm | Bore d: 33mm | Length L: 15mm | Groove Depth t: 10mm | Across Flats T: 35mm | Mass: 0.096kg | Type: Lock Nut with Anti-loosening Set Screw (RN)
RN30 THK RN30, Lock Nut M30×1.5 | Shaft Thread M: M30×1.5 | Set Screw m: M6 | OD D: 48.0mm | Bore d: 39mm | Length L: 20mm | Groove Depth t: 14mm | Across Flats T: 40mm | Mass: 0.145kg | Type: Lock Nut with Anti-loosening Set Screw (RN)
RN35 THK RN35, Lock Nut M35×1.5 | Shaft Thread M: M35×1.5 | Set Screw m: M8 | OD D: 60.0mm | Bore d: 46mm | Length L: 21mm | Groove Depth t: 14mm | Across Flats T: 50mm | Mass: 0.261kg | Type: Lock Nut with Anti-loosening Set Screw (RN)
RN40 THK RN40, Lock Nut M40×1.5 | Shaft Thread M: M40×1.5 | Set Screw m: M8 | OD D: 63.0mm | Bore d: 51mm | Length L: 25mm | Groove Depth t: 18mm | Across Flats T: 50mm | Mass: 0.304kg | Type: Lock Nut with Anti-loosening Set Screw (RN)
Ball ScrewsTHK
13 product codes available in this family
Sourced direct from KoreaExport-ready supplyCompetitive pricing
RFQ List 0 Email about this

Need a different model, or a part not listed here? Send us your parts list →

THK RN Lock Nut (for Ball Screw Shaft and Bearing)

Brand THK·Ball Screws

Available part numbers (13)

RN4, RN5, RN6, RN8, RN10, RN12, RN15, RN17, RN20, RN25 + 3 more — see full table ↓

How to order

Send the THK part numbers and quantities through our RFQ form or to info@prosourcemro.com. We confirm price, availability and lead time within 1 business day — no account needed.

RFQ List 0 →
View full details
Product codes & specifications
0 selected
RFQ List (0)
Product codeSpec
RN4THK RN4, Lock Nut M4×0.5 | Shaft Thread M: M4×0.5 | Set Screw m: M2.6 | OD D: 11.5mm | Bore d: 8mm | Length L: 5mm | Groove Depth t: 2.7mm | Across Flats T: 10mm | Mass: 0.003kg | Type: Lock Nut with Anti-loosening Set Screw (RN)
RN5THK RN5, Lock Nut M5×0.5 | Shaft Thread M: M5×0.5 | Set Screw m: M2.6 | OD D: 13.5mm | Bore d: 9mm | Length L: 5mm | Groove Depth t: 2.7mm | Across Flats T: 11mm | Mass: 0.004kg | Type: Lock Nut with Anti-loosening Set Screw (RN)
RN6THK RN6, Lock Nut M6×0.75 | Shaft Thread M: M6×0.75 | Set Screw m: M3 | OD D: 14.5mm | Bore d: 10mm | Length L: 5mm | Groove Depth t: 2.7mm | Across Flats T: 12mm | Mass: 0.005kg | Type: Lock Nut with Anti-loosening Set Screw (RN)
RN8THK RN8, Lock Nut M8×1 | Shaft Thread M: M8×1 | Set Screw m: M3 | OD D: 17.0mm | Bore d: 13mm | Length L: 6.5mm | Groove Depth t: 4mm | Across Flats T: 14mm | Mass: 0.008kg | Type: Lock Nut with Anti-loosening Set Screw (RN)
RN10THK RN10, Lock Nut M10×1 | Shaft Thread M: M10×1 | Set Screw m: M3 | OD D: 20.0mm | Bore d: 15mm | Length L: 8mm | Groove Depth t: 5.5mm | Across Flats T: 16mm | Mass: 0.013kg | Type: Lock Nut with Anti-loosening Set Screw (RN)
RN12THK RN12, Lock Nut M12×1 | Shaft Thread M: M12×1 | Set Screw m: M3 | OD D: 22.0mm | Bore d: 17mm | Length L: 8mm | Groove Depth t: 5.5mm | Across Flats T: 19mm | Mass: 0.014kg | Type: Lock Nut with Anti-loosening Set Screw (RN)
RN15THK RN15, Lock Nut M15×1 | Shaft Thread M: M15×1 | Set Screw m: M3 | OD D: 25.0mm | Bore d: 21mm | Length L: 8mm | Groove Depth t: 4.5mm | Across Flats T: 22mm | Mass: 0.017kg | Type: Lock Nut with Anti-loosening Set Screw (RN)
RN17THK RN17, Lock Nut M17×1 | Shaft Thread M: M17×1 | Set Screw m: M4 | OD D: 30.0mm | Bore d: 25mm | Length L: 13mm | Groove Depth t: 9mm | Across Flats T: 24mm | Mass: 0.042kg | Type: Lock Nut with Anti-loosening Set Screw (RN)
RN20THK RN20, Lock Nut M20×1 | Shaft Thread M: M20×1 | Set Screw m: M4 | OD D: 35.0mm | Bore d: 26mm | Length L: 11mm | Groove Depth t: 7mm | Across Flats T: 30mm | Mass: 0.048kg | Type: Lock Nut with Anti-loosening Set Screw (RN)
RN25THK RN25, Lock Nut M25×1.5 | Shaft Thread M: M25×1.5 | Set Screw m: M5 | OD D: 43.0mm | Bore d: 33mm | Length L: 15mm | Groove Depth t: 10mm | Across Flats T: 35mm | Mass: 0.096kg | Type: Lock Nut with Anti-loosening Set Screw (RN)
RN30THK RN30, Lock Nut M30×1.5 | Shaft Thread M: M30×1.5 | Set Screw m: M6 | OD D: 48.0mm | Bore d: 39mm | Length L: 20mm | Groove Depth t: 14mm | Across Flats T: 40mm | Mass: 0.145kg | Type: Lock Nut with Anti-loosening Set Screw (RN)
RN35THK RN35, Lock Nut M35×1.5 | Shaft Thread M: M35×1.5 | Set Screw m: M8 | OD D: 60.0mm | Bore d: 46mm | Length L: 21mm | Groove Depth t: 14mm | Across Flats T: 50mm | Mass: 0.261kg | Type: Lock Nut with Anti-loosening Set Screw (RN)
RN40THK RN40, Lock Nut M40×1.5 | Shaft Thread M: M40×1.5 | Set Screw m: M8 | OD D: 63.0mm | Bore d: 51mm | Length L: 25mm | Groove Depth t: 18mm | Across Flats T: 50mm | Mass: 0.304kg | Type: Lock Nut with Anti-loosening Set Screw (RN)

Need a different model, or a part not listed here? Send us your parts list →

Related products

All Linear Motion & Bearings →