![[THK] — RN Lock Nut (for Ball Screw Shaft and Bearing)](https://prosourcemro.com/wp-content/uploads/2026/05/001-899-1024x1024.png)
Ball Screws
THK
[THK] — RN Lock Nut (for Ball Screw Shaft and Bearing)
Family ID: THK-RN-LOCK-NUT
THK RN Series Lock Nut for ball screw shaft and bearing. Anti-loosening mechanism via hex socket set screw and set piece. Shaft thread range M4~M40. Simple and reliable shaft/bearing retention.
13 product codes available in this family
Product Codes & Specifications
| Product Code | Description | Brand | Spec | ||
|---|---|---|---|---|---|
| RN4 | THK RN4, Lock Nut M4×0.5 | THK | 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 | THK | 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 | THK | 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 | THK | 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 | THK | 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 | THK | 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 | THK | 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 | THK | 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 | THK | 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 | THK | 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 | THK | 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 | THK | 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 | THK | 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) |
