Actual product may vary.
SR
The SR Series Precision locknuts employ 3-point radial locking. Thickness is comparatively thinner than other products. This series is especially applicable for use when locknut space is limited. Aside from where other products are not usable due to space restrictions.
⚠️ Not applicable for installations where radial set screws cannot be tightened due to space constraints.
| Material Composition： | DIN 42CrMo4 / JIS SCM440 / AISI 4140 |
| Hardness： | HRC28° ~32° |
| Thread Precision： | ISO 4H |
| Manufacturing Method： | High Precision Grinding Run Out M6~M200：0.002mm |
| High Precision Turning Run Out M6~M200：0.005mm Run Out M210~M300：0.007mm Run Out M310~M450：0.008mm |
| Type & Pitch | D | h | d | n×g | t | Screw n-m | Screw Torque [Nm] | Axial Load Static [kN] | Weight [kg] |
|---|---|---|---|---|---|---|---|---|---|
| SR-M5×0.5P | 16 | 8 | 11 | 4×3 | 2 | 2-M4 | 3.5 | 17 | 0.01 |
| SR-M6×0.5P | 16 | 8 | 11 | 4×3 | 2 | 2-M4 | 3.5 | 17 | 0.01 |
| SR-M8×0.75P | 16 | 8 | 11 | 4×3 | 2 | 2-M4 | 3.5 | 23 | 0.008 |
| SR-M8×1.0P | 16 | 8 | 11 | 4×3 | 2 | 2-M4 | 3.5 | 23 | 0.008 |
| SR-M9×0.75P | 18 | 8 | 13 | 4×3 | 2 | 2-M4 | 3.5 | 31 | 0.01 |
| SR-M10×0.75P | 18 | 8 | 13 | 4×3 | 2 | 2-M4 | 3.5 | 31 | 0.01 |
| SR-M10×1.0P | 18 | 8 | 13 | 4×3 | 2 | 2-M4 | 3.5 | 31 | 0.01 |
| SR-M12×1.0P | 20 | 8 | 16 | 4×3 | 2 | 2-M4 | 3.5 | 38 | 0.012 |
| SR-M12×1.0P-22 | 22 | 8 | 18 | 4×3 | 2 | 2-M4 | 3.5 | 38 | 0.015 |
| SR-M12×1.25P | 20 | 8 | 16 | 4×3 | 2 | 2-M4 | 3.5 | 38 | 0.012 |
| SR-M12×1.25P-22 | 22 | 8 | 18 | 4×3 | 2 | 2-M4 | 3.5 | 38 | 0.015 |
| SR-M14×1.5P | 25 | 8 | 20 | 4×3 | 2 | 2-M4 | 3.5 | 50 | 0.02 |
| SR-M15×1.0P | 25 | 8 | 20 | 4×3 | 2 | 2-M4 | 3.5 | 50 | 0.019 |
| SR-M16×1.5P | 28 | 10 | 23 | 4×4 | 2 | 2-M5 | 4.5 | 57 | 0.03 |
| SR-M17×1.0P | 28 | 10 | 23 | 4×4 | 2 | 2-M5 | 4.5 | 57 | 0.028 |
| SR-M18×1.5P | 30 | 10 | 25 | 4×4 | 2 | 2-M5 | 4.5 | 62 | 0.034 |
| SR-M20×1.0P | 32 | 10 | 27 | 4×4 | 2 | 3-M5 | 4.5 | 69 | 0.035 |
| SR-M20×1.5P | 32 | 10 | 27 | 4×4 | 2 | 3-M5 | 4.5 | 69 | 0.036 |
| SR-M22×1.5P | 35 | 10 | 30 | 4×4 | 2 | 3-M5 | 4.5 | 81 | 0.044 |
| SR-M24×1.5P | 38 | 12 | 33 | 4×5 | 2 | 3-M6 | 8 | 90 | 0.06 |
| SR-M25×1.5P | 38 | 12 | 33 | 4×5 | 2 | 3-M6 | 8 | 90 | 0.056 |
| SR-M27×1.5P | 42 | 12 | 37 | 4×5 | 2 | 3-M6 | 8 | 98 | 0.073 |
| SR-M30×1.0P | 45 | 12 | 40 | 4×5 | 2 | 3-M6 | 8 | 112 | 0.068 |
| SR-M30×1.5P | 45 | 12 | 40 | 4×5 | 2 | 3-M6 | 8 | 112 | 0.068 |
| SR-M33×1.5P | 52 | 12 | 46 | 4×6 | 2.5 | 3-M6 | 8 | 134 | 0.074 |
| SR-M35×1.5P | 52 | 12 | 46 | 4×6 | 2.5 | 3-M6 | 8 | 134 | 0.116 |
| SR-M36×1.5P | 52 | 12 | 46 | 4×6 | 2.5 | 3-M6 | 8 | 143 | 0.132 |
| SR-M38×1.5P | 58 | 14 | 52 | 4×6 | 2.5 | 3-M6 | 8 | 157 | 0.154 |
| SR-M39×1.5P | 58 | 14 | 52 | 4×6 | 2.5 | 3-M6 | 8 | 157 | 0.154 |
| SR-M40×1.5P | 58 | 14 | 52 | 4×6 | 2.5 | 3-M6 | 8 | 157 | 0.146 |
| SR-M42×1.5P | 62 | 14 | 56 | 4×6 | 2.5 | 3-M6 | 8 | 176 | 0.172 |
| SR-M45×1.5P | 65 | 14 | 59 | 4×6 | 2.5 | 3-M6 | 8 | 181 | 0.183 |
| SR-M48×1.5P | 68 | 14 | 62 | 4×6 | 2.5 | 3-M6 | 8 | 193 | 0.196 |
| SR-M50×1.5P | 70 | 14 | 64 | 4×6 | 2.5 | 3-M8 | 18 | 205 | 0.199 |
| SR-M50×2.0P | 70 | 14 | 64 | 4×6 | 2.5 | 3-M8 | 18 | 205 | 0.199 |
| SR-M52×1.5P | 73 | 16 | 66 | 4×8 | 3 | 3-M8 | 18 | 213 | 0.251 |
| SR-M55×2.0P | 75 | 16 | 68 | 4×8 | 3 | 3-M8 | 18 | 229 | 0.246 |
| SR-M56×1.5P | 75 | 16 | 68 | 4×8 | 3 | 3-M8 | 18 | 240 | 0.241 |
| SR-M56×2.0P | 75 | 16 | 68 | 4×8 | 3 | 3-M8 | 18 | 240 | 0.241 |
| SR-M60×1.5P | 80 | 16 | 73 | 4×8 | 3 | 3-M8 | 18 | 240 | 0.265 |
| SR-M60×2.0P | 80 | 16 | 73 | 4×8 | 3 | 3-M8 | 18 | 255 | 0.266 |
| SR-M62×2.0P | 83 | 16 | 76 | 4×8 | 3 | 3-M8 | 18 | 255 | 0.266 |
| SR-M64×1.5P | 85 | 16 | 78 | 4×8 | 3 | 3-M8 | 18 | 280 | 0.303 |
| SR-M64×2.0P | 85 | 16 | 78 | 4×8 | 3 | 3-M8 | 18 | 280 | 0.303 |
| SR-M65×2.0P | 85 | 16 | 78 | 4×8 | 3 | 3-M8 | 18 | 280 | 0.29 |
| SR-M68×2.0P | 92 | 18 | 84 | 4×8 | 3.5 | 3-M8 | 18 | 305 | 0.412 |
| SR-M70×2.0P | 92 | 18 | 84 | 4×8 | 3.5 | 3-M8 | 18 | 305 | 0.382 |
| SR-M72×2.0P | 94 | 18 | 86 | 4×8 | 3.5 | 3-M8 | 18 | 320 | 0.393 |
| SR-M75×2.0P | 98 | 18 | 90 | 4×8 | 3.5 | 3-M8 | 18 | 331 | 0.429 |
| SR-M76×2.0P | 100 | 18 | 92 | 4×8 | 3.5 | 3-M8 | 18 | 342 | 0.461 |
| SR-M80×2.0P | 105 | 18 | 96 | 4×8 | 3.5 | 3-M8 | 18 | 355 | 0.5 |
| SR-M85×2.0P | 110 | 18 | 102 | 4×8 | 3.5 | 3-M8 | 18 | 385 | 0.53 |
| SR-M90×2.0P | 120 | 20 | 108 | 4×10 | 4 | 3-M8 | 18 | 410 | 0.724 |
| SR-M95×2.0P | 125 | 20 | 113 | 4×10 | 4 | 3-M8 | 18 | 450 | 0.79 |
| SR-M100×2.0P | 130 | 20 | 118 | 4×10 | 4 | 3-M8 | 18 | 465 | 0.826 |
| SR-M105×2.0P | 140 | 22 | 125 | 4×12 | 5 | 3-M10 | 35 | 495 | 1.081 |
| SR-M110×2.0P | 145 | 22 | 132 | 4×12 | 5 | 3-M10 | 35 | 520 | 1.147 |
| SR-M115×2.0P | 150 | 22 | 137 | 4×12 | 5 | 3-M10 | 35 | 550 | 1.227 |
| SR-M120×2.0P | 155 | 24 | 142 | 4×12 | 5 | 3-M10 | 35 | 580 | 1.375 |
| SR-M125×2.0P | 160 | 24 | 147 | 4×12 | 5 | 3-M10 | 35 | 610 | 1.389 |
| SR-M130×2.0P | 165 | 24 | 152 | 4×12 | 5 | 3-M10 | 35 | 630 | 1.476 |
| SR-M130×3.0P | 165 | 24 | 152 | 4×12 | 5 | 3-M10 | 35 | 630 | 1.476 |
| SR-M135×2.0P | 175 | 26 | 160 | 4×14 | 6 | 3-M10 | 35 | 670 | 1.912 |
| SR-M140×2.0P | 178 | 26 | 165 | 4×14 | 6 | 3-M12 | 60 | 690 | 1.892 |
| SR-M145×2.0P | 190 | 26 | 175 | 4×14 | 6 | 3-M12 | 60 | 720 | 2.36 |
| SR-M150×2.0P | 195 | 26 | 180 | 4×14 | 6 | 3-M12 | 60 | 750 | 2.436 |
| SR-M155×3.0P | 200 | 28 | 180 | 4×16 | 7 | 3-M12 | 60 | 830 | 2.685 |
| SR-M160×3.0P | 210 | 28 | 190 | 4×16 | 7 | 3-M12 | 60 | 980 | 3.18 |
| SR-M165×3.0P | 210 | 28 | 190 | 4×16 | 7 | 3-M12 | 60 | 1030 | 2.814 |
| SR-M170×3.0P | 220 | 28 | 200 | 4×16 | 7 | 3-M12 | 60 | 1130 | 3.12 |
| SR-M180×3.0P | 230 | 30 | 205 | 4×18 | 8 | 3-M12 | 60 | 1300 | 3.642 |
| SR-M190×3.0P | 240 | 30 | 215 | 4×18 | 8 | 3-M12 | 60 | 1470 | 3.885 |
| SR-M195×3.0P | 240 | 30 | 215 | 4×18 | 8 | 3-M12 | 60 | 1470 | 3.7 |
| SR-M200×3.0P | 250 | 32 | 225 | 4×18 | 8 | 3-M12 | 60 | 1600 | 4.326 |
| SR-M210×3.0P | 260 | 32 | 240 | 4×18 | 8 | 3-M12 | 60 | 2000 | 4.63 |
| SR-M220×3.0P | 270 | 32 | 250 | 4×18 | 8 | 3-M12 | 60 | 2050 | 4.85 |
| SR-M230×3.0P | 280 | 34 | 258 | 4×20 | 9 | 3-M12 | 60 | 2100 | 4.985 |
| SR-M240×3.0P | 290 | 34 | 268 | 4×20 | 9 | 3-M12 | 60 | 2200 | 5.4 |
| SR-M250×3.0P | 300 | 34 | 278 | 4×20 | 9 | 3-M12 | 60 | 2300 | 5.83 |
| SR-M260×4.0P | 310 | 34 | 288 | 4×22 | 10 | 3-M14 | 100 | 2400 | 5.16 |
| SR-M270×4.0P | 320 | 34 | 298 | 4×22 | 10 | 3-M14 | 100 | 2500 | 5.5 |
| SR-M280×4.0P | 330 | 34 | 308 | 6×22 | 10 | 3-M14 | 100 | 2650 | 6.107 |
| SR-M290×4.0P | 340 | 36 | 315 | 6×24 | 11 | 3-M14 | 100 | 2700 | 6.613 |
| SR-M300×4.0P | 350 | 36 | 325 | 6×24 | 11 | 3-M14 | 100 | 2800 | 7.148 |
| SR-M310×4.0P | 365 | 36 | 340 | 6×24 | 12 | 3-M14 | 100 | _ | _ |
| SR-M320×4.0P | 375 | 36 | 350 | 6×24 | 12 | 3-M14 | 100 | _ | _ |
| SR-M330×4.0P | 385 | 36 | 360 | 6×24 | 12 | 3-M14 | 100 | _ | _ |
| SR-M340×4.0P | 395 | 36 | 370 | 6×24 | 12 | 3-M14 | 100 | _ | _ |
| SR-M350×4.0P | 405 | 36 | 380 | 6×24 | 12 | 3-M14 | 100 | _ | _ |
| SR-M360×4.0P | 415 | 38 | 388 | 6×26 | 13 | 3-M16 | 150 | _ | _ |
| SR-M370×4.0P | 425 | 38 | 398 | 6×26 | 13 | 3-M16 | 150 | _ | _ |
| SR-M380×4.0P | 435 | 38 | 408 | 6×26 | 13 | 3-M16 | 150 | _ | _ |
| SR-M390×4.0P | 445 | 38 | 418 | 6×26 | 13 | 3-M16 | 150 | _ | _ |
| SR-M400×4.0P | 465 | 38 | 438 | 6×30 | 13 | 3-M16 | 150 | _ | _ |
| SR-M410×4.0P | 475 | 40 | 444 | 6×30 | 15 | 3-M16 | 150 | _ | _ |
| SR-M420×4.0P | 485 | 40 | 454 | 6×30 | 15 | 3-M16 | 150 | _ | _ |
| SR-M430×4.0P | 495 | 40 | 464 | 6×30 | 15 | 3-M16 | 150 | _ | _ |
| SR-M440×4.0P | 505 | 40 | 474 | 6×30 | 15 | 3-M16 | 150 | _ | _ |
| SR-M450×4.0P | 515 | 40 | 484 | 6×30 | 15 | 3-M16 | 150 | _ | _ |
| Remarks: ‧ All dimensions in mm. ‧ SAK could custom standard, nonstandard and special nuts, size from M5 ~ M1000 and with a varity of materials. ‧ If left hand thread required, please notify “L” after the Type & Pitch. For example: SR-25×1.5P-L ‧ To prevent the locknuts are in short supply, please send your order in advance. ‧ Subject to technical changes. |
