Actual product may vary.
SK
The SK Series locknuts utilize the elasticity of the steel body itself, axial locking, and forced locking. With locking capabilities more than three times higher compared to traditional locknuts, this series is aimed at harsh working conditions where locknuts are easily loosened.
| Material Composition： | DIN 42CrMo4 / JIS SCM440 / AISI 4140 |
| Hardness： | HRC28° ~32° |
| Thread Precision： | ISO 4H |
| Manufacturing Method： | High Precision Turning Run Out M6~M200：0.005mm Run Out M210~M300：0.007mm |
| Type & Pitch | D | h | d | n-Øb | P.D.C c | Screw n-M×L | Screw Torque [Nm] | Axial Load Static [kN] | Weight [kg] |
|---|---|---|---|---|---|---|---|---|---|
| SK-M12×1.0P | 26 | 15 | 25 | 3-Ø3 | 19 | 3-M3×10 | 2.5 | 39 | - |
| SK-M14×1.5P | 32 | 16 | - | 4-Ø4 | 22.5 | 3-M4×10 | 3.5 | 51 | - |
| SK-M15×1.5P | 33 | 18 | 30 | 4-Ø4 | 24 | 4-M4×12 | 3.5 | 57 | 0.08 |
| SK-M16×1.5P | 34 | 18 | 31 | 4-Ø4 | 24 | 4-M4×12 | 3.5 | 65 | 0.08 |
| SK-M17×1.0P | 37 | 18 | 34 | 4-Ø4 | 26 | 4-M4×12 | 3.5 | 75 | 0.096 |
| SK-M18×1.5P | 38 | 18 | 35 | 4-Ø4 | 28 | 4-M4×12 | 3.5 | 75 | 0.097 |
| SK-M20×1.0P | 40 | 18 | 37 | 4-Ø4 | 30 | 4-M4×12 | 3.5 | 87 | 0.103 |
| SK-M20×1.5P | 40 | 18 | 37 | 4-Ø4 | 30 | 4-M4×12 | 3.5 | 84 | 0.104 |
| SK-M22×1.5P | 42 | 18 | 39 | 4-Ø4 | 32 | 4-M4×12 | 3.5 | 96 | 0.11 |
| SK-M24×1.5P | 44 | 18 | 41 | 4-Ø4 | 34 | 4-M4×12 | 3.5 | 105 | 0.177 |
| SK-M25×1.5P | 45 | 20 | 42 | 4-Ø5 | 35 | 4-M4×14 | 3.5 | 140 | 0.13 |
| SK-M26×1.5P | 45 | 20 | 42 | 4-Ø5 | 35 | 4-M4×14 | 3.5 | 147 | 0.125 |
| SK-M27×1.5P | 46 | 20 | 43 | 4-Ø5 | 37 | 4-M4×14 | 3.5 | 153 | 0.138 |
| SK-M28×1.5P | 46 | 20 | 43 | 4-Ø5 | 37 | 4-M4×14 | 3.5 | 153 | 0.13 |
| SK-M30×1.5P | 48 | 20 | 45 | 4-Ø5 | 39 | 4-M4×14 | 3.5 | 171 | 0.136 |
| SK-M32×1.5P | 50 | 22 | 47 | 4-Ø5 | 41 | 4-M4×16 | 3.5 | 192 | 0.145 |
| SK-M33×1.5P | 50 | 22 | 47 | 4-Ø5 | 41 | 4-M4×16 | 3.5 | 192 | 0.156 |
| SK-M35×1.5P | 53 | 22 | 50 | 4-Ø5 | 44 | 4-M4×16 | 3.5 | 198 | 0.165 |
| SK-M36×1.5P | 54 | 22 | 51 | 4-Ø5 | 44 | 4-M4×16 | 3.5 | 198 | 0.16 |
| SK-M38×1.5P | 56 | 22 | 53 | 4-Ø5 | 47 | 4-M4×16 | 3.5 | 198 | 0.18 |
| SK-M39×1.5P | 56 | 22 | 53 | 4-Ø5 | 47 | 4-M4×16 | 3.5 | 225 | 0.192 |
| SK-M40×1.5P | 58 | 22 | 55 | 4-Ø5 | 49 | 4-M4×16 | 3.5 | 198 | 0.18 |
| SK-M42×1.5P | 60 | 22 | 57 | 4-Ø5 | 51 | 4-M4×16 | 3.5 | 198 | 0.175 |
| SK-M45×1.5P | 68 | 22 | 65 | 6-Ø6 | 57 | 6-M4×18 | 3.5 | 252 | 0.266 |
| SK-M48×1.5P | 69 | 25 | 66 | 6-Ø6 | 58 | 6-M4×18 | 3.5 | 282 | 0.295 |
| SK-M50×1.5P | 70 | 25 | 67 | 6-Ø6 | 60 | 6-M4×18 | 3.5 | 282 | 0.288 |
| SK-M52×1.5P | 72 | 25 | 68 | 6-Ø6 | 62 | 6-M4×18 | 3.5 | 288 | 0.295 |
| SK-M55×1.5P | 75 | 25 | 71 | 6-Ø6 | 65 | 6-M4×18 | 3.5 | 288 | 0.307 |
| SK-M55×2.0P | 75 | 25 | 71 | 6-Ø6 | 65 | 6-M4×18 | 3.5 | 288 | 0.307 |
| SK-M56×1.5P | 75 | 25 | 71 | 6-Ø6 | 65 | 6-M4×18 | 3.5 | 288 | 0.3 |
| SK-M58×1.5P | 82 | 26 | 78 | 6-Ø6 | 70 | 6-M5×20 | 4.5 | 372 | 0.42 |
| SK-M60×1.5P | 84 | 26 | 80 | 6-Ø6 | 72 | 6-M5×20 | 4.5 | 394 | 0.436 |
| SK-M60×2.0P | 84 | 26 | 80 | 6-Ø6 | 72 | 6-M5×20 | 4.5 | 394 | 0.441 |
| SK-M62×1.5P | 86 | 28 | 82 | 6-Ø6 | 75 | 6-M5×20 | 4.5 | 409 | 0.493 |
| SK-M64×1.5P | 86 | 28 | 84 | 6-Ø6 | 75 | 6-M5×20 | 4.5 | 409 | 0.49 |
| SK-M64×2.0P | 86 | 28 | 84 | 6-Ø6 | 75 | 6-M5×20 | 4.5 | 409 | 0.492 |
| SK-M65×1.5P | 88 | 28 | 84 | 6-Ø6 | 77 | 6-M5×20 | 4.5 | 438 | 0.476 |
| SK-M65×2.0P | 88 | 28 | 84 | 6-Ø6 | 80 | 6-M5×20 | 4.5 | 438 | 0.478 |
| SK-M68×2.0P | 93 | 28 | 89 | 6-Ø7 | 82 | 6-M5×20 | 4.5 | 705 | 0.554 |
| SK-M70×1.5P | 95 | 28 | 91 | 6-Ø7 | 82 | 6-M5×20 | 4.5 | 515 | 0.543 |
| SK-M70×2.0P | 95 | 28 | 91 | 6-Ø7 | 82 | 6-M5×20 | 4.5 | 515 | 0.573 |
| SK-M72×1.5P | 97 | 28 | 93 | 6-Ø7 | 84 | 6-M5×20 | 4.5 | 520 | 0.59 |
| SK-M72×2.0P | 97 | 28 | 93 | 6-Ø7 | 84 | 6-M5×20 | 4.5 | 520 | 0.592 |
| SK-M75×1.5P | 100 | 28 | 96 | 6-Ø7 | 87 | 6-M5×20 | 4.5 | 525 | 0.613 |
| SK-M75×2.0P | 100 | 28 | 96 | 6-Ø7 | 87 | 6-M5×20 | 4.5 | 525 | 0.614 |
| SK-M80×2.0P | 110 | 32 | 105 | 6-Ø8 | 95 | 6-M6×22 | 8 | 530 | 0.93 |
| SK-M85×2.0P | 115 | 32 | 110 | 6-Ø8 | 100 | 6-M6×22 | 8 | 540 | 0.9 |
| SK-M90×2.0P | 120 | 32 | 115 | 6-Ø8 | 105 | 6-M6×22 | 8 | 571 | 1.01 |
| SK-M95×2.0P | 125 | 32 | 120 | 6-Ø8 | 110 | 6-M6×22 | 8 | 600 | 1.05 |
| SK-M100×2.0P | 130 | 32 | 125 | 6-Ø8 | 115 | 6-M6×22 | 8 | 618 | 1.103 |
| SK-M105×2.0P | 135 | 32 | 130 | 6-Ø8 | 120 | 6-M6×22 | 8 | 656 | 1.205 |
| SK-M110×2.0P | 140 | 32 | 135 | 6-Ø8 | 125 | 6-M6×22 | 8 | 768 | 1.183 |
| SK-M115×2.0P | 145 | 34 | 140 | 6-Ø8 | 130 | 6-M6×22 | 8 | 768 | 1.393 |
| SK-M120×2.0P | 155 | 36 | 150 | 6-Ø8 | 136 | 6-M6×25 | 8 | 880 | 1.82 |
| SK-M125×2.0P | 160 | 36 | 155 | 6-Ø8 | 140 | 6-M6×25 | 8 | 860 | 1.873 |
| SK-M130×2.0P | 165 | 36 | 160 | 6-Ø8 | 148 | 6-M6×25 | 8 | 900 | 1.949 |
| SK-M140×2.0P | 180 | 38 | 173 | 8-Ø10 | 160 | 8-M6×25 | 8 | 930 | 2.47 |
| SK-M140×3.0P | 180 | 38 | 173 | 8-Ø10 | 160 | 8-M6×25 | 8 | 930 | 2.47 |
| SK-M150×2.0P | 190 | 38 | 184 | 8-Ø10 | 170 | 8-M6×25 | 8 | 940 | 2.8 |
| SK-M150×3.0P | 190 | 38 | 184 | 8-Ø10 | 170 | 8-M6×25 | 8 | 950 | 2.811 |
| SK-M160×3.0P | 205 | 40 | 199 | 8-Ø10 | 178 | 8-M8×30 | 18 | 1020 | 3.55 |
| SK-M170×3.0P | 215 | 40 | 209 | 8-Ø10 | 193 | 8-M8×30 | 18 | 1075 | 3.7 |
| SK-M180×3.0P | 230 | 40 | 224 | 8-Ø10 | 205 | 8-M8×30 | 18 | 1200 | 4.415 |
| SK-M190×3.0P | 240 | 40 | 234 | 8-Ø10 | 215 | 8-M8×30 | 18 | 1250 | 4.603 |
| SK-M200×3.0P | 245 | 40 | 239 | 8-Ø10 | 223 | 8-M8×30 | 18 | 1390 | 4.242 |
| SK-M210×3.0P | 255 | 42 | 249 | 8-Ø10 | 232 | 8-M8×30 | 18 | 1500 | 4.361 |
| SK-M220×3.0P | 260 | 42 | 254 | 8-Ø10 | 240 | 8-M8×30 | 18 | 1685 | 4.67 |
| SK-M230×3.0P | 270 | 42 | 264 | 8-Ø10 | 250 | 8-M8×30 | 18 | 1720 | 5.012 |
| SK-M240×3.0P | 280 | 42 | 274 | 8-Ø10 | 260 | 8-M8×30 | 18 | 1875 | 5.341 |
| SK-M250×3.0P | 290 | 42 | 284 | 8-Ø10 | 270 | 8-M8×30 | 18 | 1980 | 5.504 |
| SK-M260×4.0P | 300 | 43 | 294 | 8-Ø12 | 280 | 8-M10×30 | 35 | 2050 | 5.752 |
| SK-M270×4.0P | 310 | 43 | 300 | 8-Ø12 | 290 | 8-M10×30 | 35 | 2100 | 5.95 |
| SK-M280×4.0P | 320 | 43 | 310 | 8-Ø12 | 300 | 8-M10×30 | 35 | 2130 | 6.153 |
| SK-M290×4.0P | 330 | 43 | 320 | 8-Ø12 | 310 | 8-M10×30 | 35 | 2250 | 6.407 |
| SK-M300×4.0P | 340 | 43 | 330 | 8-Ø12 | 320 | 8-M10×30 | 35 | 2325 | 6.51 |
| 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: SA-25×1.5P-L ‧ To prevent the locknuts are in short supply, please send your order in advance. ‧ Subject to technical changes. |
