M10 to M125 • Spring steel • Mating pairs
Conical Wedge Lock Washer Pair Sizes Dimensions, geometry, spring properties and torque
This is a basic summary on each available Reliable Pressings Conical Wedge Lock Washer Pair size. For additional information, please do not hesitate to ask.
SPRING STEEL ONLY
Materials and Colour Key
All Conical Wedge Lock Washers are made from Spring Steel, 50CrV4 and 51CrMoV for thicker items, and SAE1075 for anything under 5 mm as the default base material. Remember that Conical Wedge Lock Washers come in mating pairs.
This 1-pager provides a summary of target preload, and required torque, by bolt size and bolt class, for a range of k-factors. Or work out your own with our bolt tightening torque calculator.
We have 8 colour coded sections for each product
- The product reference code
- Metric information
- Converted metric to imperial, or actual imperial size
- Data on anti-vibration geometry
- Data on anti-relaxation disc spring properties
- Related to 8.8 property class fasteners
- Related to 10.9 property class fasteners
- Related to 12.9 property class fasteners
Abbreviations and useful definitions
Please take note of the following abbreviations and useful information concerning each Bolt Size used in the tables below:
- Ref : This is the Reliable Pressings Identifier with the matching Metric or Imperial Bolt Size reference as a suffix.
- Di, De : Inner Diameter, Outer Diameter.
- T-pair : Material Thickness of the mated pair.
- t-single : Material Thickness of a single Conical Wedge Lock Washer.
- l0 : The unloaded overall height of a single Conical Wedge Lock Washer.
- h0/t : The ratio of the unloaded Cone Height (h0 = l0 − t) to material thickness.
- Pitch : The Coarse Std Thread Pitch of the Bolt to be used with the Conical Wedge Lock Washer, used to derive CAM height.
- Imperial : Dimensions of the converted Metric size or the actual Imperial Size in inches.
- # CAMS : The number of “wedges” that are on the inside surface and which mate with each other.
- Height of CAMS : The height in mm of a single CAM and is a function of CAM number and Coarse Std Pitch.
- # GRIPS : The number of elevated “wedges” that bite into the surface of the tightening assembly.
- Height of GRIPS : The height in mm of each GRIP.
- LoadFlat : The imposed load generated when the Conical Wedge Lock Washers are flattened and flush with each other.
- DeflFlat : The amount of deflection required when tightening the pair to make the opposing CAM surfaces flush with each other.
- σI : This value provides information on how the cone that creates the spring effect will last and be maintained.
- GF : Ratio of yield point. This is the preload achieved expressed as % of yield point. Generally around 70%.
QUALITY SPRING STEEL
Conical Wedge Lock Washer Pair Sizes
These dimensions pertain specifically to product made from Quality Spring Steel.
| Ref | Bolt | Metric | Imperial | For vibrations | For relaxation (s/h′0 = 100%, flat) | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Pitch [mm] | Di [mm] | De [mm] | T pair [mm] | t single [mm] | Bolt UNC | Di [in] | De [in] | T pair [in] | t single [in] | # CAMS | CAM height [mm] | CAM width @OD [mm] | # GRIPS | GRIP height [mm] | GRIP width @OD [mm] | l0 [mm] | h0/t | LoadFlat [N] | DeflFlat [mm] | σI [MPa] | ||
| CWLWP-10 | M10 | 1.5 | 10.5 | 17 | 3.2 | 1.6 | – | 0.41 | 0.67 | 0.13 | 0.063 | 18 | 0.7 | 3 | 40 | 0.1 | 1.3 | 1.8 | 0.13 | 4412 | 0.4 | -1646 |
| CWLWP-12 | M12 | 1.75 | 13 | 19.5 | 3.2 | 1.6 | – | 0.51 | 0.77 | 0.13 | 0.063 | 18 | 0.7 | 3.4 | 40 | 0.1 | 1.5 | 1.9 | 0.19 | 5576 | 0.6 | -2080 |
| CWLWP-14 | M14 | 2 | 15 | 23 | 3.2 | 1.6 | 9/16″ | 0.59 | 0.91 | 0.13 | 0.063 | 18 | 0.7 | 4 | 40 | 0.1 | 1.8 | 2 | 0.25 | 5172 | 0.8 | -1929 |
| CWLWP-16 | M16 | 2 | 17 | 25.4 | 3.2 | 1.6 | 5/8″ | 0.67 | 1 | 0.13 | 0.063 | 18 | 0.7 | 4.4 | 40 | 0.1 | 2 | 2.1 | 0.31 | 5511 | 1 | -2056 |
| CWLWP-18 | M18 | 2.5 | 19.5 | 28 | 4 | 2 | – | 0.77 | 1.1 | 0.16 | 0.079 | 24 | 0.7 | 3.7 | 60 | 0.1 | 1.5 | 2.4 | 0.2 | 7245 | 0.8 | -1730 |
| CWLWP-20 | M20 | 2.5 | 21.5 | 30.7 | 4 | 2 | – | 0.85 | 1.21 | 0.16 | 0.079 | 24 | 0.7 | 4 | 60 | 0.1 | 1.6 | 2.4 | 0.2 | 6109 | 0.8 | -1458 |
| CWLWP-22 | M22 | 2.5 | 23.5 | 34.5 | 5 | 2.5 | 7/8″ | 0.93 | 1.36 | 0.2 | 0.098 | 24 | 0.7 | 4.5 | 60 | 0.1 | 1.8 | 3 | 0.2 | 11 325 | 1 | -1730 |
| CWLWP-24 | M24 | 3 | 25.5 | 39 | 5 | 2.5 | – | 1 | 1.54 | 0.2 | 0.098 | 24 | 0.7 | 5.1 | 60 | 0.15 | 2 | 3 | 0.2 | 10 051 | 1 | -1536 |
| CWLWP-27 | M27 | 3 | 28.5 | 42 | 6 | 3 | – | 1.12 | 1.65 | 0.24 | 0.118 | 24 | 0.7 | 5.5 | 60 | 0.15 | 2.2 | 3.5 | 0.17 | 13 205 | 1 | -1401 |
| CWLWP-30 | M30 | 3.5 | 32 | 47 | 6 | 3 | 1 1/8″ | 1.26 | 1.85 | 0.24 | 0.118 | 24 | 0.7 | 6.2 | 60 | 0.15 | 2.5 | 3.7 | 0.23 | 14 525 | 1.4 | -1541 |
| CWLWP-33 | M33 | 3.5 | 34 | 48.5 | 6 | 3 | 1 1/4″ | 1.34 | 1.91 | 0.24 | 0.118 | 24 | 0.7 | 6.3 | 60 | 0.15 | 2.5 | 3.7 | 0.23 | 15 107 | 1.4 | -1603 |
| CWLWP-36 | M36 | 4 | 37 | 55 | 6 | 3 | 1 3/8″ | 1.46 | 2.17 | 0.24 | 0.118 | 24 | 0.7 | 7.2 | 60 | 0.2 | 2.9 | 4 | 0.33 | 15 621 | 2 | -1657 |
| CWLWP-39 | M39 | 4 | 41 | 58.5 | 6 | 3 | 1 1/2″ | 1.61 | 2.3 | 0.24 | 0.118 | 24 | 0.7 | 7.7 | 60 | 0.2 | 3.1 | 4.1 | 0.37 | 15 946 | 2.2 | -1692 |
| CWLWP-42 | M42 | 4.5 | 44 | 63 | 6 | 3 | – | 1.73 | 2.48 | 0.24 | 0.118 | 30 | 0.7 | 6.6 | 75 | 0.2 | 2.6 | 4.3 | 0.43 | 16 172 | 2.6 | -1716 |
| CWLWP-45 | M45 | 4.5 | 47 | 70 | 8 | 4 | 1 3/4″ | 1.85 | 2.76 | 0.31 | 0.157 | 30 | 0.7 | 7.3 | 75 | 0.2 | 2.9 | 4.9 | 0.23 | 20 171 | 1.8 | -1204 |
| CWLWP-48 | M48 | 5 | 50 | 75 | 8 | 4 | – | 1.97 | 2.95 | 0.31 | 0.157 | 30 | 0.7 | 7.9 | 75 | 0.2 | 3.1 | 5.1 | 0.28 | 21 268 | 2.2 | -1269 |
| CWLWP-52 | M52 | 5 | 52 | 80 | 8 | 4 | 2″ | 2.05 | 3.15 | 0.31 | 0.157 | 36 | 1 | 7 | 90 | 0.2 | 2.8 | 5.2 | 0.3 | 20 806 | 2.4 | -1292 |
| CWLWP-56 | M56 | 5.5 | 58 | 85 | 8 | 4 | 2 1/4″ | 2.28 | 3.35 | 0.31 | 0.157 | 36 | 1 | 7.4 | 90 | 0.3 | 3 | 5.3 | 0.33 | 20 336 | 2.6 | -1214 |
| CWLWP-60 | M60 | 5.5 | 62 | 90 | 8 | 4 | – | 2.44 | 3.54 | 0.31 | 0.157 | 36 | 1 | 7.9 | 90 | 0.3 | 3.1 | 5.5 | 0.38 | 22 194 | 3 | -1325 |
| CWLWP-64 | M64 | 6 | 66 | 95 | 8 | 4 | 2 1/2″ | 2.6 | 3.74 | 0.31 | 0.157 | 36 | 1 | 8.3 | 90 | 0.3 | 3.3 | 6.1 | 0.53 | 27 790 | 4.2 | -1061 |
| CWLWP-68 | M68 | 6 | 70 | 100 | 8 | 4 | – | 2.76 | 3.94 | 0.31 | 0.157 | 36 | 1 | 8.7 | 90 | 0.3 | 3.5 | 6.2 | 0.55 | 30 067 | 4.4 | -1148 |
| CWLWP-72 | M72 | 6 | 74 | 105 | 8 | 4 | – | 2.91 | 4.13 | 0.31 | 0.157 | 36 | 1.3 | 9.2 | 90 | 0.4 | 3.7 | 6.3 | 0.58 | 28 600 | 4.6 | -2650 |
| CWLWP-76 | M76 | 6 | 78 | 110 | 8 | 4 | 3″ | 3.07 | 4.33 | 0.31 | 0.157 | 36 | 1.3 | 9.6 | 90 | 0.5 | 3.8 | 6.4 | 0.6 | 29 200 | 4.8 | -2700 |
| CWLWP-80 | M80 | 6 | 82 | 115 | 8 | 4 | – | 3.23 | 4.53 | 0.31 | 0.157 | 36 | 1.3 | 10 | 90 | 0.5 | 4 | 6.5 | 0.63 | 23 515 | 5 | -2165 |
| CWLWP-85 | M85 | 6 | 88 | 120 | 8 | 4 | – | 3.46 | 4.72 | 0.31 | 0.157 | 36 | 1.3 | 10.5 | 90 | 0.5 | 4.2 | 8.2 | 1.05 | 32 300 | 8.4 | -1600 |
| CWLWP-90 | M90 | 6 | 92 | 130 | 8 | 4 | – | 3.62 | 5.12 | 0.31 | 0.157 | 36 | 1.3 | 11.3 | 90 | 0.5 | 4.5 | 8.2 | 1.05 | 29 000 | 8.4 | -1500 |
| CWLWP-95 | M95 | 6 | 97 | 135 | 8 | 4 | – | 3.82 | 5.31 | 0.31 | 0.157 | 36 | 1.3 | 11.8 | 90 | 0.5 | 4.7 | 8.4 | 1.1 | 30 000 | 8.8 | -1650 |
| CWLWP-100 | M100 | 6 | 103 | 145 | 8 | 4 | 4″ | 4.06 | 5.71 | 0.31 | 0.157 | 36 | 1.3 | 12.7 | 90 | 0.5 | 5.1 | 8.5 | 1.13 | 31 000 | 9 | -1750 |
| CWLWP-105 | M105 | 6 | 108 | 150 | 8 | 4 | – | 4.25 | 5.91 | 0.31 | 0.157 | 36 | 1.3 | 13.1 | 90 | 0.5 | 5.2 | 8.6 | 1.15 | 31 000 | 9.2 | -1750 |
| CWLWP-110 | M110 | 6 | 113 | 155 | 8 | 4 | – | 4.45 | 6.1 | 0.31 | 0.157 | 36 | 1.3 | 13.5 | 90 | 0.5 | 5.4 | 8 | 1 | 21 700 | 8 | -1850 |
| CWLWP-115 | M115 | 6 | 118 | 165 | 8 | 4 | – | 4.65 | 6.5 | 0.31 | 0.157 | 36 | 1.3 | 14.4 | 90 | 0.5 | 5.8 | 8.6 | 1.15 | 32 500 | 9.2 | -1950 |
| CWLWP-120 | M120 | 6 | 123 | 170 | 8 | 4 | – | 4.84 | 6.69 | 0.31 | 0.157 | 36 | 1.3 | 14.8 | 90 | 0.5 | 5.9 | 8.8 | 1.2 | 33 100 | 9.6 | -2000 |
| CWLWP-125 | M125 | 8 | 128 | 173 | 8 | 4 | 5″ | 5.04 | 6.81 | 0.31 | 0.157 | 36 | 1.3 | 15.1 | 90 | 0.5 | 6 | 8.9 | 1.23 | 34 300 | 9.8 | -2100 |
8.8, 10.9 AND 12.9 BOLTS
Preload and Tightening Torque
The torque needed to reach the listed preload with each lubrication regime (T = k · F · d). Need a different preload, bolt class or k-factor? Use the bolt tightening torque calculator.
| Ref | Bolt | 8.8 bolts | 10.9 bolts | 12.9 bolts | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Preload [kN] | Well lubricated k = 0.153 [Nm] | Some lubrication k = 0.206 [Nm] | No lubrication k = 0.258 [Nm] | Preload [kN] | Well lubricated k = 0.153 [Nm] | Some lubrication k = 0.206 [Nm] | No lubrication k = 0.258 [Nm] | Preload [kN] | Well lubricated k = 0.153 [Nm] | Some lubrication k = 0.206 [Nm] | No lubrication k = 0.258 [Nm] | ||
| CWLWP-10 | M10 | 26.9 | 41.2 | 55.4 | 69.4 | 38.5 | 58.9 | 79.3 | 99.3 | 45.0 | 68.9 | 92.7 | 116.1 |
| CWLWP-12 | M12 | 39.1 | 71.8 | 96.7 | 121.1 | 56.0 | 102.8 | 138.4 | 173.4 | 65.4 | 120.1 | 161.7 | 202.5 |
| CWLWP-14 | M14 | 53.4 | 114.4 | 154.0 | 192.9 | 76.4 | 163.6 | 220.3 | 276.0 | 89.2 | 191.1 | 257.3 | 322.2 |
| CWLWP-16 | M16 | 72.8 | 178.2 | 239.9 | 300.5 | 104.2 | 255.1 | 343.4 | 430.1 | 121.8 | 298.2 | 401.5 | 502.8 |
| CWLWP-18 | M18 | 92.2 | 253.9 | 341.9 | 428.2 | 127.2 | 350.3 | 471.7 | 590.7 | 149.0 | 410.3 | 552.5 | 692.0 |
| CWLWP-20 | M20 | 117.6 | 359.9 | 484.5 | 606.8 | 162.4 | 496.9 | 669.1 | 838.0 | 190.1 | 581.7 | 783.2 | 980.9 |
| CWLWP-22 | M22 | 145.5 | 489.8 | 659.4 | 825.9 | 201.6 | 678.6 | 913.7 | 1 144.3 | 235.2 | 791.7 | 1 065.9 | 1 335.0 |
| CWLWP-24 | M24 | 169.4 | 622.0 | 837.5 | 1 048.9 | 234.4 | 860.7 | 1 158.9 | 1 451.4 | 273.8 | 1 005.4 | 1 353.7 | 1 695.4 |
| CWLWP-27 | M27 | 220.2 | 909.6 | 1 224.8 | 1 533.9 | 304.8 | 1 259.1 | 1 695.3 | 2 123.2 | 356.2 | 1 471.5 | 1 981.2 | 2 481.3 |
| CWLWP-30 | M30 | 269.4 | 1 236.5 | 1 664.9 | 2 085.2 | 372.8 | 1 711.2 | 2 303.9 | 2 885.5 | 435.2 | 1 997.6 | 2 689.5 | 3 368.4 |
| CWLWP-33 | M33 | 333.3 | 1 682.8 | 2 265.8 | 2 837.7 | 456.0 | 2 302.3 | 3 099.9 | 3 882.4 | 538.4 | 2 718.4 | 3 660.0 | 4 583.9 |
| CWLWP-36 | M36 | 392.0 | 2 159.1 | 2 907.1 | 3 640.9 | 542.4 | 2 987.5 | 4 022.4 | 5 037.8 | 634.0 | 3 492.1 | 4 701.7 | 5 888.6 |
| CWLWP-39 | M39 | 468.8 | 2 797.3 | 3 766.3 | 4 717.1 | 648.0 | 3 866.6 | 5 206.0 | 6 520.2 | 757.6 | 4 520.6 | 6 086.6 | 7 623.0 |
| CWLWP-42 | M42 | 537.6 | 3 454.6 | 4 651.3 | 5 825.4 | 743.7 | 4 779.0 | 6 434.5 | 8 058.7 | 869.1 | 5 584.8 | 7 519.5 | 9 417.6 |
| CWLWP-45 | M45 | 628.8 | 4 329.3 | 5 829.0 | 7 300.4 | 869.8 | 5 988.6 | 8 063.0 | 10 098.4 | 1 016.6 | 6 999.3 | 9 423.9 | 11 802.7 |
| CWLWP-48 | M48 | 705.6 | 5 181.9 | 6 977.0 | 8 738.2 | 976.1 | 7 168.5 | 9 651.7 | 12 088.0 | 1 140.7 | 8 377.3 | 11 279.2 | 14 126.4 |
| CWLWP-52 | M52 | 844.8 | 6 721.2 | 9 049.5 | 11 333.8 | 1 168.6 | 9 297.4 | 12 518.0 | 15 677.9 | 1 365.8 | 10 866.3 | 14 630.4 | 18 323.6 |
| CWLWP-56 | M56 | 974.4 | 8 348.7 | 11 240.7 | 14 078.1 | 1 347.9 | 11 548.8 | 15 549.4 | 19 474.5 | 1 575.3 | 13 497.2 | 18 172.7 | 22 759.9 |
| CWLWP-60 | M60 | 1 132.8 | 10 399.1 | 14 001.4 | 17 535.7 | 1 567.0 | 14 385.1 | 19 368.1 | 24 257.2 | 1 831.4 | 16 812.3 | 22 636.1 | 28 350.1 |
| CWLWP-64 | M64 | 1 286.4 | 12 596.4 | 16 959.9 | 21 241.0 | 1 779.5 | 17 424.9 | 23 460.9 | 29 383.1 | 2 079.7 | 20 364.4 | 27 418.8 | 34 340.0 |
| CWLWP-68 | M68 | 1 468.8 | 15 281.4 | 20 575.0 | 25 768.6 | 2 031.8 | 21 138.8 | 28 461.5 | 35 645.9 | 2 374.6 | 24 705.3 | 33 263.4 | 41 660.0 |
| CWLWP-72 | M72 | 1 646.4 | 18 136.7 | 24 419.4 | 30 583.5 | 2 277.5 | 25 088.9 | 33 779.9 | 42 306.8 | 2 661.7 | 29 321.3 | 39 478.3 | 49 443.7 |
| CWLWP-76 | M76 | 1 851.8 | 21 532.7 | 28 991.8 | 36 310.1 | 2 561.7 | 29 787.4 | 40 106.0 | 50 229.8 | 2 993.8 | 34 811.9 | 46 870.9 | 58 702.4 |
| CWLWP-80 | M80 | 2 069.3 | 25 328.2 | 34 102.1 | 42 710.4 | 2 862.5 | 35 037.0 | 47 174.0 | 59 082.0 | 3 345.3 | 40 946.5 | 55 130.5 | 69 047.0 |
| CWLWP-85 | M85 | 2 357.8 | 30 663.2 | 41 285.1 | 51 706.6 | 3 261.6 | 42 417.1 | 57 110.6 | 71 526.9 | 3 811.7 | 49 571.2 | 66 742.9 | 83 590.6 |
| CWLWP-90 | M90 | 2 665.4 | 36 702.6 | 49 416.5 | 61 890.6 | 3 687.2 | 50 772.7 | 68 360.7 | 85 616.8 | 4 309.1 | 59 336.3 | 79 890.7 | 100 057.3 |
| CWLWP-95 | M95 | 2 991.8 | 43 485.8 | 58 549.5 | 73 329.0 | 4 138.7 | 60 156.0 | 80 994.4 | 101 439.5 | 4 836.8 | 70 302.9 | 94 656.2 | 118 550.0 |
| CWLWP-100 | M100 | 3 337.0 | 51 056.1 | 68 742.2 | 86 094.6 | 4 616.1 | 70 626.3 | 95 091.7 | 119 095.4 | 5 394.8 | 82 540.4 | 111 132.9 | 139 185.8 |
| CWLWP-105 | M105 | 3 701.3 | 59 461.4 | 80 059.1 | 100 268.2 | 5 120.1 | 82 254.4 | 110 747.8 | 138 703.5 | 5 983.7 | 96 128.1 | 129 427.4 | 162 098.4 |
| CWLWP-110 | M110 | 4 084.3 | 68 738.8 | 92 550.2 | 115 912.4 | 5 650.0 | 95 089.5 | 128 029.0 | 160 347.0 | 6 603.0 | 111 128.5 | 149 624.0 | 187 393.1 |
| CWLWP-115 | M115 | – | – | – | – | – | – | – | – | – | – | – | – |
| CWLWP-120 | M120 | – | – | – | – | – | – | – | – | – | – | – | – |
| CWLWP-125 | M125 | – | – | – | – | – | – | – | – | – | – | – | – |
Need a size that is not listed?
If you need anything larger, or a size that is not on our list, we are only too happy to help.