ASME B18.8.8M Clevis Pins
ASME B18.8.8M Dimensions of Type A and B Headed Clevis Pins
| D | Dk | K | E | R | t1 | t2 | Dp | D1 | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Shank Diameter | Head Diameter | Head Height | Head Chamfer or Radius |
Fillet Radius |
Bearing Surface |
Head Periphery Circular Runout |
Point Diameter |
Hole Diameter |
|||||||
| Basic | Max | Min | Max | Min | Max | Min | Approx | Nom | Max | Max | Max | Min | Nom | Max | Min |
| 3 | 3.00 | 2.94 | 5.00 | 4.70 | 1.2 | 0.8 | 0.5 | 0.6 | 0.14 | 0.60 | 2.2 | 1.8 | 0.8 | 0.94 | 0.80 |
| 4 | 4.000 | 3.925 | 6.00 | 5.70 | 1.2 | 0.8 | 0.5 | 0.6 | 0.17 | 0.60 | 3.2 | 2.8 | 1 | 1.14 | 1.00 |
| 5 | 5.000 | 4.925 | 8.00 | 7.64 | 1.8 | 1.4 | 1 | 0.6 | 0.22 | 0.72 | 3.3 | 2.7 | 1.2 | 1.34 | 1.20 |
| 6 | 6.000 | 5.925 | 10.0 | 9.64 | 2.2 | 1.8 | 1 | 0.6 | 0.28 | 0.72 | 4.3 | 3.7 | 1.6 | 1.74 | 1.60 |
| 8 | 8.00 | 7.91 | 14.00 | 13.57 | 3.2 | 2.8 | 1 | 0.6 | 0.39 | 0.86 | 6.3 | 5.7 | 2 | 2.14 | 2.00 |
| 10 | 10.00 | 9.91 | 18.00 | 17.57 | 4.2 | 3.8 | 1 | 0.6 | 0.50 | 0.86 | 8.3 | 7.7 | 3 | 3.38 | 3.20 |
| 12 | 12.00 | 11.90 | 20.00 | 19.48 | 4.2 | 3.8 | 1.5 | 0.6 | 0.56 | 1.04 | 9.5 | 8.5 | 3 | 3.38 | 3.20 |
| 14 | 14.00 | 13.90 | 22.00 | 21.48 | 4.2 | 3.8 | 1.5 | 0.5 | 0.61 | 1.04 | 11.5 | 10.5 | 4 | 4.18 | 4.00 |
| 16 | 16.00 | 15.90 | 25.00 | 24.48 | 4.7 | 4.3 | 1.5 | 0.6 | 0.70 | 1.04 | 13.5 | 12.5 | 4 | 4.18 | 4.00 |
| 18 | 18.00 | 17.90 | 28.00 | 27.48 | 5.2 | 4.8 | 1.5 | 1 | 0.78 | 1.04 | 15.5 | 14.5 | 5 | 5.18 | 5.00 |
| 20 | 20.00 | 19.87 | 30.00 | 29.48 | 5.2 | 4.8 | 2 | 1 | 0.84 | 1.04 | 16.6 | 15.4 | 5 | 5.18 | 5.00 |
| 22 | 22.00 | 21.87 | 33.00 | 32.38 | 5.7 | 5.3 | 2 | 1 | 0.92 | 1.24 | 18.6 | 17.4 | 5 | 5.18 | 5.00 |
| 24 | 24.00 | 23.87 | 36.00 | 35.38 | 6.2 | 5.8 | 2 | 1 | 1.01 | 1.24 | 20.6 | 19.4 | 6.3 | 6.52 | 6.30 |
| 27 | 27.00 | 26.87 | 40.00 | 39.38 | 6.2 | 5.8 | 2 | 1 | 1.12 | 1.24 | 23.6 | 22.4 | 6.3 | 6.52 | 6.30 |
| 30 | 30.00 | 29.87 | 44.00 | 43.38 | 8.3 | 7.7 | 2 | 1 | 1.23 | 1.24 | 26.6 | 25.4 | 8 | 8.22 | 8.00 |
| 33 | 33.00 | 32.84 | 47.00 | 46.38 | 8.3 | 7.7 | 2 | 1 | 1.31 | 1.24 | 29.6 | 28.4 | 8 | 8.22 | 8.00 |
| 36 | 36.00 | 35.84 | 50.00 | 49.38 | 8.3 | 7.7 | 2 | 1 | 1.40 | 1.24 | 32.6 | 31.4 | 8 | 8.22 | 8.00 |
| 40 | 40.00 | 39.84 | 55.00 | 54.26 | 8.3 | 7.7 | 2 | 1 | 0.77 | 1.48 | 36.6 | 35.4 | 8 | 8.22 | 8.00 |
| 45 | 45.00 | 44.84 | 60.00 | 59.26 | 9.3 | 8.7 | 2 | 1 | 0.84 | 1.48 | 41.6 | 40.4 | 10 | 10.22 | 10.00 |
| 50 | 50.00 | 49.84 | 66.00 | 65.26 | 9.3 | 8.7 | 2 | 1 | 0.92 | 1.48 | 46.6 | 45.4 | 10 | 10.22 | 10.00 |
| 55 | 55.00 | 54.81 | 72.00 | 71.26 | 11.4 | 10.6 | 3 | 1 | 1.01 | 1.48 | 50.0 | 48.0 | 10 | 10.22 | 10.00 |
| 60 | 60.00 | 59.81 | 78.00 | 77.26 | 12.4 | 11.6 | 3 | 1 | 1.09 | 1.48 | 55.0 | 53.0 | 10 | 13.27 | 10.00 |
| 70 | 70.00 | 69.31 | 90.00 | 89.13 | 13.4 | 12.6 | 3 | 1 | 1.26 | 1.74 | 65.0 | 63.0 | 13 | 13.27 | 13.00 |
| 80 | 80.00 | 79.81 | 100.0 | 99.13 | 13.4 | 12.6 | 3 | 1 | 1.40 | 1.74 | 75.0 | 73.0 | 13 | 13.27 | 13.00 |
| 90 | 90.00 | 89.78 | 110.00 | 109.13 | 13.4 | 12.6 | 3 | 1 | 1.54 | 1.74 | 85.0 | 83.0 | 13 | 13.27 | 13.00 |
| 100 | 100.00 | 99.78 | 120.00 | 119.13 | 13.4 | 12.6 | 3 | 1 | 1.68 | 1.74 | 95.0 | 93.0 | 13 | 13.27 | 13.00 |
| See para. 2.1 | 2.2.1 | 2.2.2 | 2.2.3 | 2.4 | 2.5 | ||||||||||
Hole Location
| d Nom Dia. |
3 | 4 | 5 | 6 | 8 | 10 | 12 | 14 | 16 | 18 | 20 | 22 | 24 | 27 | 30 | 33 | 36 | 40 | 45 | 50 | 55 | 60 | 70 | 80 | 90 | 100 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| L Nom Length |
Ln Nominal Head to Hole Center (See Para. 2.6.1) |
|||||||||||||||||||||||||
| 6 8 10 12 14 16 18 20 |
3.2 5.2 7.2 8.9 11.0 13.0 15.0 17.0 |
5.2 7.1 8.9 11.0 13.0 15.0 17.0 |
6.0 7.8 9.8 11.5 13.5 15.5 |
7.5 9.5 11.5 14.5 16.5 |
11.0 13.0 15.0 |
14.0 |
||||||||||||||||||||
| 22 24 26 28 30 32 |
19.0 21.0 23.0 25.0 27.0 |
19.0 20.5 22.5 24.5 26.5 28.5 |
17.5 19.5 21.5 23.5 25.5 27.5 |
18.5 19.5 21.0 23.0 25.0 27.0 |
17.0 19.0 21.0 23.0 25.0 27.0 |
16.0 18.0 20.0 22.0 24.0 26.0 |
17.0 19.0 21.0 23.0 25.0 |
20.5 22.5 24.5 |
24.5 |
|||||||||||||||||
| 35 40 45 50 55 60 |
31.5 36.5 |
30.5 35.5 40.5 45.5 |
30.5 35.5 40.5 45.5 50.5 55.5 |
30.0 34.5 39.5 44.5 49.5 54.5 |
29.0 34.0 39.0 44.0 48.5 53.5 |
28.0 32.5 37.5 42.5 47.5 52.5 |
27.5 32.0 37.0 42.0 47.0 52.0 |
26.5 31.5 38.5 41.5 46.5 51.5 |
30.5 35.5 40.5 45.5 50.5 |
36.0 41.0 45.5 50.5 |
40.0 44.5 49.5 |
44.5 49.5 |
49.0 |
|||||||||||||
| 65 70 75 80 85 90 |
59.5 64.5 69.5 74.5 |
58.5 63.5 68.5 73.5 78.5 83.5 |
57.5 62.5 67.5 72.5 77.5 82.0 |
57.0 62.0 67.0 72.0 77.0 82.0 |
57.0 62.0 67.0 72.0 77.0 82.0 |
56.5 61.5 66.5 71.5 78.5 81.5 |
55.5 60.5 65.5 70.5 75.5 80.0 |
55.5 60.5 65.5 70.5 75.5 80.0 |
54.5 59.5 64.5 69.5 74.5 79.5 |
54.5 59.5 64.5 69.5 74.5 79.5 |
53.5 58.5 63.5 68.5 73.5 78.5 |
53.5 58.5 63.5 68.5 73.5 78.5 |
59.5 64.0 69.5 74.5 79.5 |
69.0 74.0 79.0 |
77.5 |
|||||||||||
| 95 100 120 140 160 180 |
88.5 93.5 |
87.0 92.0 112.0 |
87.0 92.0 112.0 132.0 |
87.0 92.0 112.0 132.0 152.0 |
86.0 91.0 111.0 130.0 150.0 171.0 |
85.0 90.0 110.0 130.0 150.0 170.0 |
85.0 90.0 110.0 130.0 150.0 170.0 |
84.5 89.5 109.5 129.0 149.0 169.0 |
84.5 89.5 109.5 129.0 149.0 169.0 |
83.5 88.5 109.0 128.0 148.0 168.0 |
83.5 88.5 109.0 128.0 148.0 168.0 |
84.5 88.65 109.5 129.0 149.0 169.0 |
84.5 88.65 109.5 129.0 149.0 169.0 |
82.5 87.5 108.0 127.0 147.0 169.0 |
87.0 107.0 127.0 147.0 167.0 |
105.0 125.0 145.0 165.0 |
105.0 125.0 145.0 165.0 |
123.0 143.0 163.0 |
143.0 163.0 |
164.0 |
||||||
| 200 220 240 260 280 300 |
190.0 |
190.0 |
189.0 209.0 229.0 |
189.0 209.0 229.0 249.0 |
168.0 208.0 228.0 248.0 268.0 286.0 |
168.0 208.0 228.0 248.0 268.0 286.0 |
168.0 206.0 228.0 248.0 268.0 286.0 |
189.0 209.0 229.0 249.0 268.0 288.0 |
189.0 209.0 229.0 249.0 268.0 288.0 |
187.0 207.0 227.0 247.0 267.0 287.0 |
185.0 205.0 225.0 245.0 265.0 285.0 |
185.0 205.0 225.0 245.0 265.0 285.0 |
183.0 203.0 223.0 243.0 263.0 283.0 |
183.0 203.0 223.0 243.0 263.0 283.0 |
183.0 203.0 223.0 243.0 263.0 283.0 |
183.0 203.0 223.0 243.0 263.0 283.0 |
||||||||||
Length Tolerance
| L Nominal Length |
Length Tolerance | |
|---|---|---|
| Over | thru | |
| -- | 10 | ±0.25 |
| 10 | 50 | ±0.50 |
| 50 | -- | ±0.75 |
Length From Head to Hole Center
| Lh Nominal Length From Head to Hole Center |
Head to Hole Center Tolerance Plus (Nothing Minius) |
|
|---|---|---|
| Over | thru | |
| -- | 3 | ±0.25 |
| 3 | 6 | ±0.30 |
| 6 | 10 | ±0.36 |
| 10 | 18 | ±0.43 |
| 18 | 30 | ±0.52 |
| 32 | 50 | ±0.62 |
| 50 | 80 | ±0.74 |
| 80 | 120 | ±0.87 |
| 120 | 180 | ±1.00 |
| 180 | 250 | ±1.15 |
| 250 | 315 | ±1.30 |
| 315 | 400 | ±1.40 |
| 400 | 500 | ±1.55 |
Hole To Shank Position Tolerance
| D Nominal Shank Diameter |
Hole to Shank Position Tolerance at MMC (Max Width) | |
|---|---|---|
| over | thru | |
| -- | 3 | 0.28 |
| 3 | 6 | 0.36 |
| 6 | 10 | 0.44 |
| 10 | 18 | 0.54 |
| 18 | 30 | 0.66 |
| 30 | 50 | 0.78 |
| 50 | 80 | 0.92 |
| 80 | 100 | 1.08 |
Materal and Hardness:- Unhardened clevis pins shall ve furnished unless hardened is specified
Unhardened Clevis Pins:- Unhardened steel clevis pins shall be made from steel with a maximum carbon content of 0.28 percent, and shall have hardness of 125-245 HV, 119-234 HB or 69-99 HRB
Hardened CLevis Pins:-
Hardened steel clevis pins shall be marked with a capital "H" on top of the head. Unless otherwise
specified by the purchaser, hardened clevis pins may be either through hardened or case hardened as
follows:
a) Through hardened clevis pins shall be made from SAE 52100, AISI E52100, UNS G5986 or equivalent alloy
steel, and shall have hardness of 500-650 HV30, 52-58 HRC or 517-611HB.
b) Case hardened clevis pins shall be made from low carbon steel, such as SAE/AISI 1010, UNS G10100 or
SAE/AISI 12114, UNS G12114 or equivalent and shall have a surface hardness of 600-700 HV1 or 88-90 HR15N
and a minimum hardness at case depth of 0.25-0.4 mm of 550 HV1 or 87 HR15N.