Machinery's Handbook, 31st Edition
1878
Cotter and Clevis Pins PINS AND STUDS American National Standard Cotter Pins ANSI/ASME B18.8.1-2014
Dia. A a & Width B Max.
Wire Width B Min.
Head Dia. C Min.
Prong Length D Min.
Dia. A a & Width B Max.
Wire Width B Min.
Head Dia. C Min.
Prong Length D Min.
Nom. Size
Hole Size
Nom. Size
Hole Size
1 ⁄ 32 3 ⁄ 64 1 ⁄ 16 5 ⁄ 64 3 ⁄ 32 7 ⁄ 64 9 ⁄ 64 5 ⁄ 32 1 ⁄ 8
0.032 0.022 0.06 0.048 0.035 0.09 0.060 0.044 0.12 0.076 0.057 0.16 0.090 0.069 0.19 0.104 0.080 0.22 0.120 0.093 0.25 0.134 0.104 0.28 0.150 0.116 0.31
0.01 0.047 0.02 0.062 0.03 0.078 0.04 0.094 0.04 0.109 0.05 0.125 0.06 0.141 0.06 0.156 0.07 0.172
3 ⁄ 16 7 ⁄ 32
0.176 0.137 0.38 0.207 0.161 0.44 0.225 0.176 0.50 0.280 0.220 0.62 0.335 0.263 0.75 0.406 0.320 0.88 0.473 0.373 1.00 0.598 0.472 1.25 0.723 0.572 1.50
0.09 0.207 0.10 0.241 0.11 0.275 0.14 0.343 0.16 0.413 0.20 0.482 0.23 0.550 0.30 0.688 0.36 0.825
1 ⁄ 4
5 ⁄ 16
3 ⁄ 8
7 ⁄ 16
1 ⁄ 2 5 ⁄ 8 3 ⁄ 4
a Tolerances are: − 0.004 inch for the 1 ⁄ 5 ⁄ 16 -inch sizes, incl.; − 0.006 inch for the 3 ⁄
32 - to 8 - to
3 ⁄ 16 -inch sizes, incl.; − 0.005 inch for the 7 ⁄
32 - to 8 - and
1 ⁄ 2 -inch sizes, incl.; and − 0.008 inch for the 5 ⁄
3 ⁄ 4 -inch sizes. Note: Tolerances for length are: up to 1 inch ± 0.030 inch, over 1 inch ±0.060 inch. All dimensions are in inches. American National Standard Clevis Pins ANSI/ASME B18.8.1-2014
G + 0.02 – 0.00 H
C
B A
Radius
D
F
45
L
Optional
0.005 0.015
E Dia. (Break Corners)
R
Point Length L
Nom. Size (Basic Pin Dia.)
Shank Dia. A Max
Head Dia. B Max.
Head Hgt. C Max.
Head Chamfer D Nom.
Hole Dia. E Max.
Point Dia. F Max.
Pin Lgth. G Basic a
Head to Hole Center H Max.
Cotter Pin Size for Hole
Max.
Min.
0.186 0.32 0.07 0.02 0.088 0.15 0.58 0.248 0.38 0.10 0.03 0.088 0.21 0.77 0.311 0.44 0.10 0.03 0.119 0.26 0.94 0.373 0.51 0.13 0.03 0.119 0.33 1.06 0.436 0.57 0.16 0.04 0.119 0.39 1.19 0.496 0.63 0.16 0.04 0.151 0.44 1.36 0.621 0.82 0.21 0.06 0.151 0.56 1.61 0.746 0.94 0.26 0.07 0.182 0.68 1.91 0.871 1.04 0.32 0.09 0.182 0.80 2.16 0.996 1.19 0.35 0.10 0.182 0.93 2.41
0.504 0.692 0.832 0.958 1.082 1.223 1.473 1.739 1.989 2.239
0.055 0.035 0.055 0.035 0.071 0.049 0.071 0.049 0.071 0.049 0.089 0.063 0.089 0.063 0.110 0.076 0.110 0.076 0.110 0.076
3 ∕ 16
1 ∕ 16 1 ∕ 16 3 ∕ 32 3 ∕ 32 3 ∕ 32
1 ∕ 4
5 ∕ 16
3 ∕ 8
7 ∕ 16
1 ∕ 2 5 ∕ 8 3 ∕ 4 7 ∕ 8
1 ∕ 8 1 ∕ 8
5 ∕ 32 5 ∕ 32 5 ∕ 32
1
...
...
...
...
Tolerance
− 0.05 in. − 0.02 in. ± 0.01 in. − 0.015 in. − 0.01 in. ... a Lengths tabulated are intended for use with standard clevises, without spacers. When other lengths are required, it is recommended that they be limited wherever possible to nominal lengths in 0.06-inch increments. All dimensions are in inches. For sizes, greater than 1-inch, refer to ANSI/ASME B18.8.1-2014. − 0.020 in.
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