ASME B18.8.1 pdf download Clevis Pins and Cotter Pins (Inch Series) 2.2.3 Clevis Pin Head Periphery. The periphery ofthe head shall be within a circular runout equal to 12%of the maximum head diameter or 0.020 in., whicheveris greater, with respect to the axis of the shank, as deter-mined over a length under the head equal to the nominalpin diameter. 2.3...