Two axial keyways 0.107 in. Min by 0.111 in. Max wide by 0.065 in. Min 0.075 in. Max deep by 0.380 in. Nom long; one end countersunk 79.5 deg min 80.5 deg max to 0.480 in. Min 0.490 max dia; other end chamfered 0.050 in. By 45.0 ddeg; external 0.562-18unf-2a thread full length; fluorocarbon dispersion lubricant per mil spec mil-l-60326; heat treated to h1025,155000 psi tensile per sae spec ams 5643