the stress concentration at the fillet 16 area fig4 a fig4 b and fig4 c illustrate the stress patterns further fig4 a repeats fig3 b and illustrates the combined load components shown in fig4 b and fig4 c fig4 b shows the horizontal load components 39 40a and 43 the vertical load 42 and the horizontal load 43 are the load components resolved from the reacting load 41 acting on the taper surface 15 the stress diagram in fig4 b indicates the stress distribution across the section line 37 due to bending with tensile stress on the outer surface 19 and compressive stress on the inner surface 25 fig4 c shows the vertical load 38 which is the primary load acting on the latch 10 and reacting by the vertical load component 42 horizontal load 40b and others not shown balance the free body diagram but fig4 c is intended to show the effects of the vertical load components load bending and tension take place within the section under this loading condition the stress diagram indicates the stress distribution across the section line 37 at the fillet 16 area both outer and inner surfaces 19 and 25 are under tensile stress at the cross section with a higher stress at the inner surface 25 by adding the stresses shown in fig4 b and fig4 c the result is shown in fig4 a which illustrates the effect of the added bending in the latch based on the foregoing it is necessary that an interference fit exits between the locking sleeve 13 the latch 24 and the pin casing 23 when the connector is in the lock position the amount of interference.