Harting D-Sub Screwlocking AssembliesScrewlocking assemblies for use with Harting Sub D connectors. These screwlocking assemblies have a nickel or tinned finish.• Male jackscrew for 9 - 37 contacts• Female jackscrew for 9 - 50 contactsStock number 873-9854 is an M3 hex extender kit consisting of two M3 extenders and washers.StandardsMIL-C-24308, DIN 41652, CECC 75301-802