What This Contact Tube Does in a D-Sub Assembly
The TE Connectivity AMPLIMITE 3-1393561-6 is a contact tube — a metal sleeve that fits over the crimp barrel of a D-Sub contact before it is inserted into the plastic housing. It reinforces the contact retention within the cavity and provides the extra diameter needed to fill the larger rear bore of housings designed for 15-37 position shells. Without it, a standard crimp contact can rattle or back out under cable strain in those wider cavities.
Position Range and Housing Fit
This tube covers the 15 through 37 position range — one part number serves DE-9S, DA-15, DB-25, and DC-37 shell sizes when used with the matching AMPLIMITE plastic housing. The tube itself does not change with position count; it is the same metal sleeve that fits the rear cavity of any housing in that range. What varies is the contact you crimp inside it — pin or socket, wire gauge, and plating grade — all selected separately for the signal or power duty.