MIL-DTL-25955A
3.4.1 Contact design and construction. Contacts shall conform to the dimensions on figure 1 and
additional details as specified in the applicable detail documents. Neither pins nor sockets shall be
damaged by any possible twisting or forcing during the normal process of mating connectors.
3.4.1.1 Pin engaging end. The entering end of pin contacts formed with a spherical radius may contain
a flat not in excess of .010 inch (0.25 mm) diameter in the center of the spherical development. The point
of pin contacts formed with a conical entering end shall be broken to a flat or diameter of .005 inch
(0.13 mm) minimum.
3.4.1.2 Socket engaging end. The engaging end of socket contacts shall be rounded or chamfered to
allow for direction and centering of the mating pin contact. The socket contact shall provide the spring
action for maintaining the contact pressure between the pin and the socket.
3.4.1.3 Closed entry sockets. Socket contacts shall exclude the entry of a pin .005 inch (0.13 mm)
larger then the allowable maximum diameter of a mating pin.
3.4.1.4 Contact terminations. Contact or wire terminations shall be designed for a crimp type of
connection and as specified on figure 1.
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