D38999/20FB4PN

Conn MIL-DTL-38999 Circular PIN 4POS Crimp ST Wall Mount 4 Terminal 1Port

* MIL-STD-1560 Insert Arrangements * Series III connectors use insert patterns and contacts common to Series I, making for an easy transition from bayonet to triple-lead, acme-thread, self-locking coupling. * Metal-to-Metal Bottoming * This feature precludes relative shell-to-shell motion, which may result in ordinary connector wear and moisture entrapment. * Lock wiring Eliminated * Self-locking quick coupling plug eliminates the need for lock wiring. * Firewall Capability * Stainless steel shells in both K and S firewall classes are offered. * Universal I/R Tool * A single, expendable plastic tool is used for both insertion and removal of contacts. * Scoop-Proof Design * Recessed pins in elongated shells minimize the possibility for contact damage. In a blind mating application, mating shells cannot “scoop” the pins, and cause a shorting or bending of contacts. * Closed-Entry Socket Insert * Hard dielectric socket face has lead-in chamfers for positive alignment of pins even partially bent within pre-established limits with sockets. * Interfacial Pin Insert Seal * Raised moisture barriers around each pin, which mate into lead-in chamfers of hard face socket insert, provide individual contact sealing. Interfacial seal is never touched by service tools. * Elastomer Wire Sealing Grommet * Sealing over a wide range of wire diameters is assured by a triple wire seal in each cavity at the rear of the connector. * Superior Contact Stability * Rear release crimp contact system features a stamped beryllium-copper retaining clip captivated by molded-in shoulders of each contact cavity in the insulator. A rear-inserted M81969 plastic tool expands the tines beyond the shoulder, releasing the contact. * Metric Accessory Thread * Metric thread results in additional wall thickness giving greater strength and shock resistance. * Twinax Contacts * Aero Electric is Qualified to make and supply M39029/90-529 and M39029/91-530 size 8 Twinax contacts used in 38999 III connectors. * Wall mount receptacle * Aluminum shell, electro less nickel finish * Shell Size "B