MILDTL 38999 S III MIL-DTL-38999 Features and Application Series III Features and Application Universal I/R Tool A single, expendable plastic tool is used for both insertion and removal of contacts. MIL-DTL-38999 Series III is the newest cylindrical connector Scoop-Proof Design Recessed pins in elongated shells designed for highest performance capabilities used in both minimize the possibility for contact damage. In a blind general purpose and severe environment applications. mating application, mating shells cannot scoop the pins, and cause a shorting or bending of contacts. These connectors feature an improved one-turn coupling system, utilizing self-locking acme thread. Acme threads Closed-Entry Socket Insert Hard dielectric socket face provide coupling durability, while thicker wall sections and has lead-in chamfers for positive alignment of pins (even greater coupling surface area improve strength and shock partially bent within pre-established limits) with sockets. resistance. Blunting of the threads on both receptacle and plug coupling nut eliminates cross threading. Interfacial Pin Insert Seal Raised moisture barriers around each pin, which mate into lead-in chamfers of Elongated mounting holes permit the Series III Connector to hard face socket insert, provide individual contact sealing. intermount with various existing Mil-spec ange mounted Interfacial seal is never touched by service tools. receptacles, giving it a design replacement advantage. Elastomer Wire Sealing Grommet Sealing over a wide Wall mount receptacle, jam nut receptacle and straight range of wire diameters is assured by a triple wire seal in self-locking RFI plug are offered in 9 shell sizes and 54 insert each cavity at the rear of the connector. arrangements utilizing M39029 contacts in sizes 22D, 20, 16, 12, 10 power and 8 twinax. Superior Contact Stability Rear release crimp contact system features a stamped beryllium-copper retaining clip These connectors are available in wide range of shell materials captivated by molded-in shoulders of each contact cavity in and nishes. Aluminum shells are offered in electroless nickel the insulator. A rear-inserted M81969 plastic tool expands and olive drab cadmium. Other nishes such as anodic and the tines beyond the shoulder, releasing the contact. zinc nickel are available upon request to commercial callouts only. In addition, we offer stainless steel shells (both passivated Metric Accessory Thread Metric thread results in and electro-deposited nickel plated) with rewall inserts, and additional wall thickness giving greater strength and shock for highly corrosive environments, nickel-aluminum-bronze resistance. shells with standard environment-resisting inserts (commer- cial callouts only). 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. Lockwiring Eliminated Self-locking quick coupling plug eliminates the need for lockwiring. Firewall Capability - Stainless steel shells in both K and S rewall classes are offered. wwwwww..ccoonneessyyss..ccoomm 3 6 ssaalleess aaeerroo--eelleeccttrriicc..ccoommMILDTL 38999 S III MIL-DTL-38999 Performance Specications Series III Performance Specications Environmental Seal Wired, mated connectors with specied accessories Operating Temperature Range attached, shall meet the altitude-immersion test specied in Classes F, K, S and BZ*: -65C to +200C (-85F to +392F) MIL-DTL-38999. Classes W and ZC*: -65C to +175C (-85F to +347F) Shell-to-Shell Conductivity Material and Finish Data (Class) Maximum potential drop shall not exceed: F aluminum shell, electroless nickel nish Classes F and S = 1.0 millivolt. K stainless steel shell, passivated, rewall Class W = 2.5 millivolts, Class K = 10.0 millivolts S stainless steel shell, electrodeposited nickel, rewall W aluminum shell, olive drab cadmium over nickel base Shock and Vibration Requirements BZ* aluminum nickel bronze shell, std insert Wired, mated connectors shall not be damaged, nor shall Z* aluminum shell, zinc nickel nish there be a current interruption longer than one microsecond when subjected to the following: Corrosion Resistance Classes K, W, BZ* and Z* withstand 500-hour salt spray. Shock Classes F and S withstand 48-hour salt spray. Pulse of approximate half sine wave of 300 G 15 percent mag- nitude with duration of 3 1 milliseconds applied in three axes. Durability Minimum of 500 mating cycles. High Impact Shock When mounted as specied in MIL-S-901, grade A, a drop Fluid Resistance of a 400 lb. Hammer from 1 foot, 3 feet and 5 feet applied to Connectors resist specied immersions in MIL-PRF-7808, connector in three axes, totaling nine impacts. MIL-PRF-23699, MIL-PRF-5606, M2-V Chevron oil, Coolanol 25, MIL-DTL-83133 (JP-8), MIL-DTL-5624 (JP-4, JP-5), Vibration SAE-AMS1424 Type I, and other solvents and cleaning agents. Wired and mated connectors withstand the following vibration levels: Shielding Effectiveness Sine vibration where connector samples with simulated RFI and EMI attenuation at the specied frequencies meet accessory load are subjected to simple harmonic motion the requirements of MIL-DTL-38999. from 10 to 2,000 Hz in three mutually perpendicular axes, RFI shielding effectiveness of mated connectors with RFI in 20 minute sweeps, for 12 hours in each axis at velocity of backshells is measured in a triaxial radio frequency leakage 254 mm/sec from 10-50 Hz, displacement of 1.5 mm from xture. 50-140Hz and acceleration of 60G from 140-2,000Hz. EMI shielding effectiveness is measured at the interface Random Vibration per MIL-STD-1344, method 205, of mated connectors and tested by the mode-stirred test condition V at ambient temperature and test technique specied in method 3008 of MIL-STD-1344. condition VI, Letter J at elevated temperature. Voltage Rating * Not on QPL, can be supplied to Aero-Electric part number only. Suggested Operating Voltage Test Voltage Test Voltage Test Voltage Test Voltage Service (Sea Level) Sea Level 50,000 Ft. 70,000 Ft. 100,000 Ft. Rating AC (RMS) DC V RMS V RMS V RMS V RMS M 400 550 1300 550 350 200 N 300 450 1000 400 260 200 I 600 850 1800 600 400 200 II 900 1250 2300 800 500 200 Note: The establishment of electrical safety factors is left exactly what peak voltages, switching currents, transients, etc., entirely to the designer, as he is in the best position to know can be expected in a particular circuit. www.conesys.com 3 7 sales aero-electric.com