MIL-DTL-38999 Series III

MIL-DTL-38999 Series III is the newest cylindrical connector designed for highest performance capabilities used in both general purpose and severe environment applications.

These connectors feature an improved “one-turn” coupling system, utilizing self-locking acme thread. Acme threads provide coupling durability, while thicker wall sections and greater coupling surface area improve strength and shock resistance. Blunting of the threads on both receptacle and plug coupling nut eliminates cross threading.

Elongated mounting holes permit the Series III Connector to intermount with various existing Mil-Spec flange mounted receptacles, giving it a design replacement advantage.

Wall mount receptacles, jam nut receptacles and straight self-locking RFI plugs are offered in 9 shell sizes and 54 insert arrangements utilizing M39029 contacts in sizes 22D, 20, 16, 12, 10 power and 8 twinax.

Series Prefix: D38999/

Series Applications: High-performance military aircraft, Commercial airlines, Communications equipment, Armored personnel carriers & tanks, Missiles, Shipboard

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Ordering Guide

D38999/20FA35PN

BASIC PART NUMBER

D38999/

SHELL STYLE

/20 – WALL MOUNT RECEPTACLE
/21 – HERMETIC SEAL BOX MOUNT RECEPTACLE
/23 – HERMETIC SEAL JAM NUT RECEPTACLE
/24 – JAM NUT RECEPTACLE
/25 – HERMETIC SEAL SOLDER MOUNT RECEPTACLE
/26 – STRAIGHT PLUG, SELF LOCKING
/27 – HERMETIC SEAL WELD MOUNT RECEPTACLE

CLASS

F – ENVIRONMENTAL, ALUMINUM, ELECTROLESS NICKEL
G – ENVIRONMENTAL, SPACEGRADE, ALUMINUM, ELECTROLESS NICKEL
H – HERMETIC, SPACEGRADE, STAINLESS STEEL, ELECTROLESS NICKEL
J – ENVIRONMENTAL, COMPOSITE, CADMIUM OLIVE DRAB, 500 HR. SALT SPRAY
K – ENVIRONMENTAL FIREWALL, STAINLESS STEEL, PASSIVATED
M – ENVIRONMENTAL, COMPOSITE, ELECTROLESS NICKEL
N – HERMETIC, STAINLESS STEEL, ELECTRODEPOSITED NICKEL
S – ENVIRONMENTAL, STAINLESS STEEL, ELECTRODEPOSITED NICKEL
W – ENVIRONMENTAL, ALUMINUM, CADMIUM OLIVE DRAB 500 HR. SALT SPRAY
Y – HERMETIC, STAINLESS STEEL, ELECTROLESS NICKEL

SHELL SIZE

ABCDEFGHJ
91113151719212325

INSERT ARRANGEMENT

SEE CHART

CONTACT STYLE

P – PIN, S – SOCKET ; 500 CYCLE (CRIMP HERMETICS W/SOLDER CUPS).
A – LESS PIN CONTACTS, B – LESS SOCKET CONTACTS
H – PIN CONTACTS, 1500 CYCLE
J – SOCKET CONTACTS, 1500 CYCLE
X – PIN WITH EYELET (HERMETICS ONLY)
Z – SOCKET WITH EYELET (HERMETICS ONLY)

POLARIZATION

N (NORMAL), A, B, C, D, E