D38999/44

MIL-DTL-38999 Series IV Jam Nut Receptacle — Breech Coupling

Series IV · Breech (quarter-turn) coupling · Jam nut mounting · Rear-release crimp contacts

Specifications

Slash Sheet

D38999/44

Series

MIL-DTL-38999 Series IV

Style

Receptacle, jam nut mount

Coupling

Breech, 90° quarter-turn

Mounting

Through-panel with jam nut and lockwasher

Panel Benefit

No mounting flange required on the panel face

Series IV Equivalents

/40 wall mount · /42 box mount · /46 plug EMI · /47 plug

Contacts

M39029 rear-release crimp, size 22D through size 8

Contact Gender

Pin or socket insert

Class Codes

F environmental electroless nickel · W cadmium olive drab · G · Y CRES passivated · N CRES nickel

Polarization

N (normal) plus A, B, C, D, K, L, M, R, U

Temperature

-65 °C to +200 °C

Durability

500 mating cycles

Bend Moment

1000 lb-in

Coupling Confirmation

Audible, tactile and visual engagement

Shock / Vibration

MIL-DTL-38999 high-impact shock and vibration qualified

Interchangeability

Intermates with Series III of the same shell size and arrangement

COSMETIC Equivalents

Glenair 234-105-44 COTS family

Standard

MIL-DTL-38999 / AS38999

Cross-Reference

BrandEquivalent Part Number
AiroadconD38999/44
Glenair234-105-44
Amphenol AerospaceD38999/44
TE Connectivity / DeutschD38999/44
Souriau / EatonD38999/44

Applications

D38999/44 is the jam-nut-mount receptacle of MIL-DTL-38999 Series IV. Instead of a flange with mounting holes, the shell passes through a single circular cut-out in the panel and is secured from behind by a jam nut and lockwasher — a layout that saves panel area on a crowded bulkhead and lets the connector be positioned freely rather than on a bolt pattern. That makes it the standard choice for instrument panels, junction boxes and equipment racks where several connectors are packed into a small face. Series IV's 90-degree breech-lok coupling gives the same audible, tactile and visual mating confirmation as the rest of the family, with the 1000 lb-in bend-moment rating and 500-cycle durability that suit cables carrying real mechanical load.

Need D38999/44?

Cross-brand compatible. Free samples available. 4-week lead time on standard configurations.

Email: info@airoadcon.com | Phone: +86-189-9192-7716