MIL-DTL-38999 Connector Series III and IV: Commercial and DLA QPL Environmental and Hermetic Connectors

D38999, the Industry Standard Mil/Aero Connector Backed by Glenair Service and Availability

DLA certified / qualified environmental and hermetic class MIL-DTL-38999 Series III and IV connectors are the most widely used and requested connectors within the mil-aero industry — and for good reason. Developed for reliability, the MIL-DTL-38999 Connector Series III triple-start thread prevents galling and cross-threading while providing quick disconnect, single-turn action to engage self-locking, metal-to-metal coupling. MIL-DTL-38999 Connector Series IV offers the industry's most robust mating with a 90 degree quarter-turn breech-lock mate with visual, tactile and audible engagement confirmation. The rugged construction of the D38999 Series IV connector disperses the mating force across a channeled metal flange while threaded mechanical force provides friction, locking the mating halves securely. Both series feature accessory threads and environmental sealing for reliable attachment of backshells. Scoop-proof shell design protects crimp-removable contacts from damage. Integrated plug-to-receptacle grounding and shell-to-shell bottoming delivers 65dB minimum shielding at 10 GHz.

DLA QPL MIL-DTL-38999 Connectors Series III and IV available from Glenair

Qualified environmental connector plug, as well as jam-nut, and square flange, box mount, wall mount and solder mount receptacle connectors
D38999 Series III Environmental Series Slash Sheets: D38999/26, D38999/24, D38999/20
D38999 Series III Hermetic Series Slash Sheets: D38999/21, D38999/25, D38999/23, D38999/27
D38999 Series IV Environmental Series Slash Sheets: D38999/46, D38999/40, D38999/42, D38999/44
D38999 Series IV Hermetic Series Slash Sheets: D38999/41, D38999/43, D38999/45, D38999/48
All 1560 crimp-contact insert arrangements for MIL-DTL-38999 Connector Series III and IV fully supported
Commercial-equivalent Environmental and hermetic versions available with plating classes IAW MIL-DTL-38999 Connector Series III and IV
A 100% made in America interconnect: No foreign sourced materials, component parts, or assembly labor employed

Contact Arrangement G29 — Glenair is now a qualified supplier of the MIL-STD-1560 G29 contact arrangement.

Both Glenair DLA qualified MIL-DTL-38999 Connector Series III and IV support all MIL-STD-1560 insert arrangements. Qualified environmental-class Series III connectors are supplied with W, F, G and T class materials and plating. Classes F, G and W are supplied for Series IV. Hermetic versions of Series III and IV are available in classes Y and N.

MIL-DTL-38999 Connector Series Technical Reference

Contacts and Tools

The New MIL-DTL-38999 Go-To Supplier

Industry standard and special design MIL-DTL-38999 mil-aero cylindrical connectors from the most accommodating engineering and manufacturing team in the interconnect industry — we say yes to standards and specials!

Engineered Solutions and Exotic Derivatives

High-density, push-pull, lanyard release, high temperature, ground plane, compliant pin, zero extraction force, thru-bulkhead, space grade, gender changers, modified flange, or any other modification needed to solve a complex interconnect challenge.

Liberal policies on NRE costs, minimum order quantities and delivery schedules.

MIL-DTL-38999 Connector Series III and IV

D38999, the Industry Standard Mil/Aero Connector Backed by Glenair Service and Availability

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MIL-DTL-38999 Series III QPL Connectors

DLA Qualified Manufacturer Listed Environmental and Hermetic Class Connectors

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MIL-DTL-38999 Series III QPL

MIL-DTL-38999 Series IV QPL and MCOTS Connectors

DLA Qualified Environmental and Hermetic Class Connectors plus Glenair Signature Designs including EMI Filter connectors, and more.

Datasheet
MIL-DTL-38999 Series IV QPL Connectors

MIL-DTL-38999 Connector Series III Environmental

Standard environmental-class MIL-DTL-38999 Series III connectors with DLA certification are now manufactured and supplied by Glenair. These industry standard connectors are ideally suited for the broad range of harsh environmental land, sea, air, and space applications and are backed with Glenair's industry leading service, support, and availability. Marked with D38999 or Glenair COTS part numbering, these environmental crimp-contact connectors are available in plug, jam-nut and wall mount receptacle shell styles. Standard material and finish classes are supported including W (Cad/O.D. over Electroless Nickel), F (Electroless Nickel), T (Nickel-PTFE) and G (Space-Grade Electroless Nickel). Contact arrangements per MIL-STD-1560 and both normal and alternate polarizations are fully supported. Best of all, defense and commercial aerospace customers, as well as land and marine engineers and procurement specialists may now specify these mission critical interconnects directly from Glenair — the recognized service, support, and availability leader for the interconnect industry.

Reference

Overview: MIL-DTL-38999 Series III Environmental

	D38999/26 MIL-DTL-38999 Connector Plug with Crimp Rear Release Contacts and Rear Accessory Threads
	D38999/24 MIL-DTL-38999 Jam-Nut Receptacle with Rear Release Crimp Contacts and Accessory Threads
	D38999/20 MIL-DTL-38999 Wall Mount Receptacle with Rear Release Crimp Contacts and Accessory Threads

MIL-DTL-38999 Series III Hermetic Connectors

Hermetic-class MIL-DTL-38999 Series III connectors are also available from Glenair with DLA certification. These hermetically sealed connectors are ideally suited for harsh environments where the environment exists under vacuum and must remain free of air or gas impurities via the ingress of foreign chemical substances. Such systems may be susceptible to the condensation of corrosive material, dielectric breakdown and the loss of insulation resistance between conductors. Typical applications include medical, geophysical, military aerospace and other industrial applications. Marked with D38999 or Glenair COTS part numbering, these hermetic class receptacles are available for MIL-DTL-38999 Connector Series III and IV in box mount, jam-nut, solder mount and weld mount shell styles. All standard material and finish classes are supported including Y (CRES, passivated) and N (CRES, electrodeposited nickel). Contact arrangements per MIL-STD-1560. All standard and normal and alternate key and keyway polarizations are fully supported. Best of all, defense and commercial aerospace customers, as well as land and marine engineers and procurement specialists may specify these mission-critical MIL-DTL-38999 interconnects directly from Glenair — the recognized service, support, and availability leader for the interconnect industry.

Reference

Overview: MIL-DTL-38999 Series III Hermetic

	D38999/21 MIL-DTL-38999 Series III Box Mount Hermetic Receptacle
	D38999/25 MIL-DTL-38999 Series III Solder Mount Hermetic Receptacle
	D38999/23 MIL-DTL-38999 Series III Jam-Nut Mount Hermetic Receptacle
	D38999/27 MIL-DTL-38999 Series III Weld Mount Hermetic Receptacle

MIL-DTL-38999 Connector Series IV Environmental

From vertical launch fire-control, tracking, and multi-target missile systems to rugged industrial applications such as mining/gas-pressure blasting, the Glenair's DLA qualified MIL-DTL-38999 Series IV connector is the ultimate solution for positive and reliable breech-locking connector performance. MIL-DTL-38999 Series IV plug and receptacle connectors are available in shell sizes 11—25, with MIL-STD-1560 insert arrangements as well as hybrid shielded contact arrangements. The heart of the MIL-DTL-38999 Series IV connector is its coupling nut/locking technology which provides rock solid breech-lock mating augmented with both primary and secondary locking mechanisms. Environmentally sealed, EMI grounded, and outfitted with pin-to-pin mating protection to prevent circuit shorts and mechanical damage, Glenair MIL-DTL-38999 Series IV QPL connectors deliver unsurpassed reliability and anti-demating performance.

Reference

Overview: MIL-DTL-38999 Series IV Environmental

	D38999/46 and D38999/47 MIL-DTL-38999 Series IV Connector Plugs with and without EMI Ground Spring
	D38999/40 MIL-DTL-38999 Series IV Wall Mount Receptacle with Rear Release Crimp Contacts
	D38999/42 MIL-DTL-38999 Series IV Box Mount Receptacle with Rear Release Crimp Contacts
	D38999/44 MIL-DTL-38999 Series IV Jam-Nut Mount Receptacle with Rear Release Crimp Contacts
	D38999/49 MIL-DTL-38999 Series IV In-Line Receptacle with Rear Release Crimp Contacts

MIL-DTL-38999 Connector Series IV Hermetic

Hermetic-class DLA certified MIL-DTL-38999 Series IV connectors from Glenair provide hermetically sealed breech lock connectors for high shock and vibration applications. Breech-lock systems provide robust engagement augmented by an internal mechanical thread to ensure connectors remain mated. Glenair MIL-DTL-38999 Series IV hermetics maintain seal integrity and prevent ingress of chemical substances or fluids in mission-critical vacuum environments where air or gas impurities can result in corrosion, dielectric breakdown, and loss of insulation resistance between conductors. Typical applications include medical, geophysical, military aerospace and other industrial applications. Marked with D38999 or Glenair COTS part numbering, these hermetic class receptacles are available for box mount, jam-nut, solder mount and weld mount shell styles. All standard material and finish classes are supported including Y (CRES, passivated) and N (CRES, electrodeposited nickel). Contact arrangements per MIL-STD-1560 and both normal and alternate polarizations are fully supported. Best of all, defense and commercial aerospace customers, as well as land and marine engineers and procurement specialists may now specify these mission-critical interconnects directly from Glenair — the recognized service, support, and availability leader for the interconnect industry.

Reference

Overview: MIL-DTL-38999 Series IV Hermetic

	D38999/41 MIL-DTL-38999 Series IV Box Mount Receptacle
	D38999/43 MIL-DTL-38999 Series IV Jam-Nut Mount Receptacle
	D38999/45 MIL-DTL-38999 Series IV Solder Mount Receptacle
	D38999/48 MIL-DTL-38999 Series IV Weld Mount Receptacle