MIL-DTL-38999 Series IV Catalog
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MIL-DTL-38999 Series IV Catalog - 1

Breech-Lok™ and Power-Breech™ Connectors and Cable Assemblies COOPER Interconnect

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MIL-DTL-38999 Series IV Catalog - 2

The industry’s largest installed base of MIL-DTL-38999 Series IV connectors General purpose connectors Cooper Interconnect offers an extensive range of QPL and modified solutions. Please refer to the ordering-information pages for listings of QPL-certified configurations. • Technical specifications • Ordering information • Shell/insert configurations • Insert/contact ratings • Insert drawings • Polarization tables • Installation instructions Box mount receptacles (D38999/42) Mechanical drawings – 21 In-line receptacles (D38999/49) Mechanical drawings – 22 Straight plugs (D38999/46 & 47)...

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MIL-DTL-38999 Series IV Catalog - 3

Standard and quick-turn-custom connector and cable solutions Specialized interconnect solutions Accessories (D38999/50, 51, & 52) Overview – 25 Receptacle & plug covers – 26 Dummy stowage receptacles - 29 Connector Savers – 30 Hermetic receptacles (D38999/41,43,45, & 48) Overview – 45 Technical specifications – 46 Ordering information – 47 Shell/insert configurations – 48 Mechanical drawings – 49 Wing-Lok™ plugs Overview – 31 Technical specifications – 32 Ordering information – 33 Shell/insert configurations - 34 Mechanical drawings – 35 PC tail connector configurations Overview – 53...

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MIL-DTL-38999 Series IV Catalog - 4

Engineered for uncompromised performance in military and aerospace applications Breech-Lok™ design advantages Breech-Lok™ connectors feature a coupling mechanism that only requires 90° of rotation to engage and disengage. This rugged design distributes the coupling load over solid-metal lands while internal-drive threads provide the mechanical advantage needed to ensure positive engagement of the contacts and interfacial seals. The harsh-environment design depicted below is representative of all of Cooper Interconnect’s standard and custom Breech-Lok™ solutions. Breech-Lok™ features and...

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MIL-DTL-38999 Series IV Catalog - 5

Quick-turn custom connectors and cable assemblies Vertical integration accelerates design-to-delivery cycle times Cooper Interconnect combines the industry’s most advanced engineering tools with an extensive array of vertically-integrated-manufacturing resources to quickly deliver custom-interconnect solutions. This tightly integrated, design-through-deployment methodology improves performance and reliability, reduces cost, and accelerates time to market across a wide range of production volumes. Please refer to page seven for descriptions of application specific, Breech-Lok™ modifications....

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MIL-DTL-38999 Series IV Catalog - 6

Breech-Lok™ custom capabilities Breech-Lok™ custom lanyard solutions require significantly lower separation forces than D38999/31-compliant connectors • Straight pull releases with as low as 90 pounds of force. • 15° off-angle separations with as low as 100 pounds of force. • Designed to withstand 500 harsh-environment mating cycles and 100 snatch releases. • Additional lanyard-plug modifications include redundant releases and custom and adjustable lanyard lengths. • Breech-Lok™ lanyard release, flight heritage includes the Bell Helicopter V22 Osprey and the Eurocopter Tiger. Custom...

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MIL-DTL-38999 Series IV Catalog - 7

Field-proven technologies facilitate mission-critical successes Your one-stop shop for custom connectivity in QPL and customer-defined form factors Cooper Interconnect has delivered one of the industry’s broadest ranges of mission critical, custom solutions: • • • • • • • • • • • Actuator-released interconnects Cryogenic connectors Deadfaced in-flight disconnects EVA quick disconnects High voltage quick disconnects Integrated gas and fluid fittings Interstage-raceway connectors Low-imparted-impulse connectors Umbilical connectors and cable assemblies Vertical launch disconnects...

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MIL-DTL-38999 Series IV Catalog - 8

Power-Breech™ custom solutions up to 900 amps Meets MIL-DTL-38999 Series IV performance requirements • Heritage includes Peacekeeper ICBM qualifications; Boeing specifications 280-36501, 280-36503, 280-36505, and 280-36507. • High-current capabilities include solutions configured with four, #4/0 contacts. • Available with 2024 Al-alloy shells and CAD/OD (per QQ-P-416) finishes that withstand 500 hours salt spray. • MIL-DTL-38999 Series IV derived, breech-mating designs survive 500 engagement cycles. • Vibration and shock capabilities include MIL-STD-202, Method 204, Condition D and...

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MIL-DTL-38999 Series IV Catalog - 9

Power-Breech™ technical specifications Heritage-proven designs in shell sizes 33 - 57 The specifications listed below have been confirmed through customer qualifications of Power-Breech™ connectors designed for their harsh-environment applications. These heritage-proven specifications are presented as capabilities references. Please contact Cooper Interconnect to discuss how quickly custom Power-Breech™ solutions can be developed to meet your specific requirements. Materials, finish, and mechanical Shell and coupling ring material Shell and coupling ring plating Contact material & plating...

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MIL-DTL-38999 Series IV Catalog - 10

General purpose QPL and modified connectors Field-proven performance in mission-critical applications • Comprehensive range of QPL and modified solutions include Class G, space-rated connectors. • High-speed-data configurations include MIL-STD-1553. • Grounding occurs 0.050 inch (1.27mm) before electrical-contact engagement. • 360° grounding fingers provide up to 65dB protection at 1GHz. • -65°C to 200°C operating temperatures. • Finish options include 500 hour salt-spray-rated platings. • Rugged-design features include self locking, coupling nuts and end-bell-accessory hardware. The...

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MIL-DTL-38999 Series IV Catalog - 11

General-purpose connectors technical specifications Materials, finish, and mechanical Class C Shell and coupling ring material Shell and coupling ring plating Corrosion resistant steel Electrodeposited nickel 2024 Aluminum Nickel fluorocarbon polymer Contact material & plating Copper alloy with gold plating, 50 micro-inches minimum Hard dielectric wafer Grounding springs Beryllium copper Mating life Contact retention Environmental, shock, vibration, and EMI/RFI Class C Operating temperature Sealing Corrosion resistance Sand and dust as per MIL-STD-202 and ice resistance Withstands 500 hours...

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