D38999/27
Category:38999 Series
Keywords:Threaded, IL-DTL-38999 connectors are divided into four series—Series I, II, III, and IV—and are the leading military-grade circular connectors for demanding applications. They are compatible with domestic and international brands of the same specification for interchangeability. Series I/II: Bayonet lock; Series III/IV: Three-start self-locking threaded quick-connect with scoop-proof design to prevent misalignment, ideal for blind-mate applications. Shell sizes range from 09# through 25#, offering wall-mount flange receptacles, nut-lock receptacles, straight plugs, and 90° angled plugs. Gold-plated copper contacts, IP67 protection.
Details
MIL-DTL-38999 is a high-end military-grade, high-density circular connector available in four series (I, II, III, IV) with full cross-compatibility across domestic and international brands. Series I and II feature bayonet coupling (Series II includes lightweight low-profile shells), while Series III and IV utilize a three-start threaded self-locking mechanism with scoop-proof and anti-misalignment design for blind mating.
The complete range offers nine shell sizes from 09# to 25#, including flange receptacles, nut-receptacles, straight plugs, and 90° angled plugs. Multiple shell materials and corrosion-resistant plating options provide salt-spray resistance, impact and vibration durability, and multi-layer sealing against dust, moisture, and oil. Integrated multi-key keying prevents misinsertion, supporting mixed power, high-speed signal, and coaxial configurations for demanding applications in aerospace, defense, new energy, and exploration sectors.
D38999/20 (Square Flange Receptacle), D38999/24 (Nut-Locking Receptacle), D38999/26 (Straight Plug)
D38999/26WJ09-09PN, D38999/26WJ11-98PN, D38999/26WJ13-35PN, D38999/26WJ15-19PN, D38999/26WJ17-26PN, D38999/26WJ19-32PN, D38999/26WJ21-75PN, D38999/26WJ23-61PN, D38999/26WJ25-98PN
D38999/27FJ09-09P, D38999/27FJ13-35P, D38999/27FJ15-19P, D38999/27FJ21-75P
D38999/20, D38999/24, D38999/26
D38999/26FJ09-09PN, D38999/26FJ11-98PN, D38999/26FJ13-35PN, D38999/26FJ15-19PN, D38999/26FJ17-26PN, D38999/26FJ19-32PN, D38999/26FJ21-75PN, D38999/26FJ23-61PN, D38999/26FJ25-98PN
D38999/30ZF15-19P, D38999/30ZF21-75P, D38999/32ZF15-19S, D38999/32ZF21-75S
Superior EMI shielding enables high-speed transmission; scoop-proof structure protects pins; multi-layer sealing ensures weather and durability; contacts are crimp-removable for easy maintenance; high-strength shells resist shock and vibration; mixed pin arrangements supported; IP67 protection rating; multiple plating options for various salt-spray environments.
Connection Types: Series I/II Bayonet Lock, Series III/IV Three-Start Threaded Self-Lock
Pin Counts: 3~128 pins, compatible with #12/#16/#20/#2 2D contacts
Operating Temperature: -65℃ to +175℃ (Stainless steel models up to 200℃)
Key Features: Multi-key anti-misinsertion, EMI shielding, Scoop-proof structure
Parameters:
Materials and Technical Specifications; Mechanical and Electrical Performance:
| Connection method | Threaded Connection | Insulating materials | TPU |
| Casing Material | Aluminum Alloy | Insulating materials | TPU |
| Insulating materials | TPU | Wiring Method | Weld: φ1.6, φ2.4, φ3.6, φ5.7 Solder: φ1.6, φ2.4, φ3.6, φ5.7 |
| Contact Material | Brass (gold-plated/silver-plated) | Wiring Method | Weld: φ1.6, φ2.4, φ3.6, φ5.7 Solder: φ1.6, φ2.4, φ3.6, φ5.7 |
| Wiring Method | Weld: φ1.6, φ2.4, φ3.6, φ5.7 Solder: φ1.6, φ2.4, φ3.6, φ5.7 | Temperature Range | -40℃~+70℃ |
| mating cycles | 500 500 cycles | Temperature Range | -40℃~+70℃ |
| Temperature Range | -40℃~+70℃ |
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