H2D Environmental Series

The H2D series offers virtually equal performance to MIL-DTL-38999 interconnects with roughly 70% weight and approximately 50% size savings for equivalent insert arrangements. Currently HIRELCO's® H2D products are trusted in a variety of commercial and military applications including aerospace, land-based and nautical interconnect systems. To date, HiRel Connectors offers our H2D series in a heavy duty, double start ACME thread (H2DA2* or H2DB2*). This H2D product line was developed specifically for the harshest environmental situations that require the most reliable connectors in the industry.


  • Weight Savings alternative to MIL-DTL-38999
  • High Density
  • Scoop Proof Design; Prevents damage to pin contacts
  • Up to 128 contacts per connector


Mechanical Specs

Application / Market: Aerospace, Commercial, Military
Shape: Circular
Shell Style: Square Flange Receptacle, Jam Nut Receptacle, Solder/Weld Mount Receptacle, Inline Receptacle, Self-Locking Plug
Durability: 500 Mating Cycles
Contact Style / Termination: Crimp, Solder, PC Tail
Salt Spray: Up to 500 hours

Material Specs

Shell: Aluminum, Stainless Steel, Titanium
Shell Plating: Passivated Stainless Steel, Low Stress Nickel, Olive Dram Cadmium, Zinc Nickel, Nickel-Teflon, Anodize Black
Insulator: Firewall Grade Thermoplastic
Contacts: Beryllium Copper
Contact Plating: Gold
Grommet and Seals: Fluorsilicone

Electrical Specs

Current Rating: 5 to 23 amps (Depending on Contact Size)
Gauge Wire Size: 22 to 28 AWG Wire (Size 23 Contact)

Environment Specs

Operating Temperature: Class T, Z,W = +175C, All others up to +200C

"Our Job is to Create Your Vision. We can design
Any Custom Solution for Your application."

- HIREL Connectors Inc. -