Series IV EMI Straight Plug · Shell 19 · 32 Contacts

Specifications

Part-Number Decode & Cross-Reference

Applications

• Blind-mate rack and panel interfaces where a quarter-turn breech lock beats a thread
• EMI/RFI-shielded harness runs on high-vibration airframes
• Scoop-proof avionics boxes mated at build and again only at depot
• Ground-vehicle and gun-mount harnesses needing 500-hour salt-spray protection

D38999/46 is the EMI straight plug of MIL-DTL-38999 Series IV, the breech-lok variant of Series III. The letters decode as class W (cadmium olive drab over aluminium), shell F (size 19), insert F32 (32 contacts) and S = socket contacts with normal keying. Series IV shares the MIL-STD-1560 insert arrangements with Series III but replaces the triple-start thread with a 90° breech-lok coupling, which is what makes it the choice for blind-mate and high-vibration positions.