Mil-Spec Circular Connectors

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Part Number Guide


Brandex is an authorized distributor for Corsair Electrical Connectors MIL-DTL-38999 Series III. This series was designed for general purpose and harsh environment applications. Series III is comprised of part numbers D38999/20, D38999/24, & D38999/26 along with the option of 9 shell sizes and 54 different insert arrangements.


  • 'One turn' Acme threaded coupling
  • Rear Release Crimp Contacts
  • Available in olive drab, electroless nickel and zinc nickel
  • Shells available in aluminum and stainless steel.
  • Durability: Minimum of 500 mating cycles.

Shell Style

Shell Styles

Class (finish & material)

F = aluminum shell, electroless nickel finish

K = stainless steel shell, passivated, firewall

W = aluminum shell, olive drab cadmium over electroless nickel base

S = stainless steel shell, electro deposited nickel

Z = zinc nickel, conductive finish

Shell Size

A - 9

B - 11

C - 13

D - 15

E - 17

F - 19

G - 21

H - 23

J - 25

Insert Layout

See catalog

Contact Type

P - Pin

S - Socket

A - Connector Less Pin Contacts

B - Connector Less Socket Contacts

Polarization (keying)

N - Normal (Included in part number)

A, B, C, D, or E