MIL-SPEC · D38999/20Updated 2026-10-03
D38999/20FB35SN
The '20' indicates a Series III wall mount receptacle shell style. The 'F' specifies an aluminum body with an electroless nickel plating (48-hr. Salt Spray). The 'B' denotes a shell size of 11. The '35' refers to the insert arrangement, which is a high-density size-22D layout. The 'S' indicates socket contacts. The 'N' specifies a normal keyway orientation. US aerospace/military hardware standard for MIL-DTL-38999 Series III circular connectors, which are environmentally resistant connectors using removable crimp contacts and having an operating range of -65 to +200°C.
Part number dissection
D38999US aerospace/military hardware standard for MIL-DTL-38999 Series III circular connectors, which are environmentally resistant connectors using removable crimp contacts and having an operating range of -65 to +200°C.
20FB35The '20' indicates a Series III wall mount receptacle shell style. The 'F' specifies an aluminum body with an electroless nickel plating (48-hr. Salt Spray). The 'B' denotes a shell size of 11. The '35' refers to the insert arrangement, which is a high-density size-22D layout.
SNThe 'S' indicates socket contacts. The 'N' specifies a normal keyway orientation.
Specifications
Base codeThe '20' indicates a Series III wall mount receptacle shell style. The 'F' specifies an aluminum body with an electroless nickel plating (48-hr. Salt Spray). The 'B' denotes a shell size of 11. The '35' refers to the insert arrangement, which is a high-density size-22D layout.
Finish / variantThe 'S' indicates socket contacts. The 'N' specifies a normal keyway orientation.
Qualified sources · QPL-38999
GLENAIR, INC.CAGE 06324 · USA
HI REL CONNECTORS, INC.CAGE 34222 · USA
SOURIAUCAGE F0225 · FRA
AERO-ELECTRIC CONNECTOR, INC.CAGE 59976 · USA
CORSAIR ELECTRICAL CONNECTORS INCCAGE 1R6R9 · USA
AMPHENOL SOCAPEX (DC ELECTRONICS INC)CAGE F6162 · FRA
AMPHENOL CORPCAGE 77820 · USA
TE CONNECTIVITY CORPORATION (TYCO ELECTRONICS CORPORATION)CAGE 11139 · USA
AMPHENOL INTERCONNECT INDIA PRIVATE LIMITEDCAGE 1433Y · IND
Sources listed on the Qualified Products List for D38999/20FB35SN, per DLA's Qualified Products Database. View on DLA QPD ↗
Acceptable alternates
D38999/20FB35PNSame connector, but with pin contacts instead of socket contacts.
D38999/26FB35SNSame shell size, finish, insert arrangement, and keying, but a straight plug instead of a wall mount receptacle.
Confirm acceptability against your drawing before ordering.
Availability
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TraceabilityFull documentation with every shipment
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BTEK Components MFG LLC · Largo, FloridaPart data compiled and verified by BTEK's sourcing engine.