The Connector,plug,electrical, cataloged under National Stock Number 5935-01-043-3477, is classified within Federal Supply Class 5935 (Connectors, Electrical) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Labinal Components and Systems Inc Cinch Military Aerospace Div. Government technical data includes 25 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5935-01-043-3477 |
| Primary Part Number | 1221-540 |
| Item Name | Connector,plug,electrical |
| FSC / FSG | 5935 / 59 — Connectors, Electrical |
| Manufacturer | Labinal Components and Systems Inc Cinch Military Aerospace Div |
| Status | ACTIVE |
| Connector Locking Method | BAYONET PIN |
| Shell Type | SOLID |
| Body Style | STRAIGHT SHAPE, INTERNAL COUPLING |
| Terminal Type | SOLDER WELL SINGLE MATING END SINGLE CONTACT GROUPING |
| Contact Material | COPPER ALLOY SINGLE MATING END SINGLE CONTACT GROUPING |
| Overall Diameter | 0.390 INCHES MAXIMUM IN |
| Mating End Quantity | 1 |
| Precious Material | GOLD |
| Contact Position Arrangement Style | BNC SINGLE MATING END |
| Shell Surface Treatment | NICKEL |
| Insert Position in Deg | 140.0 AND 280.0 |
| Precious Material and Weight | 0.005 GOLD GRAINS, TROY |
| Shell Material Document and Classification | QQ-B-626,COMP 22 FED SPEC SINGLE MATERIAL RESPONSE |
| Terminal Location | BACK SINGLE MATING END SINGLE CONTACT GROUPING |
| Included Contact Quantity | 1 SINGLE MATING END SINGLE CONTACT GROUPING |
| Shell Surface Treatment Document and Classification | QQ-N-290,CL 2 FED SPEC SINGLE TREATMENT RESPONSE |
| Included Contact Type | COAXIAL SOCKET SINGLE MATING END SINGLE CONTACT GROUPING |
| Polarization Method | KEYWAY OR MULTIPLE KEYWAY |
| Connector Cable Strain Relief Method | COMPRESSION NUT |
| Environmental Protection | MOISTURE RESISTANT AND VIBRATION RESISTANT AND SALT WATER RESISTANT |
| Precious Material and Location | CONTACT SURFACE GOLD |
| Contact Removability | NONREMOVABLE SINGLE MATING END SINGLE CONTACT GROUPING |
| Cable Entrance Diameter | 0.160 INCHES MINIMUM AND 0.170 INCHES MAXIMUM IN |
| Contact Surface Treatment | GOLD AND NICKEL SINGLE MATING END SINGLE CONTACT GROUPING |
| Shell Material | COPPER ALLOY |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 1221-540 PRIMARY | Labinal Components and Systems Inc Cinch Military Aerospace Div (USA) |
NSN 5935-01-043-3477 is a Connector,plug,electrical, manufactured by Labinal Components and Systems Inc Cinch Military Aerospace Div, classified under FSC 5935, Connectors, Electrical. Status: active.
NSN 5935-01-043-3477 has 1 manufacturer part number on file: 1221-540 (Labinal Components and Systems Inc Cinch Military Aerospace Div).
1 possible match (shared part number, not a government interchangeability claim): 5355-01-670-3218. Verify interchangeability with system specifications before substitution.
Key specifications for 1221-540: Connector Locking Method: BAYONET PIN; Shell Type: SOLID; Body Style: STRAIGHT SHAPE, INTERNAL COUPLING; Terminal Type: SOLDER WELL SINGLE MATING END SINGLE CONTACT GROUPING. 25 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.