The Coupling Half,quick Disconnect, cataloged under National Stock Number 4730-00-949-3631, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier. Government technical data includes 10 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4730-00-949-3631 |
| Primary Part Number | 59A120A6-13-04A |
| Item Name | Coupling Half,quick Disconnect |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
| Status | ACTIVE |
| Connection Style | PLAIN ALL ENDS |
| Connection Type | INTERNAL QUICK DISCONNECT ALL ENDS |
| Connection Type | THREADED EXTERNAL PIPE FIRST FLUID END CONNECTION |
| Style Designator | MALE COUPLING HALF |
| Leg Length | 0.610 INCHES NOMINAL IN |
| Nominal Thread Size | 0.375 INCHES ALL ENDS IN |
| Surface Treatment | ANODIZE BODY |
| Material | ALUMINUM ALLOY BODY |
| Quick Disconnect Method | TWIST-LOCK ALL ENDS |
| Thread Series Designator | NPT ALL ENDS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 59A120A6-13-04A | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
| V1021J008A00 | Airlinx Aircraft Services Inc (USA) |
| Reference | Meaning |
|---|---|
| 49A120A6-13-04A | 7/2 Vendor item drawing reference Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| 1021-8A | 3/2 Design control — primary reference U.S. Government activity |
| 1021AR8A | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 1021J8A | 3/2 Design control — primary reference U.S. Government activity |
NSN 4730-00-949-3631 is a Coupling Half,quick Disconnect, manufactured by Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-949-3631 has 2 manufacturer part numbers on file: 59A120A6-13-04A (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier), V1021J008A00 (Airlinx Aircraft Services Inc).
1 possible match (shared part number, not a government interchangeability claim): 5835-01-022-9994. Verify interchangeability with system specifications before substitution.
Key specifications for 59A120A6-13-04A: Connection Style: PLAIN ALL ENDS; Connection Type: INTERNAL QUICK DISCONNECT ALL ENDS; Connection Type: THREADED EXTERNAL PIPE FIRST FLUID END CONNECTION; Style Designator: MALE COUPLING HALF. 10 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). 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.