The Coupling Half,quick Disconnect, cataloged under National Stock Number 4730-00-203-9461, 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 Federal Commercial Item Description Promulgated by General Services Administration Washington DC. Government technical data includes 15 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through both NSN and commercial part number lookups. 9 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-203-9461 |
| Primary Part Number | AA59439-002-08-00-C & -011-08-00 |
| Item Name | Coupling Half,quick Disconnect |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Federal Commercial Item Description Promulgated by General Services Administration Washington DC |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Connection Style | PLAIN FIRST FLUID END CONNECTION |
| Nominal Inside Diameter Hose Accommodated | 0.250 INCHES ALL ENDS IN |
| Connection Type | THREADED INTERNAL PIPE FIRST FLUID END CONNECTION |
| Connection Type | UNTHREADED EXTERNAL HOSE SECOND FLUID END CONNECTION |
| Style Designator | FEMALE COUPLING HALF |
| Operating Pressure | 150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Features Provided | SELF-SEALING |
| Nominal Thread Size | 0.250 INCHES FIRST FLUID END CONNECTION IN |
| Specification/standard Data | 81349-MIL-C-4109 GOVERNMENT SPECIFICATION |
| Nondefinitive Spec/std Data | 1 TYPE AND A CLASS AND 2 STYLE AND 2 TYPE AND 3 STYLE |
| Surface Treatment | CADMIUM OVERALL |
| Material | STEEL OVERALL |
| Quick Disconnect Method | SPRING PUSH-PULL ALL ENDS |
| Thread Series Designator | NPT FIRST FLUID END CONNECTION |
| 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 |
|---|---|
| AA59439-002-08-00-C & -011-08-00 | Federal Commercial Item Description Promulgated by General Services Administration Washington DC (USA) |
| Reference | Meaning |
|---|---|
| MILC4109 | 5/9 Secondary reference Allied Healthcare Products Inc Chemetron Medical Div Replacement CAGE Code 62842 |
| MILC4109 | 5/1 Secondary reference Foster Manufacturing Co, Inc. Dba Foster Manufacturing Co |
| MILC4109 | 5/9 Secondary reference U.S. Government activity |
| MILC4109 | 5/1 Secondary reference Allied Healthcare Products, Inc. Dba Allied |
| A-A-59439 | 4/1 Identification reference Federal Commercial Item Description Promulgated by General Services Administration Washington DC |
| MILC4109 | 5/9 Secondary reference U.S. Government activity |
| M4109-020800C AND M4109-110800C | 5/9 Secondary reference U.S. Government activity |
| 3000L16 | 5/9 Secondary reference Tuthill Corp Hansen Coupling Div |
| 33-3375-500-035 | 5/1 Secondary reference U.S. Government activity |
NSN 4730-00-203-9461 is a Coupling Half,quick Disconnect, manufactured by Federal Commercial Item Description Promulgated by General Services Administration Washington DC, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-203-9461 has 1 manufacturer part number on file: AA59439-002-08-00-C & -011-08-00 (Federal Commercial Item Description Promulgated by General Services Administration Washington DC).
Key specifications for AA59439-002-08-00-C & -011-08-00: Surface Treatment Document and Classification: QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Connection Style: PLAIN FIRST FLUID END CONNECTION; Nominal Inside Diameter Hose Accommodated: 0.250 INCHES ALL ENDS IN; Connection Type: THREADED INTERNAL PIPE FIRST FLUID END CONNECTION. 15 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.