The Coupling Half,quick Disconnect, cataloged under National Stock Number 4730-00-320-1886, 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 14 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through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4730-00-320-1886 |
| Primary Part Number | AA59439-012-08-18-C |
| 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 BODY |
| Connection Style | HOSE GRIPPING NIPPLE ALL ENDS |
| Nominal Inside Diameter Hose Accommodated | 0.250 INCHES ALL ENDS IN |
| Mating End Identification | HANSEN MFGCOUPLING HALF,QUICK DISCONNECT,PART N0. 3SB5 |
| Connection Type | THREADED EXTERNAL HOSE GRIPPING FIRST FLUID END CONNECTION |
| Connection Type | EXTERNAL QUICK DISCONNECT FIRST QUICK DISCONNECT END |
| Style Designator | MALE COUPLING HALF |
| Leg Length | 0.750 INCHES NOMINAL IN |
| Specification/standard Data | 58536-A-A-59439 PROFESSIONAL/INDUSTRIAL ASSOCIATION SPECIFICATION |
| Nondefinitive Spec/std Data | A CLASS AND 4 STYLE AND 2 TYPE |
| Surface Treatment | CADMIUM BODY |
| First End Outside Diameter Hose Accommodated | 0.563 INCHES NOMINAL IN |
| Material | STEEL BODY |
| Quick Disconnect Method | PUSH-PULL 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 |
|---|---|
| AA59439-012-08-18-C | Federal Commercial Item Description Promulgated by General Services Administration Washington DC (USA) |
| Reference | Meaning |
|---|---|
| PC5-3 | 5/1 Secondary reference Foster Manufacturing Co, Inc. Dba Foster Manufacturing Co |
| AA59439-12-08-18-C | 5/9 Secondary reference Federal Commercial Item Description Promulgated by General Services Administration Washington DC |
| 3PC5 | 5/9 Secondary reference Tuthill Corp Hansen Coupling Div |
| H8CD5 | 5/9 Secondary reference U.S. Government activity |
| MILC4109 | 5/9 Secondary reference U.S. Government activity |
| A-A-59439 | 4/1 Identification reference Federal Commercial Item Description Promulgated by General Services Administration Washington DC |
| M4109-12-08-18-C | 5/9 Secondary reference U.S. Government activity |
NSN 4730-00-320-1886 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 4730-00-320-1886 has 1 manufacturer part number on file: AA59439-012-08-18-C (Federal Commercial Item Description Promulgated by General Services Administration Washington DC).
1 possible match (shared part number, not a government interchangeability claim): 3020-01-292-1636. Verify interchangeability with system specifications before substitution.
Key specifications for AA59439-012-08-18-C: Surface Treatment Document and Classification: QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE BODY; Connection Style: HOSE GRIPPING NIPPLE ALL ENDS; Nominal Inside Diameter Hose Accommodated: 0.250 INCHES ALL ENDS IN; Mating End Identification: HANSEN MFGCOUPLING HALF,QUICK DISCONNECT,PART N0. 3SB5. 14 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.