The Coupling Half,quick Disconnect, cataloged under National Stock Number 4730-00-005-7353, 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 11 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-005-7353 |
| Primary Part Number | AA59439-004-12-20-B |
| 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 |
| Connection Style | HOSE GRIPPING NIPPLE ALL ENDS |
| Nominal Inside Diameter Hose Accommodated | 0.3985 INCHES ALL ENDS IN |
| Style Designator | MALE COUPLING HALF |
| Quick Disconnect Nominal Size | 0.422 INCHES ALL ENDS IN |
| Leg Length | 0.906 INCHES NOMINAL IN |
| Features Provided | SELF-SEALING |
| Specification/standard Data | 58536-A-A-59439 PROFESSIONAL/INDUSTRIAL ASSOCIATION SPECIFICATION |
| Nondefinitive Spec/std Data | A CLASS AND 4 STYLE AND 1 TYPE |
| First End Outside Diameter Hose Accommodated | 0.625 INCHES NOMINAL IN |
| Material | COPPER ALLOY BODY |
| Quick Disconnect Method | SPRING 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 |
|---|---|
| AA59439-004-12-20-B | Federal Commercial Item Description Promulgated by General Services Administration Washington DC (USA) |
| Reference | Meaning |
|---|---|
| AA59439-04-12-20-B | 5/9 Secondary reference Federal Commercial Item Description Promulgated by General Services Administration Washington DC |
| 3SD7 | C/1 Advisory reference — outside the item-of-supply concept Mosier Fluid Power of Ohio Inc Dba Kc Mosier Co |
| MILC4109 | 5/9 Secondary reference U.S. Government activity |
| M4109-04-12-20-B | 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 |
| 3SD7 | 5/9 Secondary reference Tuthill Corp Hansen Coupling Div |
NSN 4730-00-005-7353 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 4730-00-005-7353 has 1 manufacturer part number on file: AA59439-004-12-20-B (Federal Commercial Item Description Promulgated by General Services Administration Washington DC).
Key specifications for AA59439-004-12-20-B: Connection Style: HOSE GRIPPING NIPPLE ALL ENDS; Nominal Inside Diameter Hose Accommodated: 0.3985 INCHES ALL ENDS IN; Style Designator: MALE COUPLING HALF; Overall Length: 2.625 INCHES MINIMUM AND 2.906 INCHES MAXIMUM IN. 11 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.