The Ring,expansion,hose, cataloged under National Stock Number 4730-00-243-9133, 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 5 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-243-9133 |
| Primary Part Number | AA55535-07 |
| Item Name | Ring,expansion,hose |
| 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 |
| Outside Diameter | 2.500 INCHES NOMINAL IN |
| Specification/standard Data | 81349-MIL-R-11521 GOVERNMENT SPECIFICATION |
| Nondefinitive Spec/std Data | 1 FIGURE |
| Material | COPPER ALLOY |
| Thickness | 0.050 INCHES MINIMUM AND 0.065 INCHES MAXIMUM IN |
| 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 |
|---|---|
| AA55535-07 | Federal Commercial Item Description Promulgated by General Services Administration Washington DC (USA) |
| Reference | Meaning |
|---|---|
| A-A-55535 | 4/1 Identification reference Federal Commercial Item Description Promulgated by General Services Administration Washington DC |
| MIL-R-11521 | 5/9 Secondary reference U.S. Government activity |
| M11521-07 | 5/9 Secondary reference U.S. Government activity |
NSN 4730-00-243-9133 is a Ring,expansion,hose, 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 4730-00-243-9133 has 1 manufacturer part number on file: AA55535-07 (Federal Commercial Item Description Promulgated by General Services Administration Washington DC).
2 possible matches (shared part number, not a government interchangeability claim): 4730-00-243-9135, 4730-00-243-9136. Verify interchangeability with system specifications before substitution.
Key specifications for AA55535-07: Overall Length: 1.250 INCHES NOMINAL IN; Outside Diameter: 2.500 INCHES NOMINAL IN; Specification/standard Data: 81349-MIL-R-11521 GOVERNMENT SPECIFICATION; Nondefinitive Spec/std Data: 1 FIGURE. 5 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.