The Reducer,hose, cataloged under National Stock Number 4730-00-277-8495, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. Government technical data includes 12 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 4730-00-277-8495 |
| Item Name | Reducer,hose |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Connection Style | GASKET SEAL (HOSE) FIRST END |
| Connection Style | PLAIN (HOSE) SECOND END |
| Nominal Overall Length | 3.500 INCHES IN |
| Connection Type | THREADED INTERNAL HOSE FIRST END |
| Connection Type | THREADED EXTERNAL HOSE SECOND END |
| Nominal Thread Size | 4.000 INCHES SECOND END IN |
| Nominal Thread Size | 2.500 INCHES FIRST END IN |
| Thread Quantity Per Inch | 6 SECOND END |
| Thread Quantity Per Inch | 7-1/2 FIRST END |
| Material | COPPER ALLOY OVERALL |
| Thread Series Designator | NH ALL ENDS |
| Reducer Type | CONCENTRIC |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| H298 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4730-00-277-8495 is a Reducer,hose, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
3 possible matches (shared part number, not a government interchangeability claim): 5950-00-968-0536, 4920-01-020-8041, 4520-01-165-7948. Verify interchangeability with system specifications before substitution.
Key specifications for 4730-00-277-8495: Connection Style: GASKET SEAL (HOSE) FIRST END; Connection Style: PLAIN (HOSE) SECOND END; Nominal Overall Length: 3.500 INCHES IN; Connection Type: THREADED INTERNAL HOSE FIRST END. 12 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.