The Reducer,hose, cataloged under National Stock Number 4730-01-221-5557, 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 Atwood & Morrill Co., Inc. Dba Weir Valves and Controls Usa. Government technical data includes 9 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-221-5557 |
| Primary Part Number | 12553 DWG 3573-F PIECE 6 |
| Item Name | Reducer,hose |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Atwood & Morrill Co., Inc. Dba Weir Valves and Controls Usa |
| Status | ACTIVE |
| Connection Style | PLAIN (HOSE) ALL ENDS |
| Nominal Overall Length | 8.750 INCHES IN |
| Connection Type | THREADED EXTERNAL HOSE ALL ENDS |
| Nominal Thread Size | 4.750 INCHES FIRST END IN |
| Nominal Thread Size | 3.250 INCHES SECOND END IN |
| Thread Quantity Per Inch | 7-1/2 ALL ENDS |
| 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 |
| Part Number | Manufacturer |
|---|---|
| 12553 DWG 3573-F PIECE 6 PRIMARY | Atwood & Morrill Co., Inc. Dba Weir Valves and Controls Usa (USA) |
| Reference | Meaning |
|---|---|
| S4824H3117480 PIECE 6 | 5/2 Secondary reference U.S. Government activity |
| 3573-F | D/9 Drawing number reference only Atwood & Morrill Co., Inc. Dba Weir Valves and Controls Usa |
NSN 4730-01-221-5557 is a Reducer,hose, manufactured by Atwood & Morrill Co., Inc. Dba Weir Valves and Controls Usa, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-221-5557 has 1 manufacturer part number on file: 12553 DWG 3573-F PIECE 6 (Atwood & Morrill Co., Inc. Dba Weir Valves and Controls Usa).
Key specifications for 12553 DWG 3573-F PIECE 6: Connection Style: PLAIN (HOSE) ALL ENDS; Nominal Overall Length: 8.750 INCHES IN; Connection Type: THREADED EXTERNAL HOSE ALL ENDS; Nominal Thread Size: 4.750 INCHES FIRST END IN. 9 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.