The Bend,tube,return, cataloged under National Stock Number 4730-01-308-4884, 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 Raytheon Company Dba Raytheon Co. Government technical data includes 14 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4730-01-308-4884 |
| Primary Part Number | B 49956 |
| Item Name | Bend,tube,return |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Raytheon Company Dba Raytheon Co |
| Status | ACTIVE |
| Connection Style | INSERT (HOSE) SECOND END |
| Connection Style | SWIVEL NUT, COMPRESSION (TUBE) FIRST END |
| Seat Nominal Radius | 0.675 INCHES FIRST END IN |
| Nominal Inside Diameter Hose Accommodated | 0.375 INCHES SECOND END IN |
| Connection Type | UNTHREADED EXTERNAL HOSE SECOND END |
| Connection Type | THREADED INTERNAL TUBE FIRST END |
| Nominal Outside Diameter Tube Accommodated | 0.625 INCHES FIRST END IN |
| Nominal Thread Size | 0.562 INCHES FIRST END IN |
| Surface Treatment | NICKEL LONG SWIVEL NUT |
| Surface Treatment | NICKEL TUBE |
| Thread Class | 2B FIRST END |
| Material | COPPER TUBE |
| Material | COPPER ALLOY LONG SWIVEL NUT |
| Thread Series Designator | UNEF FIRST END |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 4730-01-308-4884 is a Bend,tube,return, manufactured by Raytheon Company Dba Raytheon Co, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-308-4884 has 2 manufacturer part numbers on file: 638999 (Raytheon Company Dba Raytheon Co), B 49956 (Raytheon Company Dba Raytheon Co).
Key specifications for B 49956: Connection Style: INSERT (HOSE) SECOND END; Connection Style: SWIVEL NUT, COMPRESSION (TUBE) FIRST END; Seat Nominal Radius: 0.675 INCHES FIRST END IN; Nominal Inside Diameter Hose Accommodated: 0.375 INCHES SECOND END IN. 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.