The Elbow,pipe to Boss, cataloged under National Stock Number 4730-01-556-0773, 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 15 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-556-0773 |
| Item Name | Elbow,pipe to Boss |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Furnished Items and Quantity | 1 UNION NUT AND 1 PREFORMED PACKING AND 1 TAILPIECE |
| Flow Angle | 90.0 DEGREES |
| Connection Style | GASKET SEAL (TUBE) SECOND END |
| Connection Style | PLAIN (PIPE) FIRST END |
| Connection Type | THREADED EXTERNAL BOSS SECOND END |
| Connection Type | THREADED EXTERNAL PIPE FIRST END |
| Operating Pressure | 6000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Leg Length | 0.812 INCHES NOMINAL FIRST END IN |
| Leg Length | 1.188 INCHES NOMINAL SECOND END IN |
| Nominal Thread Size | 0.562 INCHES SECOND END IN |
| Nominal Thread Size | 0.125 INCHES FIRST END IN |
| Thread Class | 2A SECOND END A |
| Material | STEEL OVERALL |
| Thread Series Designator | NPT FIRST END |
| Thread Series Designator | UNF SECOND END |
| 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 |
|---|---|
| PLH666B001 FN 201 | 5/2 Secondary reference U.S. Government activity |
| H821-4-2-S-VITON | 3/2 Design control — primary reference U.S. Government activity |
| H821-04-02-SS | 5/2 Secondary reference U.S. Government activity |
| 150543 | 5/2 Secondary reference U.S. Government activity |
NSN 4730-01-556-0773 is a Elbow,pipe to Boss, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
Key specifications for 4730-01-556-0773: Furnished Items and Quantity: 1 UNION NUT AND 1 PREFORMED PACKING AND 1 TAILPIECE; Flow Angle: 90.0 DEGREES; Connection Style: GASKET SEAL (TUBE) SECOND END; Connection Style: PLAIN (PIPE) FIRST END. 15 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.