The Cross,tube, cataloged under National Stock Number 4730-01-577-3400, 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 Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney. Government technical data includes 21 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-577-3400 |
| Primary Part Number | 4088779 |
| Item Name | Cross,tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| Connection Style | FLARED (TUBE) FIRST END |
| Connection Style | GRIPPING NIPPLE (NOSE) SECOND END |
| Connection Style | GRIPPING NIPPLE (NOSE) FOURTH END |
| Connection Style | GROOVED (HOSE) THIRD END |
| Nominal Inside Diameter Hose Accommodated | 0.675 INCHES THIRD END IN |
| Connection Type | THREADED EXTERNAL TUBE FIRST END |
| Connection Type | THREADED EXTERNAL TUBE SECOND END |
| Connection Type | UNTHREADED EXTERNAL HOSE THIRD END |
| Connection Type | THREADED EXTERNAL TUBE FOURTH END |
| Material Document and Classification | AMS 5646 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Size | 0.563 INCHES SECOND END IN |
| Nominal Thread Size | 0.563 INCHES FIRST END IN |
| Nominal Thread Size | 0.875 INCHES FOURTH END IN |
| Thread Class | 3A FIRST END A |
| Thread Class | 3A SECOND END A |
| Thread Class | 3A FOURTH END A |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) FIRST END |
| Thread Series Designator | UNABLE TO DECODE |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) SECOND END |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) FOURTH END |
| 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 |
|---|---|
| 4088779 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
NSN 4730-01-577-3400 is a Cross,tube, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-577-3400 has 1 manufacturer part number on file: 4088779 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).
Key specifications for 4088779: Connection Style: FLARED (TUBE) FIRST END; Connection Style: GRIPPING NIPPLE (NOSE) SECOND END; Connection Style: GRIPPING NIPPLE (NOSE) FOURTH END; Connection Style: GROOVED (HOSE) THIRD END. 21 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.