The Restrictor,fluid Flow, cataloged under National Stock Number 4730-01-063-9398, 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 13 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-063-9398 |
| Primary Part Number | 702578CL12 |
| Item Name | Restrictor,fluid Flow |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| Length | 0.640 INCHES MINIMUM AND 0.660 INCHES MAXIMUM IN |
| Thread Provision | THREADED LOCATION NOT OTHERWISE SPECIFIED |
| Design Type | TUBULAR |
| Thread Series | UNS LOCATION NOT OTHERWISE SPECIFIED |
| Thread Length | 0.228 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN |
| Thread Pitch Diameters | +0.4079 TO 0.4105 INCHES LOCATION NOT OTHERWISE SPECIFIED IN |
| Material Document and Classification | AMS 5640 ASSN STD SINGLE MATERIAL RESPONSE |
| Outside Diameter | 0.490 INCHES MINIMUM AND 0.496 INCHES MAXIMUM IN |
| Thread Direction | RIGHT-HAND LOCATION NOT OTHERWISE SPECIFIED |
| Thread Size Designator | 0.4375-24 LOCATION NOT OTHERWISE SPECIFIED |
| Thread Class | 3A LOCATION NOT OTHERWISE SPECIFIED A |
| Material | STEEL CORROSION RESISTING |
| Orifice Diameter | 0.112 INCHES MINIMUM AND 0.113 INCHES MAXIMUM IN |
| 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 |
|---|---|
| 702578CL12 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| Reference | Meaning |
|---|---|
| 702578 | D/9 Drawing number reference only Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
NSN 4730-01-063-9398 is a Restrictor,fluid Flow, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-063-9398 has 1 manufacturer part number on file: 702578CL12 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).
Key specifications for 702578CL12: Length: 0.640 INCHES MINIMUM AND 0.660 INCHES MAXIMUM IN; Thread Provision: THREADED LOCATION NOT OTHERWISE SPECIFIED; Design Type: TUBULAR; Thread Series: UNS LOCATION NOT OTHERWISE SPECIFIED. 13 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.