The Restrictor,fluid Flow, cataloged under National Stock Number 4730-00-075-3609, 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 10 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-075-3609 |
| Primary Part Number | 237487 |
| 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 | 0.245 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN |
| Thread Provision | THREADED LOCATION NOT OTHERWISE SPECIFIED |
| Design Type | TUBULAR |
| Thread Series | UNF LOCATION NOT OTHERWISE SPECIFIED |
| Thread Length | 0.250 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN |
| Outside Diameter | 0.312 INCHES NOMINAL IN |
| Thread Size Designator | 0312-24 LOCATION NOT OTHERWISE SPECIFIED |
| Thread Class | 3A LOCATION NOT OTHERWISE SPECIFIED A |
| Material | STEEL CORROSION RESISTING |
| Orifice Diameter | 0.027 INCHES MINIMUM AND 9.029 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 |
|---|---|
| 237487 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| 237487 PRIMARY | Northrop Grumman Innovation Systems Llc Div Ngis (USA) |
| Reference | Meaning |
|---|---|
| 237487 | 5/9 Secondary reference Turbo Power & Marine System Inc Sub of United Technologies Corp |
| 237487 | 5/9 Secondary reference Cooper Industries Inc Cooper Petroleum Equipment Div Sunnyvale Operation |
| 237487 | 5/9 Secondary reference Alliant Techsystems Inc |
NSN 4730-00-075-3609 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 4730-00-075-3609 has 2 manufacturer part numbers on file: 237487 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), 237487 (Northrop Grumman Innovation Systems Llc Div Ngis).
2 possible matches (shared part number, not a government interchangeability claim): 5360-00-146-6040, 3120-01-119-0509. Verify interchangeability with system specifications before substitution.
Key specifications for 237487: Length: 0.245 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN; Thread Provision: THREADED LOCATION NOT OTHERWISE SPECIFIED; Design Type: TUBULAR; Thread Series: UNF LOCATION NOT OTHERWISE SPECIFIED. 10 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.