The Restrictor,fluid Flow, cataloged under National Stock Number 4730-01-156-7267, 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 Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier. Government technical data includes 11 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-156-7267 |
| Primary Part Number | 3930AS481 |
| Item Name | Restrictor,fluid Flow |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
| Status | ACTIVE |
| Length | 2.070 INCHES NOMINAL IN |
| Thread Provision | THREADED LOCATION NOT OTHERWISE SPECIFIED |
| Design Type | TUBULAR |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) LOCATION NOT OTHERWISE SPECIFIED |
| Thread Length | 0.500 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN |
| Outside Diameter | 0.436 INCHES NOMINAL IN |
| Thread Direction | RIGHT-HAND LOCATION NOT OTHERWISE SPECIFIED |
| Thread Size Designator | 0.190-32 LOCATION NOT OTHERWISE SPECIFIED |
| Thread Class | 3B LOCATION NOT OTHERWISE SPECIFIED |
| Material | STEEL COMP 410 |
| Orifice Diameter | 0.086 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | F |
| Part Number | Manufacturer |
|---|---|
| 3930AS481 | The Boeing Company Div Defense (USA) |
| 3930AS481 | Vertex Modernization and Sustainment Llc (USA) |
| 3930AS481 PRIMARY | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
| 3930AS481 | Harlow Aerostructures, Llc (USA) |
| Reference | Meaning |
|---|---|
| 74A733051 | D/9 Drawing number reference only The Boeing Company Div Defense |
| 10108809 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| 74A733051-2009 | 5/9 Secondary reference Harlow Aerostructures, Llc |
| 74A733051-2009 | 5/9 Secondary reference The Boeing Company Div Defense |
| 74A733051-2009 | 5/9 Secondary reference Mercer Products & Manufacturing Company Dba Mercer Products & Manufacturing Co Div Mercer Products & Manufacturing |
NSN 4730-01-156-7267 is a Restrictor,fluid Flow, manufactured by Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-156-7267 has 4 manufacturer part numbers on file: 3930AS481 (The Boeing Company Div Defense), 3930AS481 (Vertex Modernization and Sustainment Llc), 3930AS481 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier), 3930AS481 (Harlow Aerostructures, Llc).
Key specifications for 3930AS481: Length: 2.070 INCHES NOMINAL IN; Thread Provision: THREADED LOCATION NOT OTHERWISE SPECIFIED; Design Type: TUBULAR; Thread Series: UNIFIED NATIONAL JOINT FINE (UNJF) LOCATION NOT OTHERWISE SPECIFIED. 11 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.