The Restrictor Unit,fluid Flow, cataloged under National Stock Number 4730-01-200-1837, 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 25 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 | 4730-01-200-1837 |
| Primary Part Number | 810AS625 |
| Item Name | Restrictor Unit,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 |
| Pressure Rating | 576.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS |
| Width Across Flats | 0.679 INCHES MINIMUM AND 0.690 INCHES MAXIMUM IN |
| Strainer Type and Quantity | 1 FILTER |
| End Connection Component Type and Size for Which Designed | 1/4 IN. OD TUBE IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE BODY |
| Design Type | STRAIGHT |
| Thread Series | UNF FIRST CONNECTION |
| Thread Series | UNS SECOND CONNECTION |
| End Connection Type | THREADED MALE FIRST CONNECTION |
| End Connection Type | THREADED MALE, REGULAR FLARE SECOND CONNECTION |
| Material Document and Classification | QQ-S-766,CLASS 504L,COND A FED SPEC SINGLE MATERIAL RESPONSE FILTER |
| Valve Size | 0.250 INCHES IN |
| Thread Direction | RIGHT-HAND SECOND CONNECTION |
| Thread Direction | RIGHT-HAND FIRST CONNECTION |
| Thread Size Designator | 7/16-20 FIRST CONNECTION |
| Thread Size Designator | 7/16-20 SECOND CONNECTION |
| Surface Treatment | PASSIVATE BODY |
| Operating Temp Range | +24.0 TO 30.0 CELSIUS DEGC |
| Thread Class | 3A SECOND CONNECTION A |
| Thread Class | 3A FIRST CONNECTION A |
| Unable to Decode | UNABLE TO DECODE |
| Material | STEEL CORROSION RESISTING BODY |
| Material | STEEL CORROSION RESISTING FILTER |
| End Connection Similarity | NOT IDENTICAL |
| Angle Between Connections | 37.0 DEGREES NOMINAL ALL CONNECTIONS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 810AS625 PRIMARY | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
NSN 4730-01-200-1837 is a Restrictor Unit,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 4730-01-200-1837 has 1 manufacturer part number on file: 810AS625 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier).
Key specifications for 810AS625: Pressure Rating: 576.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS; Width Across Flats: 0.679 INCHES MINIMUM AND 0.690 INCHES MAXIMUM IN; Strainer Type and Quantity: 1 FILTER; End Connection Component Type and Size for Which Designed: 1/4 IN. OD TUBE IN. 25 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.
NSN 4730-01-200-1837 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.