The Restrictor Unit,fluid Flow, cataloged under National Stock Number 4730-01-166-8450, 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 Sea Systems Command. Government technical data includes 16 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-166-8450 |
| Primary Part Number | 5196856 |
| Item Name | Restrictor Unit,fluid Flow |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Strainer Type and Quantity | 1 FILTER |
| End Connection Component Type and Size for Which Designed | 1/4 IN. PIPE IN |
| Design Type | STRAIGHT |
| Thread Series | NPT ALL CONNECTIONS |
| End Connection Type | THREADED MALE, TAPERED PIPE ALL CONNECTIONS |
| Material Document and Classification | FED STD 66 FED STD SINGLE MATERIAL RESPONSE OR AISI 316 ASSN STD SINGLE MATERIAL RESPONSE OR SAE 30316 ASSN STD SINGLE MATERIAL RESPONSE FILTER |
| Material Document and Classification | QQ-S-764 TYPE 303 CONDITION A FED SPEC SINGLE MATERIAL RESPONSE BODY |
| Diameter | 0.250 INCHES NOMINAL IN |
| Valve Size | 0.250 INCHES IN |
| Thread Direction | RIGHT-HAND ALL CONNECTIONS |
| Thread Size Designator | 1/4-18 ALL CONNECTIONS |
| Thread Class | 2A ALL CONNECTIONS A |
| Material | STEEL COMP 303 BODY |
| Material | STEEL COMP 316 FILTER |
| Orifice Diameter | 0.015 INCHES NOMINAL IN |
| End Connection Similarity | NOT IDENTICAL |
| 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 |
|---|---|
| 5196856 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 25S-PPR | 5/2 Secondary reference U.S. Government activity |
| 196856 | 5/9 Secondary reference Lockheed Martin Corporation Div Rms - Mitchel Field |
NSN 4730-01-166-8450 is a Restrictor Unit,fluid Flow, manufactured by Naval Sea Systems Command, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-166-8450 has 1 manufacturer part number on file: 5196856 (Naval Sea Systems Command).
Key specifications for 5196856: Strainer Type and Quantity: 1 FILTER; End Connection Component Type and Size for Which Designed: 1/4 IN. PIPE IN; Design Type: STRAIGHT; Thread Series: NPT ALL CONNECTIONS. 16 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 4730-01-166-8450 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.