The Restrictor Unit,fluid Flow, cataloged under National Stock Number 4730-01-502-0310, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. Government technical data includes 15 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-502-0310 |
| Item Name | Restrictor Unit,fluid Flow |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Design Type | STRAIGHT |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) FIRST CONNECTION |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) SECOND CONNECTION |
| End Connection Type | THREADED MALE TUBE FIRST CONNECTION |
| End Connection Type | THREADED MALE TUBE SECOND CONNECTION |
| Material Document and Classification | QQ-S-763, CLASS 303 FED SPEC SINGLE MATERIAL RESPONSE LOCATION NOT OTHERWISE SPECIFIED |
| Thread Direction | RIGHT-HAND SECOND CONNECTION |
| Thread Direction | RIGHT-HAND FIRST CONNECTION |
| Thread Size Designator | 0.437-20 FIRST CONNECTION |
| Thread Size Designator | 0.750-16 SECOND CONNECTION |
| Thread Class | 3A SECOND CONNECTION A |
| Thread Class | 3A FIRST CONNECTION A |
| Material | STEEL COMP 303 BODY |
| Material | STEEL SCREENING |
| End Connection Similarity | IDENTICAL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| JEFX0110050AD | 3/2 Design control — primary reference U.S. Government activity |
NSN 4730-01-502-0310 is a Restrictor Unit,fluid Flow, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
Key specifications for 4730-01-502-0310: Design Type: STRAIGHT; Thread Series: UNIFIED NATIONAL JOINT FINE (UNJF) FIRST CONNECTION; Thread Series: UNIFIED NATIONAL JOINT FINE (UNJF) SECOND CONNECTION; End Connection Type: THREADED MALE TUBE FIRST CONNECTION. 15 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.