The Restrictor Unit,fluid Flow, cataloged under National Stock Number 4730-01-398-4680, 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 Tompkins Industries Inc. Government technical data includes 16 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-398-4680 |
| Primary Part Number | 64004-8-R-063 |
| Item Name | Restrictor Unit,fluid Flow |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Tompkins Industries Inc |
| Status | ACTIVE |
| Width Across Flats | 0.875 INCHES NOMINAL IN |
| Design Type | STRAIGHT |
| Thread Series | UNF SECOND CONNECTION |
| Thread Series | UNF THIRD CONNECTION |
| End Connection Type | THREADED MALE, FLARELESS TUBE SECOND CONNECTION |
| End Connection Type | THREADED MALE, GASKET SEAL THIRD CONNECTION |
| Valve Size | 0.750 INCHES IN |
| Thread Direction | RIGHT-HAND THIRD CONNECTION |
| Thread Direction | RIGHT-HAND SECOND CONNECTION |
| Thread Size Designator | 3/4-16 SECOND CONNECTION |
| Thread Size Designator | 7/16-20 THIRD CONNECTION |
| Thread Class | 2A SECOND CONNECTION A |
| Thread Class | 2A THIRD CONNECTION A |
| Material | STEEL BODY |
| Orifice Diameter | 0.063 INCHES NOMINAL IN |
| End Connection Similarity | NOT IDENTICAL |
| 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 |
|---|---|
| 64004-8-R-063 PRIMARY | Tompkins Industries Inc (USA) |
| 8909A480-001 | The Entwistle Company Llc (USA) |
| Reference | Meaning |
|---|---|
| 64004-8-R-063 | 5/9 Secondary reference Brandis and Sons Inc |
NSN 4730-01-398-4680 is a Restrictor Unit,fluid Flow, manufactured by Tompkins Industries Inc, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-398-4680 has 2 manufacturer part numbers on file: 64004-8-R-063 (Tompkins Industries Inc), 8909A480-001 (The Entwistle Company Llc).
Key specifications for 64004-8-R-063: Width Across Flats: 0.875 INCHES NOMINAL IN; Design Type: STRAIGHT; Thread Series: UNF SECOND CONNECTION; Thread Series: UNF THIRD CONNECTION. 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.
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.