The Valve,restrictor Check, cataloged under National Stock Number 4820-01-339-0311, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 3 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-339-0311 |
| Item Name | Valve,restrictor Check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Style Designator | STRAIGHT THRU |
| Material Document and Classification | QQ-S-763C,303 FED SPEC 1ST MATERIAL RESPONSE BODY |
| Material | STEEL CORROSION RESISTING BODY |
| 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 |
|---|---|
| 4820-030-1 | 5/9 Secondary reference Aidc/aerospace Industrial Development Corp. Dba Aidc |
| FCRG1870200H | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-01-339-0311 is a Valve,restrictor Check, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-339-0311: Style Designator: STRAIGHT THRU; Material Document and Classification: QQ-S-763C,303 FED SPEC 1ST MATERIAL RESPONSE BODY; Special Features: FACE TO FACE DISTANCE: 1.480 IN. MIN TO 1.550 IN. MAX; PROOF PRESSURE 6000 PSI; CRACKING PRESSURE 2-8 PSI IN; End Item Identification: PACER DAWN. 3 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.