The Diffuser,ring Valve, cataloged under National Stock Number 4820-01-202-9631, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-202-9631 |
| Item Name | Diffuser,ring Valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| General Characteristics Item Description | CORROSION RESISTANT STEEL 300 SERIES |
| 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 |
|---|---|
| 168652 | 3/2 Design control — primary reference U.S. Government activity |
| 222614 | D/9 Drawing number reference only U.S. Government activity |
| 168652 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 222614 ITEM 29 | 5/2 Secondary reference U.S. Government activity |
NSN 4820-01-202-9631 is a Diffuser,ring Valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-202-9631: General Characteristics Item Description: CORROSION RESISTANT STEEL 300 SERIES. 1 specification is 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.