The Stem,fluid Valve, cataloged under National Stock Number 4820-01-221-2120, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-221-2120 |
| Item Name | Stem,fluid Valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| 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 |
|---|---|
| M584-4 | 3/9 Design control — primary reference Henry Technologies, Inc. |
| SP300 | D/9 Drawing number reference only Henry Technologies, Inc. |
| SP300 PIECE 2 | 5/9 Secondary reference Henry Technologies, Inc. |
NSN 4820-01-221-2120 is a Stem,fluid Valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 4820-01-221-8967, 2090-01-519-5623. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-01-221-2120: Special Features: WORKING PRESSURE 500 PSI;MAXIMUM TEMPERATURE RATE 350 DEG FAHRENHEIT; End Item Identification: HENRY MODEL M593-VN. 0 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.