The Seat,valve, cataloged under National Stock Number 4820-01-221-5592, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 2 specifications, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-221-5592 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Style Designator | PLAIN THREADED |
| Material | STEEL COMP 316 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 |
|---|---|
| D49653 ITEM 6 | C/1 Advisory reference — outside the item-of-supply concept Hunt Valve Company, Inc. |
| D49653 | D/9 Drawing number reference only Hunt Valve Company Inc Dba Union Flonetics |
| D49653 ITEM 6 | 5/9 Secondary reference Hunt Valve Company Inc Dba Union Flonetics |
| A48483MEF | C/1 Advisory reference — outside the item-of-supply concept Hunt Valve Company, Inc. |
| A48483MEF | 3/9 Design control — primary reference Hunt Valve Company Inc Dba Union Flonetics |
NSN 4820-01-221-5592 is a Seat,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4820-01-221-5649. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-01-221-5592: Overall Height: 2.480 INCHES NOMINAL IN; Style Designator: PLAIN THREADED; Material: STEEL COMP 316 BODY. 2 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.