The Piston,valve, cataloged under National Stock Number 4820-00-390-4262, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. 14 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-00-390-4262 |
| Item Name | Piston,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 |
|---|---|
| SPI-NA69245 | 5/9 Secondary reference Ships Parts Inc |
| NH6357PC306 | 5/9 Secondary reference U.S. Government activity |
| H8171PC179 | 5/9 Secondary reference U.S. Government activity |
| H7698PC140 | 5/9 Secondary reference U.S. Government activity |
| NH6725PC306 | 5/9 Secondary reference U.S. Government activity |
| 607018 | 5/9 Secondary reference U.S. Government activity |
| 607018 | C/1 Advisory reference — outside the item-of-supply concept Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions |
| NH7025PC306 | 5/9 Secondary reference U.S. Government activity |
| NH7182PC306 | 5/9 Secondary reference U.S. Government activity |
| NH7407PC306 | 5/9 Secondary reference U.S. Government activity |
| NA69245 | D/9 Drawing number reference only U.S. Government activity |
| 607018 | 3/9 Design control — primary reference Siemens Government Technologies, Inc. Dba Sgt Dresser-Rand Div Sgt Dresser-Rand |
| NB6322PC306 | 5/9 Secondary reference U.S. Government activity |
| 306NC6111 | 5/9 Secondary reference U.S. Government activity |
NSN 4820-00-390-4262 is a Piston,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5330-01-559-5836. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-00-390-4262: Special Features: STEEL;2.990 IN.OD;1.250 IN.O/A H;0.287 IN. THK IN. 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.