The Valve,check, cataloged under National Stock Number 4820-01-491-3923, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Eaton Corporation Dba Eaton Inoac. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-491-3923 |
| Primary Part Number | 61529AZ |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Eaton Corporation Dba Eaton Inoac |
| 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 |
| Part Number | Manufacturer |
|---|---|
| 61529AZ PRIMARY | Eaton Corporation Dba Eaton Inoac (USA) |
| Reference | Meaning |
|---|---|
| 542-7479664 | D/9 Drawing number reference only Naval Sea Systems Command |
| 542-7479664 PIECE 2 | 5/9 Secondary reference Naval Sea Systems Command |
NSN 4820-01-491-3923 is a Valve,check, manufactured by Eaton Corporation Dba Eaton Inoac, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-491-3923 has 1 manufacturer part number on file: 61529AZ (Eaton Corporation Dba Eaton Inoac).
1 possible match (shared part number, not a government interchangeability claim): 4730-01-491-4357. Verify interchangeability with system specifications before substitution.
Key specifications for 61529AZ: Special Features: JP-5 HOSE FLUSHING ADAPTER CONVERSION KIT. 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.