The Flange,gland,valve, cataloged under National Stock Number 4820-01-483-7541, 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2 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-483-7541 |
| Item Name | Flange,gland,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Bolt Hole Quantity | 2 |
| Material | STEEL CORROSION RESISTING |
| 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 |
|---|---|
| 820-2177521 | D/9 Drawing number reference only U.S. Government activity |
| A-37561 | 3/2 Design control — primary reference U.S. Government activity |
| 820-2177521 PIECE 19 | 5/2 Secondary reference U.S. Government activity |
NSN 4820-01-483-7541 is a Flange,gland,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
4 possible matches (shared part number, not a government interchangeability claim): 4820-01-483-8129, 4820-01-483-8142, 4820-01-483-8145. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-01-483-7541: Bolt Hole Quantity: 2; Special Features: NEXT HIGHER ASSY VALVE,VENT; End Item Identification: LOS ANGELES CLASS SSN (688); Material: STEEL CORROSION RESISTING. 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.