The Disk,valve, cataloged under National Stock Number 4820-00-218-1981, 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2 specifications, cited from the U.S. Government catalog. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4820-00-218-1981 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flange Diameter | 1.312 INCHES NOMINAL IN |
| Material | COPPER ALLOY |
| 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 |
|---|---|
| 182215-192 | 3/9 Design control — primary reference Siemens Energy, Inc. Dba Dresser-Rand |
| 182215-192 | 5/9 Secondary reference Ingersoll Rand Co |
| 182524PC192 | 5/9 Secondary reference U.S. Government activity |
| 182215-192 | 5/9 Secondary reference U.S. Government activity |
| 182524 | D/9 Drawing number reference only Ingersoll-Rand Company Dba Ingersoll-Rand |
| 3133458REVAPC192 | 5/9 Secondary reference U.S. Government activity |
| 182524PC192 | 5/9 Secondary reference Siemens Energy, Inc. Dba Dresser-Rand |
| 182524PC192 | 5/9 Secondary reference Ingersoll Rand Co |
NSN 4820-00-218-1981 is a Disk,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 5985-00-615-5181, 5815-00-910-7404. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-00-218-1981: Flange Diameter: 1.312 INCHES NOMINAL IN; Special Features: ONE END CHAMFERED,0.125 IN. BY 45.0 DEG. IN; Material: COPPER ALLOY. 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.