The Disk,valve, cataloged under National Stock Number 4820-01-232-2570, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Steward Machine Co Inc. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-232-2570 |
| Primary Part Number | 649-552 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Steward Machine Co Inc |
| Status | ACTIVE |
| Material | STEEL |
| 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 |
|---|---|
| 60-649-552 | Camar Corp. (USA) |
| 649-552 PRIMARY | Steward Machine Co Inc (USA) |
| Reference | Meaning |
|---|---|
| 60-649 | D/9 Drawing number reference only Hardie-Tynes Co., Inc. |
| 649-552 | 3/9 Design control — primary reference Hardie-Tynes Co., Inc. |
| 60-649 PIECE 552 | 5/9 Secondary reference Hardie-Tynes Co., Inc. |
NSN 4820-01-232-2570 is a Disk,valve, manufactured by Steward Machine Co Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-232-2570 has 2 manufacturer part numbers on file: 60-649-552 (Camar Corp.), 649-552 (Steward Machine Co Inc).
1 possible match (shared part number, not a government interchangeability claim): 8465-01-556-1002. Verify interchangeability with system specifications before substitution.
Key specifications for 649-552: Material: STEEL. 1 specification is 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.