The Disk,valve, cataloged under National Stock Number 4820-01-368-1576, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Donaldson Company, Inc.. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-368-1576 |
| Primary Part Number | 327961 ITEM 1 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Donaldson Company, Inc. |
| Status | ACTIVE |
| 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 |
| Part Number | Manufacturer |
|---|---|
| 327961 ITEM 1 PRIMARY | Donaldson Company, Inc. (USA) |
| 227985 | Donaldson Company, Inc. (USA) |
| 430621 ITEM 16 | Donaldson Company, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 430621 | D/9 Drawing number reference only Donaldson Company, Inc. |
| 431384 ITEM 16 | C/1 Advisory reference — outside the item-of-supply concept Donaldson Company, Inc. |
NSN 4820-01-368-1576 is a Disk,valve, manufactured by Donaldson Company, Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-368-1576 has 3 manufacturer part numbers on file: 327961 ITEM 1 (Donaldson Company, Inc.), 227985 (Donaldson Company, Inc.), 430621 ITEM 16 (Donaldson Company, Inc.).
2 possible matches (shared part number, not a government interchangeability claim): 4820-01-368-9942, 3020-01-593-4176. Verify interchangeability with system specifications before substitution.
Key specifications for 327961 ITEM 1: Material: STEEL CORROSION RESISTING. 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.