The Disk,valve, cataloged under National Stock Number 4820-01-133-7768, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Betts Industries, Inc.. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Item Name | Disk,valve |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Oshkosh Defense Llc (CAGE 75Q65); Betts Industries, Inc. (CAGE 13226) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-133-7768 |
| Primary Part Number | 3644-VT |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Betts Industries, Inc. |
| 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 |
|---|---|
| 2DY852 | Oshkosh Defense Llc (USA) |
| 3644-VT PRIMARY | Betts Industries, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 6238-4 | D/9 Drawing number reference only Betts Industries, Inc. |
| 6238-4-4 | 5/9 Secondary reference Betts Industries, Inc. |
| 034080V | C/1 Advisory reference — outside the item-of-supply concept Kovatch Corp. |
| 2DY852 | 5/9 Secondary reference Oshkosh Corp |
NSN 4820-01-133-7768 is a Disk,valve, manufactured by Betts Industries, Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-133-7768 has 2 manufacturer part numbers on file: 2DY852 (Oshkosh Defense Llc), 3644-VT (Betts Industries, Inc.).
1 possible match (shared part number, not a government interchangeability claim): 1005-01-464-1596. Verify interchangeability with system specifications before substitution.
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.