The Disk,valve, cataloged under National Stock Number 4820-01-019-2678, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Todd Combustion Inc. Government technical data includes 5 specifications, 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 6 items share a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-019-2678 |
| Primary Part Number | V1-3-44 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Todd Combustion Inc |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.530 INCHES NOMINAL IN |
| Outside Diameter | 3.170 INCHES NOMINAL IN |
| Style Designator | SWING CHECK |
| Under Flange Height | 0.530 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 |
| Part Number | Manufacturer |
|---|---|
| V1-3-44 PRIMARY | Todd Combustion Inc (USA) |
| 23601 PRIMARY | Todd Combustion Inc (USA) |
| Reference | Meaning |
|---|---|
| N47500GPC3 | 5/9 Secondary reference Todd Shipyards Corp Houston Div |
| ND41192PC3 | 5/9 Secondary reference Todd Shipyards Corp Houston Div |
| V-1-3-42 | C/1 Advisory reference — outside the item-of-supply concept Todd Combustion Inc |
| V1-33-34 | C/1 Advisory reference — outside the item-of-supply concept Todd Combustion Inc |
NSN 4820-01-019-2678 is a Disk,valve, manufactured by Todd Combustion Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-019-2678 has 2 manufacturer part numbers on file: V1-3-44 (Todd Combustion Inc), 23601 (Todd Combustion Inc).
6 possible matches (shared part number, not a government interchangeability claim): 5360-01-189-3607, 4820-01-220-6437, 4710-01-232-6012. Verify interchangeability with system specifications before substitution.
Key specifications for V1-3-44: Flange Seat to Disk End Height: 0.530 INCHES NOMINAL IN; Outside Diameter: 3.170 INCHES NOMINAL IN; Style Designator: SWING CHECK; Under Flange Height: 0.530 INCHES NOMINAL IN. 5 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.