The Disk,valve, cataloged under National Stock Number 4820-00-442-3835, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Triumph Engine Control Systems Llc. Government technical data includes 4 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 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 | 4820-00-442-3835 |
| Primary Part Number | 98804 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Triumph Engine Control Systems Llc |
| Status | ACTIVE |
| Shank Diameter | 0.504 INCHES NOMINAL IN |
| Flange Diameter | 0.750 INCHES NOMINAL IN |
| Style Designator | POPPET |
| 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 |
|---|---|
| 98804 PRIMARY | Triumph Engine Control Systems Llc (USA) |
NSN 4820-00-442-3835 is a Disk,valve, manufactured by Triumph Engine Control Systems Llc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-442-3835 has 1 manufacturer part number on file: 98804 (Triumph Engine Control Systems Llc).
1 possible match (shared part number, not a government interchangeability claim): 5306-00-882-9342. Verify interchangeability with system specifications before substitution.
Key specifications for 98804: Shank Diameter: 0.504 INCHES NOMINAL IN; Flange Diameter: 0.750 INCHES NOMINAL IN; Overall Height: 0.450 INCHES NOMINAL IN; Style Designator: POPPET. 4 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.