The Disk,valve, cataloged under National Stock Number 4820-00-032-1740, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Eaton Aerospace, Llc Dba Jackson South. Government technical data includes 2 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 | 4820-00-032-1740 |
| Primary Part Number | 390501 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Eaton Aerospace, Llc Dba Jackson South |
| Status | ACTIVE |
| Style Designator | POPPET |
| Material | STEEL CORROSION RESISTING |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 390501 PRIMARY | Eaton Aerospace, Llc Dba Jackson South (USA) |
NSN 4820-00-032-1740 is a Disk,valve, manufactured by Eaton Aerospace, Llc Dba Jackson South, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-032-1740 has 1 manufacturer part number on file: 390501 (Eaton Aerospace, Llc Dba Jackson South).
1 possible match (shared part number, not a government interchangeability claim): 5970-01-438-9430. Verify interchangeability with system specifications before substitution.
Key specifications for 390501: Overall Height: 1.562 INCHES NOMINAL IN; Style Designator: POPPET; Special Features: SHANK END THD EXTERNALLY,1/4 IN. 28 UNJF-3A THD SIZE,0.590 IN. THD LG A; Material: STEEL CORROSION RESISTING. 2 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.
NSN 4820-00-032-1740 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.