The Seat,valve, cataloged under National Stock Number 4820-00-964-4859, 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 6 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 | 4820-00-964-4859 |
| Primary Part Number | 170911 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Eaton Aerospace, Llc Dba Jackson South |
| Status | ACTIVE |
| Body Outside Diameter | 0.876 INCHES NOMINAL IN |
| Style Designator | PLAIN |
| Body Inside Diameter | 0.315 INCHES NOMINAL IN |
| Seat Radius | 32.000 INCHES NOMINAL IN |
| Material | STEEL OVERALL |
| Seating Surface Shape | RADIAL |
| 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 |
|---|---|
| 170911 PRIMARY | Eaton Aerospace, Llc Dba Jackson South (USA) |
NSN 4820-00-964-4859 is a Seat,valve, manufactured by Eaton Aerospace, Llc Dba Jackson South, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-964-4859 has 1 manufacturer part number on file: 170911 (Eaton Aerospace, Llc Dba Jackson South).
1 possible match (shared part number, not a government interchangeability claim): 4120-01-399-6015. Verify interchangeability with system specifications before substitution.
Key specifications for 170911: Overall Height: 0.370 INCHES NOMINAL IN; Body Outside Diameter: 0.876 INCHES NOMINAL IN; Style Designator: PLAIN; Body Inside Diameter: 0.315 INCHES NOMINAL IN. 6 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.