The Seat,valve, cataloged under National Stock Number 4820-00-866-9299, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Process Supply Inc Dba Defense Products International. Government technical data includes 8 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Parameter | Value |
|---|---|
| NSN | 4820-00-866-9299 |
| Primary Part Number | 15566V024-12 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Process Supply Inc Dba Defense Products International |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.046 INCHES NOMINAL IN |
| Flange Diameter | 0.937 INCHES NOMINAL IN |
| Body Outside Diameter | 0.875 INCHES NOMINAL IN |
| Style Designator | PLAIN FLANGED |
| Body Inside Diameter | 0.312 INCHES NOMINAL IN |
| Under Flange Height | 0.109 INCHES NOMINAL IN |
| Material | STEEL OVERALL |
| Seating Surface Shape | FLAT |
| 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 |
|---|---|
| 15566V024-12 PRIMARY | Process Supply Inc Dba Defense Products International (USA) |
| Reference | Meaning |
|---|---|
| 180P1041 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-00-866-9299 is a Seat,valve, manufactured by Process Supply Inc Dba Defense Products International, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-866-9299 has 1 manufacturer part number on file: 15566V024-12 (Process Supply Inc Dba Defense Products International).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-039-5697. Verify interchangeability with system specifications before substitution.
Key specifications for 15566V024-12: Flange Seat to Disk End Height: 0.046 INCHES NOMINAL IN; Flange Diameter: 0.937 INCHES NOMINAL IN; Body Outside Diameter: 0.875 INCHES NOMINAL IN; Style Designator: PLAIN FLANGED. 8 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.