The Seat,valve, cataloged under National Stock Number 4820-00-592-8201, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 9 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-00-592-8201 |
| Primary Part Number | F3291899PC436 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.312 INCHES NOMINAL IN |
| Flange Diameter | 2.740 INCHES MINIMUM AND 2.745 INCHES MAXIMUM IN |
| Taper Minor Diameter | 1.437 INCHES MINIMUM AND 1.442 INCHES MAXIMUM IN |
| Style Designator | PLAIN FLANGED |
| Taper Major Diameter | 2.125 INCHES NOMINAL IN |
| Body Inside Diameter | 1.437 INCHES MINIMUM AND 1.442 INCHES MAXIMUM IN |
| Taper Length | 0.812 INCHES NOMINAL IN |
| Seat Radius | 0.250 INCHES NOMINAL IN |
| Under Flange Height | 0.812 INCHES NOMINAL IN |
| 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 |
|---|---|
| F3291899PC436 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 218-436 | 3/9 Design control — primary reference Hardie-Tynes Co., Inc. |
| 60-276PC436 | 5/9 Secondary reference Hardie-Tynes Co., Inc. |
| 60-218PC436 | 5/9 Secondary reference Hardie-Tynes Co., Inc. |
NSN 4820-00-592-8201 is a Seat,valve, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-592-8201 has 1 manufacturer part number on file: F3291899PC436 (Naval Sea Systems Command).
1 possible match (shared part number, not a government interchangeability claim): 5310-01-606-4192. Verify interchangeability with system specifications before substitution.
Key specifications for F3291899PC436: Flange Seat to Disk End Height: 0.312 INCHES NOMINAL IN; Flange Diameter: 2.740 INCHES MINIMUM AND 2.745 INCHES MAXIMUM IN; Taper Minor Diameter: 1.437 INCHES MINIMUM AND 1.442 INCHES MAXIMUM IN; Style Designator: PLAIN FLANGED. 9 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.