The Seat,valve, cataloged under National Stock Number 4820-01-351-9972, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Fmc Technologies Inc Dba Fmc Fluid Control. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-351-9972 |
| Primary Part Number | 5263964 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Fmc Technologies Inc Dba Fmc Fluid Control |
| Status | ACTIVE |
| Flange Diameter | 3.406 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 |
|---|---|
| 5263964 PRIMARY | Fmc Technologies Inc Dba Fmc Fluid Control (USA) |
| 5263964 | Bae Systems Land & Armaments L.p. (USA) |
| Reference | Meaning |
|---|---|
| 5263964 | 5/9 Secondary reference Gulf Belting and Gasket Co Inc |
| 5263964 | 5/9 Secondary reference Idsc Holdings Dba Equiserv Dba Equiserv |
NSN 4820-01-351-9972 is a Seat,valve, manufactured by Fmc Technologies Inc Dba Fmc Fluid Control, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-351-9972 has 2 manufacturer part numbers on file: 5263964 (Fmc Technologies Inc Dba Fmc Fluid Control), 5263964 (Bae Systems Land & Armaments L.p.).
Key specifications for 5263964: Flange Diameter: 3.406 INCHES NOMINAL IN. 1 specification is 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.