The Seat,valve, cataloged under National Stock Number 4820-00-433-3016, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok. Government technical data includes 10 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. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-433-3016 |
| Primary Part Number | 80027-6 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.170 INCHES NOMINAL IN |
| Flange Diameter | 0.493 INCHES NOMINAL IN |
| Body Outside Diameter | 0.312 INCHES NOMINAL IN |
| Style Designator | PLAIN FLANGED |
| Body Inside Diameter | 0.250 INCHES NOMINAL IN |
| Under Flange Height | 0.036 INCHES NOMINAL IN |
| Material | COPPER ALLOY BODY |
| Material | PLASTIC POLYTETRAFLUOROETHYLENE SEAT |
| Seat Angle in Deg | 45.000 NOMINAL |
| Seating Surface Shape | ANGULAR |
| 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 |
|---|---|
| 80027-6 PRIMARY | Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok (USA) |
NSN 4820-00-433-3016 is a Seat,valve, manufactured by Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-433-3016 has 1 manufacturer part number on file: 80027-6 (Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok).
4 possible matches (shared part number, not a government interchangeability claim): 5820-00-519-9362, 5355-00-644-4114, 1560-00-776-3221. Verify interchangeability with system specifications before substitution.
Key specifications for 80027-6: Flange Seat to Disk End Height: 0.170 INCHES NOMINAL IN; Flange Diameter: 0.493 INCHES NOMINAL IN; Body Outside Diameter: 0.312 INCHES NOMINAL IN; Style Designator: PLAIN FLANGED. 10 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.