The Seat,valve, cataloged under National Stock Number 4820-00-251-1556, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok. Government technical data includes 9 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-251-1556 |
| Primary Part Number | 80027-2 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.031 INCHES NOMINAL IN |
| Material | STEEL CORROSION RESISTING OR PLASTIC OVERALL |
| Seating Surface Shape | ANGULAR |
| Style Designator | PLAIN FLANGED |
| Seat Angle in Deg | 37.000 NOMINAL |
| Body Inside Diameter | 0.250 INCHES NOMINAL IN |
| Under Flange Height | 0.688 INCHES NOMINAL IN |
| Body Outside Diameter | 0.468 INCHES NOMINAL IN |
| Flange Diameter | 0.500 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| N8211G6Y/MM-1 ITEM 5 | Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok (USA) |
| 80027-2 PRIMARY | Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok (USA) |
| 80027-1 | Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok (USA) |
NSN 4820-00-251-1556 is a Seat,valve, manufactured by Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-00-251-1556 has 3 cross-referenced part numbers: N8211G6Y/MM-1 ITEM 5 (Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok), 80027-2 (Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok), 80027-1 (Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok).
There are 7 known substitutes for 4820-00-251-1556: 5905-00-117-4186, 5905-00-929-2444, 5905-01-059-1047 and 4 more. Verify interchangeability with system specifications before substitution.
Key specifications for 80027-2: Flange Seat to Disk End Height: 0.031 INCHES NOMINAL IN; Material: STEEL CORROSION RESISTING OR PLASTIC OVERALL; Seating Surface Shape: ANGULAR; Special Features: W/PLASTIC SEAT INSERT. 10 total characteristics are documented in the Federal Logistics Information System.