The Seat,valve, cataloged under National Stock Number 4820-01-116-7802, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Grove Valve Operations. Government technical data includes 10 specifications, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-116-7802 |
| Primary Part Number | 145-00226 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Grove Valve Operations |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.151 INCHES NOMINAL IN |
| Flange Diameter | 0.450 INCHES NOMINAL IN |
| Body Outside Diameter | 0.374 INCHES NOMINAL IN |
| Body Stepped Inside Diameter | 0.184 INCHES NOMINAL SECOND STEP IN |
| Body Stepped Inside Diameter | 0.288 INCHES NOMINAL FIRST STEP IN |
| Style Designator | PLAIN FLANGED |
| Under Flange Height | 1.350 INCHES NOMINAL IN |
| Material | STEEL CORROSION RESISTING OVERALL |
| 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 |
|---|---|
| 145-00226 PRIMARY | Grove Valve Operations (USA) |
| N-903 SH 3 PIECE 25 | Grove Valve Operations (USA) |
| Reference | Meaning |
|---|---|
| N-903 | D/9 Drawing number reference only Grove Valve Operations |
NSN 4820-01-116-7802 is a Seat,valve, manufactured by Grove Valve Operations, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-116-7802 has 2 manufacturer part numbers on file: 145-00226 (Grove Valve Operations), N-903 SH 3 PIECE 25 (Grove Valve Operations).
Key specifications for 145-00226: Flange Seat to Disk End Height: 0.151 INCHES NOMINAL IN; Flange Diameter: 0.450 INCHES NOMINAL IN; Body Outside Diameter: 0.374 INCHES NOMINAL IN; Body Stepped Inside Diameter: 0.184 INCHES NOMINAL SECOND STEP IN. 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.