The Seat,valve, cataloged under National Stock Number 4820-01-122-1665, 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 9 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-122-1665 |
| Primary Part Number | S-34501-1 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Grove Valve Operations |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.250 INCHES NOMINAL IN |
| Flange Diameter | 1.065 INCHES NOMINAL IN |
| Body Outside Diameter | 0.875 INCHES NOMINAL IN |
| Style Designator | PLAIN FLANGED |
| Body Inside Diameter | 0.250 INCHES NOMINAL IN |
| Under Flange Height | 0.200 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 |
|---|---|
| N-865 PIECE 20 | Grove Valve Operations (USA) |
| S-34501-1 PRIMARY | Grove Valve Operations (USA) |
| Reference | Meaning |
|---|---|
| N-930 | D/9 Drawing number reference only Grove Valve Operations |
| N-865 | D/9 Drawing number reference only Grove Valve Operations |
NSN 4820-01-122-1665 is a Seat,valve, manufactured by Grove Valve Operations, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-122-1665 has 2 manufacturer part numbers on file: N-865 PIECE 20 (Grove Valve Operations), S-34501-1 (Grove Valve Operations).
Key specifications for S-34501-1: Flange Seat to Disk End Height: 0.250 INCHES NOMINAL IN; Flange Diameter: 1.065 INCHES NOMINAL IN; Body Outside Diameter: 0.875 INCHES NOMINAL 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.