The Valve,rotary,selector, cataloged under National Stock Number 4820-01-321-8469, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Isometrics Inc. Government technical data includes 9 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. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-321-8469 |
| Primary Part Number | 3418-0099 |
| Item Name | Valve,rotary,selector |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Isometrics Inc |
| Status | ACTIVE |
| Maximum Operating Temp and Media for Which Designed | 400.0 FAHRENHEIT FUEL/OIL, HYDROCARBON DEGF |
| Operating Pressure and Type | 150.0 POUNDS PER SQUARE INCH (PSI) AIR MAXIMUM REQUIRED LBS |
| Connection Type | THREADED INTERNAL PIPE |
| Flow Type | THREE-WAY |
| Nominal Thread Size | 0.250 INCHES IN |
| Body Material | COPPER ALLOY |
| Connection Quantity | 2 |
| Thread Series Designator | NPTF |
| Valve Operation Method | MANUAL |
| 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 |
|---|---|
| 3418-0099 PRIMARY | Isometrics Inc (USA) |
NSN 4820-01-321-8469 is a Valve,rotary,selector, manufactured by Isometrics Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-321-8469 has 1 manufacturer part number on file: 3418-0099 (Isometrics Inc).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-535-6874. Verify interchangeability with system specifications before substitution.
Key specifications for 3418-0099: Maximum Operating Temp and Media for Which Designed: 400.0 FAHRENHEIT FUEL/OIL, HYDROCARBON DEGF; Operating Pressure and Type: 150.0 POUNDS PER SQUARE INCH (PSI) AIR MAXIMUM REQUIRED LBS; Connection Type: THREADED INTERNAL PIPE; Flow Type: THREE-WAY. 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.