The Valve,ball, cataloged under National Stock Number 4820-01-421-6540, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Portland Valve Llc. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-421-6540 |
| Primary Part Number | 1-1/2IN.A36TT |
| Item Name | Valve,ball |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Portland Valve Llc |
| Status | ACTIVE |
| Nominal Thread Size | 1.500 INCHES ALL ENDS IN |
| 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 |
|---|---|
| 1-1/2IN.A36TTSA | Metso Automation Ltd (GBR) |
| 1-1/2IN.A36TT | Metso Automation Ltd (GBR) |
| 1-1/2IN.A36TT PRIMARY | Portland Valve Llc (USA) |
NSN 4820-01-421-6540 is a Valve,ball, manufactured by Portland Valve Llc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-421-6540 has 3 manufacturer part numbers on file: 1-1/2IN.A36TTSA (Metso Automation Ltd), 1-1/2IN.A36TT (Metso Automation Ltd), 1-1/2IN.A36TT (Portland Valve Llc).
Key specifications for 1-1/2IN.A36TT: Nominal Thread Size: 1.500 INCHES ALL ENDS IN. 1 specification is 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.