The Valve,diaphragm,stop, cataloged under National Stock Number 4820-01-330-0550, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Meritor Heavy Vehicle Systems, Llc. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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.
| Item Name | Valve,diaphragm,stop |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Meritor Heavy Vehicle Systems, Llc (CAGE 78500); Meritor Industrial Products, Llc (CAGE 3D6E9) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-330-0550 |
| Primary Part Number | A-3261-L-350 |
| Item Name | Valve,diaphragm,stop |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Meritor Heavy Vehicle Systems, Llc |
| Status | ACTIVE |
| 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 |
|---|---|
| A-3261-L-350 PRIMARY | Meritor Heavy Vehicle Systems, Llc (USA) |
| A-3261-L-350 | Meritor Industrial Products, Llc (USA) |
| Reference | Meaning |
|---|---|
| E8HZ4497-C | C/1 Advisory reference — outside the item-of-supply concept Ford Motor Company |
| A-3261-L-350S | D/9 Drawing number reference only Meritor Heavy Vehicle Systems, Llc |
NSN 4820-01-330-0550 is a Valve,diaphragm,stop, manufactured by Meritor Heavy Vehicle Systems, Llc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-330-0550 has 2 manufacturer part numbers on file: A-3261-L-350 (Meritor Heavy Vehicle Systems, Llc), A-3261-L-350 (Meritor Industrial Products, Llc).
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.