The Valve,check, cataloged under National Stock Number 4820-01-248-3091, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Pall Aeropower Corp Sub of Pall Corp Mectron Industries Div. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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,check |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Pall Aeropower Corp Sub of Pall Corp Mectron Industries Div (CAGE 60047); Naval Sea Systems Command (CAGE 53711) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-248-3091 |
| Primary Part Number | WB0039441D8ZA |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Pall Aeropower Corp Sub of Pall Corp Mectron Industries Div |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| WB0039441D8ZA PRIMARY | Pall Aeropower Corp Sub of Pall Corp Mectron Industries Div (USA) |
| 6309962-127 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| AA-9500-D1950A | 5/9 Secondary reference Pall Aeropower Corp Sub of Pall Corp Mectron Industries Div |
| 6310226-131 | C/1 Advisory reference — outside the item-of-supply concept Naval Sea Systems Command |
NSN 4820-01-248-3091 is a Valve,check, manufactured by Pall Aeropower Corp Sub of Pall Corp Mectron Industries Div, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-248-3091 has 2 manufacturer part numbers on file: WB0039441D8ZA (Pall Aeropower Corp Sub of Pall Corp Mectron Industries Div), 6309962-127 (Naval Sea Systems Command).
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.