The Valve,check, cataloged under National Stock Number 4820-01-344-8994, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is O T S I. Government technical data includes 2 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-344-8994 |
| Primary Part Number | 6511197 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | O T S I |
| Status | ACTIVE |
| Flow Control Device | BALL |
| Style Designator | STRAIGHT THRU |
| 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 |
|---|---|
| 6511197 PRIMARY | O T S I (USA) |
| Reference | Meaning |
|---|---|
| 6511197 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 4820-01-344-8994 is a Valve,check, manufactured by O T S I, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-344-8994 has 1 manufacturer part number on file: 6511197 (O T S I).
Key specifications for 6511197: Flow Control Device: BALL; Style Designator: STRAIGHT THRU. 2 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.