The Valve,check, cataloged under National Stock Number 4820-01-247-0077, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Marco Seattle Inc Dba Marco. Government technical data includes 4 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-247-0077 |
| Primary Part Number | M56843 ITEM 41 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Marco Seattle Inc Dba Marco |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Mounting Position | HORIZONTAL OR VERTICAL |
| Style Designator | STRAIGHT THRU |
| Valve Operation Method | AUTOMATIC |
| 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 |
|---|---|
| M56843 ITEM 41 PRIMARY | Marco Seattle Inc Dba Marco (USA) |
| Reference | Meaning |
|---|---|
| CXCB-XFN-GAJ | C/1 Advisory reference — outside the item-of-supply concept Sun Hydraulics Corporation |
| M56843 | D/9 Drawing number reference only Marco Seattle Inc Dba Marco |
NSN 4820-01-247-0077 is a Valve,check, manufactured by Marco Seattle Inc Dba Marco, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-247-0077 has 1 manufacturer part number on file: M56843 ITEM 41 (Marco Seattle Inc Dba Marco).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-247-0225. Verify interchangeability with system specifications before substitution.
Key specifications for M56843 ITEM 41: Flow Control Device: DISK; Mounting Position: HORIZONTAL OR VERTICAL; Style Designator: STRAIGHT THRU; Valve Operation Method: AUTOMATIC. 4 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.