The Piston,valve, cataloged under National Stock Number 4820-01-261-4159, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Marine Electronics, Llc Sales. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-261-4159 |
| Primary Part Number | CH5-1808 |
| Item Name | Piston,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Marine Electronics, Llc Sales |
| 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 |
|---|---|
| CH5-1808 PRIMARY | Marine Electronics, Llc Sales (USA) |
| 5152-F ITEM 22 | Marine Electronics, Llc Sales (USA) |
| Reference | Meaning |
|---|---|
| 5152-F | D/9 Drawing number reference only Marine Electronics, Llc Sales |
NSN 4820-01-261-4159 is a Piston,valve, manufactured by Marine Electronics, Llc Sales, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-261-4159 has 2 manufacturer part numbers on file: CH5-1808 (Marine Electronics, Llc Sales), 5152-F ITEM 22 (Marine Electronics, Llc Sales).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-262-0939. Verify interchangeability with system specifications before substitution.
Key specifications for CH5-1808: Special Features: ROUND SHAPE; USED ON VALVE. 0 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.