The Valve,check, cataloged under National Stock Number 4820-01-559-9761, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is In Mar Systems Inc. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-559-9761 |
| Primary Part Number | 5010-001-01 ITEM NO 18 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | In Mar Systems Inc |
| Status | ACTIVE |
| Media for Which Designed | WATER, FRESH SINGLE RESPONSE |
| 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 |
|---|---|
| 5010-001-01 ITEM NO 18 PRIMARY | In Mar Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| IM-LCS1-5010-129 | 5/9 Secondary reference Wynn Marine Ltd |
| 5010-001-01 ITEM NO 18 | 5/9 Secondary reference Wynn Marine Ltd |
NSN 4820-01-559-9761 is a Valve,check, manufactured by In Mar Systems Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-559-9761 has 1 manufacturer part number on file: 5010-001-01 ITEM NO 18 (In Mar Systems Inc).
Key specifications for 5010-001-01 ITEM NO 18: Special Features: NHA: WINDOW WASH SYSTEM; Media for Which Designed: WATER, FRESH SINGLE RESPONSE; Part Name Assigned by Controlling Agency: AIR BLEED VALVE (1/4 INCH NTPF) IN; End Item Identification: NEW CONSTRUCTION LCS1. 1 specification is 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.