The Valve,check, cataloged under National Stock Number 4820-01-596-2222, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Cla-Val Co. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-596-2222 |
| Primary Part Number | 81M |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Cla-Val Co |
| 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 |
|---|---|
| 81M PRIMARY | Cla-Val Co (USA) |
NSN 4820-01-596-2222 is a Valve,check, manufactured by Cla-Val Co, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-596-2222 has 1 manufacturer part number on file: 81M (Cla-Val Co).
Key specifications for 81M: Special Features: USED IN AFFF PIPING SYSTEM APPLICATIONS; UNION ENDS IAW MIL-F-1183; Part Name Assigned by Controlling Agency: SPRING LOADED DIAPHRAGM ACTUATED CHECK 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.