The Valve,check, cataloged under National Stock Number 4820-01-347-4346, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Kirby Morgan Dive Systems Inc. Government technical data includes 8 specifications, cited from the U.S. Government catalog. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-347-4346 |
| Primary Part Number | 555-195 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Kirby Morgan Dive Systems Inc |
| Status | ACTIVE |
| Connection Style | PLAIN (PIPE) FIRST END |
| Criticality Code Justification | FEAT |
| Connection Type | THREADED INTERNAL PIPE SECOND END |
| Connection Type | THREADED EXTERNAL PIPE FIRST END |
| Style Designator | STRAIGHT THRU |
| Operating Pressure | 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Maximum Operating Temp | 250.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Material | COPPER ALLOY OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| 592-6318201 | Naval Sea Systems Command (USA) |
| 555-195 PRIMARY | Kirby Morgan Dive Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| BK425496110 | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
NSN 4820-01-347-4346 is a Valve,check, manufactured by Kirby Morgan Dive Systems Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-347-4346 has 2 manufacturer part numbers on file: 592-6318201 (Naval Sea Systems Command), 555-195 (Kirby Morgan Dive Systems Inc).
Key specifications for 555-195: Connection Style: PLAIN (PIPE) FIRST END; Criticality Code Justification: FEAT; Connection Type: THREADED INTERNAL PIPE SECOND END; Connection Type: THREADED EXTERNAL PIPE FIRST END. 8 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.