The Valve,check, cataloged under National Stock Number 4820-01-598-4859, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Inserta Products Inc. Government technical data includes 14 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-598-4859 |
| Primary Part Number | ICT-B-20-N30 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Inserta Products Inc |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Connection Style | PLAIN (SCREW-IN CARTRIDGE) ALL ENDS |
| Connection Type | THREADED EXTERNAL BOSS ALL ENDS |
| Style Designator | SCREW-IN CARTRIDGE |
| Operating Pressure | 5000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Valve Size | 1.1625 INCHES IN |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Nominal Thread Size | 1.625 INCHES ALL ENDS IN |
| Maximum Operating Temp | 175.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Media for Which Designed | HYDRAULIC FLUID, PETROLEUM BASE SINGLE RESPONSE |
| Thread Quantity Per Inch | 12 ALL ENDS |
| Material | STEEL BODY |
| Material | RUBBER SYNTHETIC PACKING |
| 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 |
|---|---|
| ICT-B-20-N30 PRIMARY | Inserta Products Inc (USA) |
NSN 4820-01-598-4859 is a Valve,check, manufactured by Inserta Products Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-598-4859 has 1 manufacturer part number on file: ICT-B-20-N30 (Inserta Products Inc).
Key specifications for ICT-B-20-N30: Flow Control Device: DISK; Connection Style: PLAIN (SCREW-IN CARTRIDGE) ALL ENDS; Connection Type: THREADED EXTERNAL BOSS ALL ENDS; Style Designator: SCREW-IN CARTRIDGE. 14 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.