The Valve,check, cataloged under National Stock Number 4820-01-575-8514, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Wheeler, Michael N Dba Phoenix Hydraulics and Controls. Government technical data includes 9 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 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 | 4820-01-575-8514 |
| Primary Part Number | ICT-B-20-N30 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Wheeler, Michael N Dba Phoenix Hydraulics and Controls |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Connection Style | PLAIN (TUBE) FIRST END |
| Connection Type | THREADED CARTRIDGE FIRST END |
| Style Designator | SCREW-IN CARTRIDGE |
| Valve Size | 1.625 INCHES IN |
| Disk Loading Method | SPRING |
| Material | STEEL OVERALL |
| Opening Pressure Setting | 30.0 POUNDS PER SQUARE INCH LBS |
| 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 |
|---|---|
| PH260710 ITEM 3 | Wheeler, Michael N Dba Phoenix Hydraulics and Controls (USA) |
| ICT-B-20-N30 PRIMARY | Wheeler, Michael N Dba Phoenix Hydraulics and Controls (USA) |
NSN 4820-01-575-8514 is a Valve,check, manufactured by Wheeler, Michael N Dba Phoenix Hydraulics and Controls, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-575-8514 has 2 manufacturer part numbers on file: PH260710 ITEM 3 (Wheeler, Michael N Dba Phoenix Hydraulics and Controls), ICT-B-20-N30 (Wheeler, Michael N Dba Phoenix Hydraulics and Controls).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-598-4859. Verify interchangeability with system specifications before substitution.
Key specifications for ICT-B-20-N30: Flow Control Device: DISK; Connection Style: PLAIN (TUBE) FIRST END; Connection Type: THREADED CARTRIDGE FIRST END; Style Designator: SCREW-IN CARTRIDGE. 9 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.