The Valve,check, cataloged under National Stock Number 4820-01-422-4112, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Fluid Line Products Inc. Government technical data includes 23 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-422-4112 |
| Primary Part Number | 9201297 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Fluid Line Products Inc |
| Status | ACTIVE |
| Surface Treatment Document and Classification | P MFR REF SINGLE TREATMENT RESPONSE |
| Connection Style | GASKET SEAL (TUBE) SECOND END |
| Connection Style | SWIVEL NUT, GASKET SEAL (TUBE) FIRST END |
| Connection Style | GASKET SEAL (TUBE) THIRD END |
| Mounting Position | HORIZONTAL OR VERTICAL |
| Supplementary Features | FLOW CONTROL DEVICE: PLUG |
| Connection Type | THREADED EXTERNAL TUBE THIRD END |
| Connection Type | THREADED EXTERNAL TUBE SECOND END |
| Connection Type | THREADED INTERNAL TUBE FIRST END |
| Style Designator | CROSS |
| Nominal Outside Diameter Tube Accommodated | 0.625 INCHES ALL ENDS IN |
| Operating Pressure | 20670.0 KILOPASCALS (KPA) MAXIMUM SINGLE RESPONSE |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Nominal Thread Size | 1.000 INCHES ALL ENDS IN |
| Surface Treatment | ZINC AND CHROMATE |
| Thread Class | 2A SECOND END A |
| Thread Class | 2A THIRD END A |
| Thread Class | 2B FIRST END |
| Thread Quantity Per Inch | 14 ALL ENDS |
| Material | STEEL OVERALL |
| Thread Series Designator | UNS ALL ENDS |
| Opening Pressure Setting | 450.0 KILOPASCALS |
| 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 |
|---|---|
| 9201297 | Fluid Line Products Inc (USA) |
| Reference | Meaning |
|---|---|
| 2793143 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-01-422-4112 is a Valve,check, manufactured by Fluid Line Products Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-422-4112 has 1 manufacturer part number on file: 9201297 (Fluid Line Products Inc).
Key specifications for 9201297: Surface Treatment Document and Classification: P MFR REF SINGLE TREATMENT RESPONSE; Connection Style: GASKET SEAL (TUBE) SECOND END; Connection Style: SWIVEL NUT, GASKET SEAL (TUBE) FIRST END; Connection Style: GASKET SEAL (TUBE) THIRD END. 23 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.