The Valve,check, cataloged under National Stock Number 4820-01-121-8388, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is King Engineering Corporation Dba King-Gage Systems. Government technical data includes 16 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 | 4820-01-121-8388 |
| Primary Part Number | 6224-2 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | King Engineering Corporation Dba King-Gage Systems |
| Status | ACTIVE |
| Furnished Items and Quantity | 1 GASKET AND 1 TAILPIECE |
| Connection Style | PLAIN (TUBE) SECOND END |
| Connection Style | PLAIN (TUBE) FIRST END |
| Mounting Position | HORIZONTAL OR VERTICAL |
| Supplementary Features | FLOW CONTROL DEVICE: NEEDLE |
| Connection Type | THREADED EXTERNAL TUBE FIRST END |
| Connection Type | UNTHREADED INTERNAL TUBE SECOND END |
| Style Designator | STRAIGHT THRU |
| Nominal Outside Diameter Tube Accommodated | 0.188 INCHES SECOND END IN |
| Thread Direction | RIGHT-HAND FIRST END |
| Nominal Thread Size | 0.375 INCHES FIRST END IN |
| Thread Class | 2A FIRST END A |
| Thread Quantity Per Inch | 27 FIRST END |
| Material | COPPER ALLOY BODY |
| Thread Series Designator | UNS FIRST END |
| 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 |
|---|---|
| E4330ITEM3C | King Engineering Corporation Dba King-Gage Systems (USA) |
| 6224-2 PRIMARY | King Engineering Corporation Dba King-Gage Systems (USA) |
NSN 4820-01-121-8388 is a Valve,check, manufactured by King Engineering Corporation Dba King-Gage Systems, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-121-8388 has 2 manufacturer part numbers on file: E4330ITEM3C (King Engineering Corporation Dba King-Gage Systems), 6224-2 (King Engineering Corporation Dba King-Gage Systems).
1 possible match (shared part number, not a government interchangeability claim): 5305-01-652-2267. Verify interchangeability with system specifications before substitution.
Key specifications for 6224-2: Furnished Items and Quantity: 1 GASKET AND 1 TAILPIECE; Connection Style: PLAIN (TUBE) SECOND END; Connection Style: PLAIN (TUBE) FIRST END; Mounting Position: HORIZONTAL OR VERTICAL. 16 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.