The Valve,check, cataloged under National Stock Number 4820-00-435-4393, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Thermo King Corporation Dba Phoenix Global Distirbution.. Government technical data includes 8 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 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 | 4820-00-435-4393 |
| Primary Part Number | 66-384 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Thermo King Corporation Dba Phoenix Global Distirbution. |
| Status | ACTIVE |
| Nominal Pipe Size Accommodated | 0.625 INCHES FIRST END IN |
| Connection Style | PLAIN (TUBE) ALL ENDS |
| Connection Type | THREADED EXTERNAL PIPE ALL ENDS |
| Style Designator | STRAIGHT THRU |
| Face to Face Distance | 3.375 INCHES IN |
| Material | COPPER ALLOY BODY |
| Material | PLASTIC SEAT |
| Material | COPPER ALLOY STEM |
| 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 |
|---|---|
| 66-384 PRIMARY | Thermo King Corporation Dba Phoenix Global Distirbution. (USA) |
NSN 4820-00-435-4393 is a Valve,check, manufactured by Thermo King Corporation Dba Phoenix Global Distirbution., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-435-4393 has 1 manufacturer part number on file: 66-384 (Thermo King Corporation Dba Phoenix Global Distirbution.).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-425-6890. Verify interchangeability with system specifications before substitution.
Key specifications for 66-384: Nominal Pipe Size Accommodated: 0.625 INCHES FIRST END IN; Connection Style: PLAIN (TUBE) ALL ENDS; Connection Type: THREADED EXTERNAL PIPE ALL ENDS; Style Designator: STRAIGHT THRU. 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.