The Valve,expansion, cataloged under National Stock Number 4820-01-719-8510, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Cospolich Inc.. Government technical data includes 8 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-719-8510 |
| Primary Part Number | RWEV39 |
| Item Name | Valve,expansion |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Cospolich Inc. |
| Status | ACTIVE |
| Second End Relationship with First End | NOT IDENTICAL |
| First End Style Designator | PLAIN |
| End Connection Quantity | 2 |
| Second End Style Designator | PLAIN |
| First End Connection Type | UNTHREADED INTERNAL TUBE |
| First End Outside Diameter Tube Accommodated | 0.250 INCHES NOMINAL IN |
| Second End Connection Type | UNTHREADED INTERNAL TUBE |
| Second End Outside Diameter Tube Accommodated | 0.50 INCHES NOMINAL IN |
| 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 |
|---|---|
| 93816.1 REV A ITEM NO. 29 | Cospolich Inc. (USA) |
| RWEV39 PRIMARY | Cospolich Inc. (USA) |
| Reference | Meaning |
|---|---|
| 93816.1/REV A | D/9 Drawing number reference only Cospolich Inc. |
NSN 4820-01-719-8510 is a Valve,expansion, manufactured by Cospolich Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-719-8510 has 2 manufacturer part numbers on file: 93816.1 REV A ITEM NO. 29 (Cospolich Inc.), RWEV39 (Cospolich Inc.).
1 possible match (shared part number, not a government interchangeability claim): 5910-01-721-9124. Verify interchangeability with system specifications before substitution.
Key specifications for RWEV39: Second End Relationship with First End: NOT IDENTICAL; First End Style Designator: PLAIN; End Connection Quantity: 2; Second End Style Designator: PLAIN. 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.