The Flame Screen,vent Valve, cataloged under National Stock Number 4820-01-439-3910, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 2 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-439-3910 |
| Item Name | Flame Screen,vent Valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| General Characteristics Item Description | COMPONENT OF 2.500 IN.FLANGED INVERTED VENT CHECK VALVE IN |
| Material | STEEL CORROSION RESISTING |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| VV-0250-71105577 PC 7 | 3/9 Design control — primary reference Kings Point Machinery Inc Dba Kpm |
| VV-0250-71105577 | D/9 Drawing number reference only Kings Point Machinery Inc Dba Kpm |
NSN 4820-01-439-3910 is a Flame Screen,vent Valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4820-01-439-3915. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-01-439-3910: General Characteristics Item Description: COMPONENT OF 2.500 IN.FLANGED INVERTED VENT CHECK VALVE IN; Special Features: END ITEM VENT VALVE,KINGS POINT MACHINERY INC,MODEL 1027F,AND DWG NO.VV-0250-71105577; Material: STEEL CORROSION RESISTING. 2 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.