The Valve,vacuum Breaking, cataloged under National Stock Number 4820-01-302-9651, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Drs Photronics, Inc. Dba Drs Photronics, Inc.. Government technical data includes 17 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-302-9651 |
| Primary Part Number | 2314139 |
| Item Name | Valve,vacuum Breaking |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Drs Photronics, Inc. Dba Drs Photronics, Inc. |
| Status | ACTIVE |
| Flow Control Device | DISK, FLAT, TOP AND BOTTOM GUIDED |
| First End Thread Series Designator | UNEF |
| First End Thread Direction | RIGHT-HAND |
| Temp Rating | 160.0 FAHRENHEIT DEGF |
| Absolute Pressure Range | +1.0 TO 1.9 |
| Body Style | SINGLE CONNECTION, STRAIGHT FLOW |
| First End Seat Angle in Deg | 37.0 |
| First End Thread Class | 2A A |
| First End Style Designator | EXTERNAL SEAT FOR GASKET SEAL |
| End Connection Quantity | 1 |
| First End Connection Type | THREADED EXTERNAL TUBE |
| Temp Adjustability | NOT ADJUSTABLE |
| First End Outside Diameter Tube Accommodated | 0.879 INCHES NOMINAL IN |
| Material | ALUMINUM BODY |
| Media for Which Designed | AIR AND NITROGEN |
| Furnished Items | GASKET AND NUT |
| First End Nominal Thread Size | 1.000 INCHES 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 |
|---|---|
| 2314139 | Drs Photronics, Inc. Dba Drs Photronics, Inc. (USA) |
| Reference | Meaning |
|---|---|
| ZSP6-037-3 | 5/9 Secondary reference Zero Corp Zero-East Div |
| ZSP6-037-3 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-01-302-9651 is a Valve,vacuum Breaking, manufactured by Drs Photronics, Inc. Dba Drs Photronics, Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-302-9651 has 1 manufacturer part number on file: 2314139 (Drs Photronics, Inc. Dba Drs Photronics, Inc.).
Key specifications for 2314139: Flow Control Device: DISK, FLAT, TOP AND BOTTOM GUIDED; First End Thread Series Designator: UNEF; First End Thread Direction: RIGHT-HAND; Temp Rating: 160.0 FAHRENHEIT DEGF. 17 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.