The Valve,vacuum Regulating, cataloged under National Stock Number 4820-00-952-9376, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Gast Mfg Corp. Government technical data includes 11 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-952-9376 |
| Primary Part Number | AA840 |
| Item Name | Valve,vacuum Regulating |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Gast Mfg Corp |
| Status | ACTIVE |
| Flow Control Device | DISK, FLAT |
| First End Thread Direction | RIGHT-HAND |
| Absolute Pressure Range | +0.0 TO 26.0 |
| Body Style | STRAIGHT THRU |
| First End Style Designator | PLAIN |
| End Connection Quantity | 1 |
| Body Material | COPPER ALLOY |
| First End Connection Type | THREADED EXTERNAL PIPE |
| Temp Adjustability | NOT ADJUSTABLE |
| First End Nominal Pipe Size Accommodated | 0.375 INCHES IN |
| Media for Which Designed | AIR |
| 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 |
|---|---|
| 499-020-128 | L3harris Interstate Electronics Corporation (USA) |
| AA840 PRIMARY | Gast Mfg Corp (USA) |
| Reference | Meaning |
|---|---|
| 898076 | 5/9 Secondary reference L3 Aviation Products, Inc. Dba L3 Technologies |
NSN 4820-00-952-9376 is a Valve,vacuum Regulating, manufactured by Gast Mfg Corp, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-952-9376 has 2 manufacturer part numbers on file: 499-020-128 (L3harris Interstate Electronics Corporation), AA840 (Gast Mfg Corp).
Key specifications for AA840: Flow Control Device: DISK, FLAT; First End Thread Direction: RIGHT-HAND; Absolute Pressure Range: +0.0 TO 26.0; Body Style: STRAIGHT THRU. 11 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.