The Valve,vacuum Breaking, cataloged under National Stock Number 4820-01-243-0038, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Watts Regulator Company. Government technical data includes 12 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-243-0038 |
| Primary Part Number | SERIES 8A 3/4IN |
| Item Name | Valve,vacuum Breaking |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Watts Regulator Company |
| Status | ACTIVE |
| Flow Control Device | DISK, BOTTOM GUIDED |
| First End Thread Direction | RIGHT-HAND |
| Second End Relationship with First End | IDENTICAL |
| Body Style | SINGLE CONNECTION, STRAIGHT FLOW |
| First End Style Designator | SWIVEL NUT, GASKET SEAL |
| End Connection Quantity | 2 |
| First End Connection Type | THREADED INTERNAL HOSE |
| Temp Adjustability | NOT ADJUSTABLE |
| First End Inside Diameter Hose Accommodated | 0.500 INCHES NOMINAL IN |
| Material | COPPER ALLOY BODY |
| Material | RUBBER FLOW CONTROL DEVICE |
| Media for Which Designed | ANY ACCEPTABLE |
| 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 |
|---|---|
| SERIES 8A 3/4IN PRIMARY | Watts Regulator Company (USA) |
NSN 4820-01-243-0038 is a Valve,vacuum Breaking, manufactured by Watts Regulator Company, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-243-0038 has 1 manufacturer part number on file: SERIES 8A 3/4IN (Watts Regulator Company).
Key specifications for SERIES 8A 3/4IN: Flow Control Device: DISK, BOTTOM GUIDED; First End Thread Direction: RIGHT-HAND; Second End Relationship with First End: IDENTICAL; Body Style: SINGLE CONNECTION, STRAIGHT FLOW. 12 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.