The Valve,vacuum Breaking, cataloged under National Stock Number 4820-01-017-2674, 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 11 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-017-2674 |
| Primary Part Number | LF288A |
| Item Name | Valve,vacuum Breaking |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Watts Regulator Company |
| Status | ACTIVE |
| Flow Control Device | DISK, LIFT |
| First End Thread Direction | RIGHT-HAND |
| Temp Rating | 210.0 FAHRENHEIT DEGF |
| Second End Relationship with First End | IDENTICAL |
| Body Style | SINGLE CONNECTION ANGLE FLOW |
| First End Style Designator | PLAIN |
| End Connection Quantity | 2 |
| First End Connection Type | THREADED INTERNAL HOSE |
| Temp Adjustability | NOT ADJUSTABLE |
| First End Inside Diameter Hose Accommodated | 0.750 INCHES NOMINAL IN |
| Material | COPPER ALLOY BODY |
| 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 |
|---|---|
| LF288A PRIMARY | Watts Regulator Company (USA) |
| Reference | Meaning |
|---|---|
| 75-7550-225 | 5/9 Secondary reference Adamation Inc Dba Adamation |
| 75-7550-210 | 5/9 Secondary reference Adamation Inc Dba Adamation |
| 75-7550-205 | 5/9 Secondary reference Adamation Inc Dba Adamation |
| 288A-C | 5/9 Secondary reference Watts Regulator Company |
NSN 4820-01-017-2674 is a Valve,vacuum Breaking, manufactured by Watts Regulator Company, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-017-2674 has 1 manufacturer part number on file: LF288A (Watts Regulator Company).
Key specifications for LF288A: Flow Control Device: DISK, LIFT; First End Thread Direction: RIGHT-HAND; Temp Rating: 210.0 FAHRENHEIT DEGF; Second End Relationship with First End: IDENTICAL. 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.