The Valve,check, cataloged under National Stock Number 4820-00-460-0064, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Essex Electro Engineers 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-460-0064 |
| Primary Part Number | A265-1527 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Essex Electro Engineers Inc |
| Status | ACTIVE |
| Flow Control Device | BALL |
| Renewable Seat Ring Type | THREADED |
| Connection Style | FLARED (TUBE) SECOND END |
| Connection Style | PLAIN (PIPE) FIRST END |
| Mounting Position | HORIZONTAL OR VERTICAL |
| Connection Type | THREADED EXTERNAL TUBE SECOND END |
| Connection Type | THREADED EXTERNAL PIPE FIRST END |
| Style Designator | STRAIGHT THRU |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Nominal Thread Size | 0.437 INCHES SECOND END IN |
| Nominal Thread Size | 0.125 INCHES FIRST END IN |
| Seat Angle | 20.0 DEGREES SECOND END |
| Disk Loading Method | SPRING |
| Thread Class | 2A SECOND END A |
| Thread Series Designator | NPT FIRST END |
| Thread Series Designator | UNF SECOND END |
| Valve Operation Method | AUTOMATIC |
| 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 |
|---|---|
| A265-1527 PRIMARY | Essex Electro Engineers Inc (USA) |
NSN 4820-00-460-0064 is a Valve,check, manufactured by Essex Electro Engineers Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-460-0064 has 1 manufacturer part number on file: A265-1527 (Essex Electro Engineers Inc).
Key specifications for A265-1527: Flow Control Device: BALL; Renewable Seat Ring Type: THREADED; Connection Style: FLARED (TUBE) SECOND END; Connection Style: PLAIN (PIPE) FIRST END. 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.