The Valve,check, cataloged under National Stock Number 4820-01-128-2961, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Ge Aviation Systems Llc Dba Ge Aviation Systems Llc. Government technical data includes 16 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 | 4820-01-128-2961 |
| Primary Part Number | AV18A1143-111 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Ge Aviation Systems Llc Dba Ge Aviation Systems Llc |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Flange Shape | ROUND ALL ENDS |
| Flange Face Design | PLAIN ALL ENDS |
| Mounting Position | HORIZONTAL OR VERTICAL |
| Connection Type | FLANGE ALL ENDS |
| Style Designator | STRAIGHT THRU FLANGED ENDS |
| Valve Size | 2.625 INCHES IN |
| Maximum Operating Temp | 1060.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Nominal Outside Diameter | 3.588 INCHES ALL ENDS IN |
| Disk Loading Method | SPRING |
| Surface Treatment | PASSIVATE |
| Face to Face Distance | 0.188 INCHES IN |
| Media for Which Designed | AIR SINGLE RESPONSE |
| Material | NICKEL ALLOY OVERALL |
| Valve Operation Method | AUTOMATIC |
| Nominal Thickness | 0.119 INCHES ALL ENDS 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 |
|---|---|
| AV18A1143-111 PRIMARY | Ge Aviation Systems Llc Dba Ge Aviation Systems Llc (USA) |
NSN 4820-01-128-2961 is a Valve,check, manufactured by Ge Aviation Systems Llc Dba Ge Aviation Systems Llc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-128-2961 has 1 manufacturer part number on file: AV18A1143-111 (Ge Aviation Systems Llc Dba Ge Aviation Systems Llc).
Key specifications for AV18A1143-111: Flow Control Device: DISK; Flange Shape: ROUND ALL ENDS; Flange Face Design: PLAIN ALL ENDS; Mounting Position: HORIZONTAL OR VERTICAL. 16 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.