The Valve,check, cataloged under National Stock Number 4820-00-262-8744, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Lourdes Industries, Inc.. Government technical data includes 25 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-262-8744 |
| Primary Part Number | L52200-12FN |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Lourdes Industries, Inc. |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Flange Shape | RECTANGULAR WITH HOLES SECOND END |
| Flange Face Design | PLAIN SECOND END |
| Surface Treatment Document and Classification | MIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE |
| Connection Style | PLAIN (TUBE) FIRST END |
| Nominal Length | 1.594 INCHES SECOND END IN |
| Mounting Position | VERTICAL |
| Connection Type | FLANGE SECOND END |
| Connection Type | UNTHREADED INTERNAL TUBE FIRST END |
| Style Designator | STRAIGHT THRU |
| Material Document and Classification | QQ-S-764,TYPE 303-CANCELED FED SPEC SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE |
| Bolt Hole Nominal Diameter | 0.188 INCHES SECOND END IN |
| Nominal Outside Diameter Tube Accommodated | 0.625 INCHES FIRST END IN |
| Operating Pressure | 400.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Center to Center Nominal Distance Between Bolt Holes Along Width | 1.156 INCHES SECOND END IN |
| Disk Loading Method | WEIGHT |
| Bolt Hole Quantity | 4 SECOND END |
| Surface Treatment | ANODIZE |
| Nominal Width | 1.594 INCHES SECOND END IN |
| Center to Center Nominal Distance Between Bolt Holes Along Length | 1.156 INCHES SECOND END IN |
| Media for Which Designed | FUEL/OIL, HYDROCARBON SINGLE RESPONSE |
| Material | STEEL COMP 303 FLOW CONTROL DEVICE |
| Material | ALUMINUM BODY |
| Valve Operation Method | AUTOMATIC |
| Nominal Thickness | 0.250 INCHES SECOND END 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 |
|---|---|
| L52200-12FN PRIMARY | Lourdes Industries, Inc. (USA) |
| Reference | Meaning |
|---|---|
| GV500LU12FN | 7/2 Vendor item drawing reference Northrop Grumman Systems Corporation |
NSN 4820-00-262-8744 is a Valve,check, manufactured by Lourdes Industries, Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-262-8744 has 1 manufacturer part number on file: L52200-12FN (Lourdes Industries, Inc.).
Key specifications for L52200-12FN: Flow Control Device: DISK; Flange Shape: RECTANGULAR WITH HOLES SECOND END; Flange Face Design: PLAIN SECOND END; Surface Treatment Document and Classification: MIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE. 25 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.