The Valve,check, cataloged under National Stock Number 4820-00-024-4692, 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 18 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-024-4692 |
| Primary Part Number | L53300-20FB |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Lourdes Industries, Inc. |
| Status | ACTIVE |
| Flow Control Device | POPPET |
| Flange Shape | RECTANGULAR WITH HOLES FIRST END |
| Flange Face Design | PLAIN ALL ENDS |
| Connection Style | PLAIN (TUBE) ALL ENDS |
| Nominal Length | 2.188 INCHES FIRST END IN |
| Style Designator | STRAIGHT THRU |
| Bolt Hole Nominal Diameter | 0.250 INCHES FIRST END IN |
| Nominal Outside Diameter Tube Accommodated | 1.250 INCHES ALL ENDS IN |
| Operating Pressure | 150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Center to Center Nominal Distance Between Bolt Holes Along Width | 1.656 INCHES FIRST END IN |
| Bolt Hole Quantity | 4 FIRST END |
| Nominal Width | 2.188 INCHES FIRST END IN |
| Center to Center Nominal Distance Between Bolt Holes Along Length | 1.656 INCHES FIRST END IN |
| Media for Which Designed | FUEL/OIL, HYDROCARBON SINGLE RESPONSE |
| Material | STEEL CORROSION RESISTING FLOW CONTROL DEVICE |
| Material | ALUMINUM ALLOY BODY |
| Valve Operation Method | AUTOMATIC |
| Nominal Thickness | 0.300 INCHES FIRST 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 |
|---|---|
| GV500LT20FB | Northrop Grumman Systems Corporation (USA) |
| L53300-20FB PRIMARY | Lourdes Industries, Inc. (USA) |
NSN 4820-00-024-4692 is a Valve,check, manufactured by Lourdes Industries, Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-024-4692 has 2 manufacturer part numbers on file: GV500LT20FB (Northrop Grumman Systems Corporation), L53300-20FB (Lourdes Industries, Inc.).
Key specifications for L53300-20FB: Flow Control Device: POPPET; Flange Shape: RECTANGULAR WITH HOLES FIRST END; Flange Face Design: PLAIN ALL ENDS; Connection Style: PLAIN (TUBE) ALL ENDS. 18 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.