The Valve,check, cataloged under National Stock Number 4820-00-024-4667, 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 19 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 | 4820-00-024-4667 |
| Primary Part Number | L53300-20FF |
| 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 ALL ENDS |
| Flange Face Design | PLAIN ALL ENDS |
| Nominal Length | 2.188 INCHES ALL ENDS IN |
| Style Designator | STRAIGHT THRU FLANGED ENDS |
| Material Document and Classification | QQ-A-225/8,ALLOY 6061 FED SPEC SINGLE MATERIAL RESPONSE BODY |
| Material Document and Classification | QQ-S-764,COMP 303-CANCELED FED SPEC SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE |
| Bolt Hole Nominal Diameter | 0.250 INCHES ALL ENDS IN |
| Valve Size | 1.091 INCHES IN |
| Center to Center Nominal Distance Between Bolt Holes Along Width | 1.656 INCHES ALL ENDS IN |
| Disk Loading Method | SPRING |
| Bolt Hole Quantity | 4 ALL ENDS |
| Nominal Width | 2.188 INCHES ALL ENDS IN |
| Face to Face Distance | 2.500 INCHES IN |
| Center to Center Nominal Distance Between Bolt Holes Along Length | 1.656 INCHES ALL ENDS IN |
| Material | STEEL FLOW CONTROL DEVICE |
| Material | ALUMINUM ALLOY BODY |
| Valve Operation Method | AUTOMATIC |
| Nominal Thickness | 0.300 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 |
|---|---|
| GV500LT20FF | Northrop Grumman Systems Corporation (USA) |
| L53300-20FF PRIMARY | Lourdes Industries, Inc. (USA) |
NSN 4820-00-024-4667 is a Valve,check, manufactured by Lourdes Industries, Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-024-4667 has 2 manufacturer part numbers on file: GV500LT20FF (Northrop Grumman Systems Corporation), L53300-20FF (Lourdes Industries, Inc.).
Key specifications for L53300-20FF: Flow Control Device: POPPET; Flange Shape: RECTANGULAR WITH HOLES ALL ENDS; Flange Face Design: PLAIN ALL ENDS; Nominal Length: 2.188 INCHES ALL ENDS IN. 19 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.