The Valve,check, cataloged under National Stock Number 4820-01-348-4263, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 29 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-348-4263 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Flange Shape | RECTANGULAR WITH HOLES ALL ENDS |
| Flange Face Design | PLAIN ALL ENDS |
| Surface Treatment Document and Classification | MIL-A-8625,TYPE 2 MIL SPEC SINGLE TREATMENT RESPONSE |
| Nominal Length | 4.000 INCHES ALL ENDS IN |
| Mounting Position | HORIZONTAL |
| Connection Type | FLANGE ALL ENDS |
| Style Designator | STRAIGHT THRU FLANGED ENDS |
| Material Document and Classification | MIL-S-5059 MIL SPEC SINGLE MATERIAL RESPONSE SEAT |
| Material Document and Classification | QQ-A-596 FED SPEC 1ST MATERIAL RESPONSE OR QQ-A-275/6 FED SPEC 2ND MATERIAL RESPONSE BODY |
| Material Document and Classification | QQ-A-596 FED SPEC 1ST MATERIAL RESPONSE OR QQ-A-275/6 FED SPEC 2ND MATERIAL RESPONSE FLOW CONTROL DEVICE |
| Bolt Hole Nominal Diameter | 0.174 INCHES ALL ENDS IN |
| Operating Pressure | 1.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Valve Size | 2.500 INCHES IN |
| Maximum Operating Temp | -54.0 FAHRENHEIT FIRST RESPONSE DEGF |
| Maximum Operating Temp | 43.0 FAHRENHEIT SECOND RESPONSE DEGF |
| Center to Center Nominal Distance Between Bolt Holes Along Width | 2.375 INCHES ALL ENDS IN |
| Mounting Facility | BRACKET(S) |
| Bolt Hole Quantity | 4 ALL ENDS |
| Surface Treatment | ANODIZE |
| Nominal Width | 3.250 INCHES ALL ENDS IN |
| Face to Face Distance | 1.420 INCHES IN |
| Center to Center Nominal Distance Between Bolt Holes Along Length | 2.625 INCHES ALL ENDS IN |
| Media for Which Designed | WATER-OIL-GAS SINGLE RESPONSE |
| Material | STEEL CORROSION RESISTING SEAT |
| Material | ALUMINUM ALLOY A356.0 OR ALUMINUM ALLOY 2024 BODY |
| Material | ALUMINUM ALLOY A356.0 OR ALUMINUM ALLOY 2024 FLOW CONTROL DEVICE |
| Valve Operation Method | AUTOMATIC |
| Nominal Thickness | 0.062 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 |
| Reference | Meaning |
|---|---|
| GV500AAW | 7/1 Vendor item drawing reference Northrop Grumman Systems Corporation |
| 2S6010 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-01-348-4263 is a Valve,check, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-348-4263: Flow Control Device: DISK; Flange Shape: RECTANGULAR WITH HOLES ALL ENDS; Flange Face Design: PLAIN ALL ENDS; Surface Treatment Document and Classification: MIL-A-8625,TYPE 2 MIL SPEC SINGLE TREATMENT RESPONSE. 29 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.