The Valve,check, cataloged under National Stock Number 4820-01-696-3011, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is W. & O. Supply, Inc. Div W&o Norfolk. 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 | 4820-01-696-3011 |
| Primary Part Number | 052503.500 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | W. & O. Supply, Inc. Div W&o Norfolk |
| Status | ACTIVE |
| Flange Shape | ROUND ALL ENDS |
| Furnished Items and Quantity | 4 BOLT |
| Flange Face Design | PLAIN ALL ENDS |
| Mounting Position | HORIZONTAL |
| Connection Type | FLANGE ALL ENDS |
| Style Designator | STRAIGHT THRU FLANGED ENDS |
| Bolt Hole Nominal Diameter | 6.00 INCHES ALL ENDS IN |
| Operating Pressure | 150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Valve Size | 3.0 INCHES IN |
| Maximum Operating Temp | 550.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Bolt Hole Quantity | 4 FIRST END |
| Face to Face Distance | 9.49 INCHES IN |
| Media for Which Designed | LIQUID SECOND RESPONSE |
| Media for Which Designed | GAS, NATURAL FIRST RESPONSE |
| First Connection Face to Centerline Distance | 6.30 INCHES IN |
| Opening Pressure Setting | 150.0 POUNDS PER SQUARE INCH LBS |
| 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 |
|---|---|
| 052503.500 PRIMARY | W. & O. Supply, Inc. Div W&o Norfolk (USA) |
NSN 4820-01-696-3011 is a Valve,check, manufactured by W. & O. Supply, Inc. Div W&o Norfolk, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-696-3011 has 1 manufacturer part number on file: 052503.500 (W. & O. Supply, Inc. Div W&o Norfolk).
Key specifications for 052503.500: Flange Shape: ROUND ALL ENDS; Furnished Items and Quantity: 4 BOLT; Flange Face Design: PLAIN ALL ENDS; Mounting Position: HORIZONTAL. 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.