The Valve,check, cataloged under National Stock Number 4820-01-576-5445, 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 17 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 | 4820-01-576-5445 |
| Primary Part Number | 173507.150 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | W. & O. Supply, Inc. Div W&o Norfolk |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Connection Style | PLAIN, OPTIONAL END (PIPE) ALL ENDS |
| Mounting Position | HORIZONTAL |
| Connection Type | THREADED INTERNAL PIPE ALL ENDS |
| Style Designator | STRAIGHT THRU |
| Material Document and Classification | ASTM - A351 CF8M ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Operating Pressure | 150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Valve Size | 1.500 INCHES IN |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Nominal Thread Size | 0.750 INCHES ALL ENDS IN |
| Maximum Operating Temp | 200.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Disk Loading Method | WEIGHT |
| Face to Face Distance | 5.130 INCHES IN |
| Media for Which Designed | WATER-OIL-GAS SINGLE RESPONSE |
| Material | STEEL OVERALL |
| Thread Series Designator | NPT ALL ENDS |
| Valve Operation Method | AUTOMATIC |
| 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 |
|---|---|
| 173507.150 PRIMARY | W. & O. Supply, Inc. Div W&o Norfolk (USA) |
NSN 4820-01-576-5445 is a Valve,check, manufactured by W. & O. Supply, Inc. Div W&o Norfolk, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-576-5445 has 1 manufacturer part number on file: 173507.150 (W. & O. Supply, Inc. Div W&o Norfolk).
Key specifications for 173507.150: Flow Control Device: DISK; Connection Style: PLAIN, OPTIONAL END (PIPE) ALL ENDS; Mounting Position: HORIZONTAL; Connection Type: THREADED INTERNAL PIPE ALL ENDS. 17 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.