The Valve,check, cataloged under National Stock Number 4820-00-689-6743, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Stockham Valves and Fittings Inc. Government technical data includes 20 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 4820-00-689-6743 |
| Primary Part Number | B319Y-1/2IN |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Stockham Valves and Fittings Inc |
| Status | CANCELLED |
| Material | COPPER ALLOY FLOW CONTROL DEVICE |
| Valve Operation Method | AUTOMATIC |
| Maximum Operating Temp | 400.0 FAHRENHEIT FIRST RESPONSE DEGF |
| Material | COPPER ALLOY 836 BODY |
| Material Document and Classification | QQ-C-390,ALLOY D5/D/ FED SPEC SINGLE MATERIAL RESPONSE SEAT |
| Style Designator | STRAIGHT THRU |
| Connection Type | THREADED INTERNAL PIPE ALL ENDS |
| Connection Style | PLAIN, OPTIONAL END (PIPE) ALL ENDS |
| Operating Pressure | 125.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM FIRST RESPONSE LBS |
| Nominal Thread Size | 0.500 INCHES ALL ENDS IN |
| Maximum Operating Temp | 150.0 FAHRENHEIT SECOND RESPONSE DEGF |
| Media for Which Designed | STEAM FIRST RESPONSE |
| Operating Pressure | 200.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SECOND RESPONSE LBS |
| Material Document and Classification | QQ-C-390,ALLOY D5/D/ FED SPEC SINGLE MATERIAL RESPONSE BODY |
| Material | COPPER ALLOY 836 SEAT |
| Flow Control Device | DISK |
| Mounting Position | HORIZONTAL OR VERTICAL |
| Thread Series Designator | NPT ALL ENDS |
| Media for Which Designed | WATER-OIL-GAS SECOND RESPONSE |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Acquisition Status | CANCELLED |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| B319-1/2IN | Stockham Valves and Fittings Inc (USA) |
| B319Y-1/2IN PRIMARY | Stockham Valves and Fittings Inc (USA) |
| 406 | The Walworth Company (USA) |
| B319 | Stockham Valves and Fittings Inc (USA) |
NSN 4820-00-689-6743 is a Valve,check, manufactured by Stockham Valves and Fittings Inc, classified under FSC 4820 (No Item Name Available). Status: cancelled.
NSN 4820-00-689-6743 has 4 cross-referenced part numbers: B319-1/2IN (Stockham Valves and Fittings Inc), B319Y-1/2IN (Stockham Valves and Fittings Inc), 406 (The Walworth Company), B319 (Stockham Valves and Fittings Inc).
There are 12 known substitutes for 4820-00-689-6743: 4820-00-287-3097, 4820-00-287-3098, 4820-00-287-3114 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for B319Y-1/2IN: Material: COPPER ALLOY FLOW CONTROL DEVICE; Valve Operation Method: AUTOMATIC; Maximum Operating Temp: 400.0 FAHRENHEIT FIRST RESPONSE DEGF; Material: COPPER ALLOY 836 BODY. 20 total characteristics are documented in the Federal Logistics Information System.
NSN 4820-00-689-6743 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.