The Valve,check, cataloged under National Stock Number 4820-00-720-1499, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Eaton Corporation Dba Eaton Inoac Div Eaton. Government technical data includes 18 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 4820-00-720-1499 |
| Primary Part Number | 131-4S |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Eaton Corporation Dba Eaton Inoac Div Eaton |
| Status | CANCELLED |
| Maximum Operating Temp | 450.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Flow Control Device | POPPET |
| Connection Style | FLARED (TUBE) ALL ENDS |
| Valve Operation Method | AUTOMATIC |
| Disk Loading Method | SPRING |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Connection Type | THREADED EXTERNAL TUBE ALL ENDS |
| Surface Treatment | PASSIVATE |
| Material | STEEL CORROSION RESISTING OVERALL |
| Operating Pressure | 4000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Media for Which Designed | HYDRAULIC FLUID, PHOSPHATE-ESTER BASE SINGLE RESPONSE |
| Seat Angle | 37.0 DEGREES ALL ENDS |
| Thread Series Designator | UNF ALL ENDS |
| Nominal Thread Size | 0.438 INCHES ALL ENDS IN |
| Style Designator | CROSS |
| Mounting Facility | THREADED FASTENER |
| Thread Class | 3A ALL ENDS A |
| Mounting Position | HORIZONTAL OR VERTICAL |
| Acquisition Status | CANCELLED |
| HAZMAT | No |
NSN 4820-00-720-1499 is a Valve,check, manufactured by Eaton Corporation Dba Eaton Inoac Div Eaton, classified under FSC 4820 (No Item Name Available). Status: cancelled.
NSN 4820-00-720-1499 has 2 cross-referenced part numbers: 131-4S (Eaton Corporation Dba Eaton Inoac Div Eaton), 2C5834 (Crissair Inc Div Esco Technologies).
There is 1 known substitute for 4820-00-720-1499: 3110-00-554-2987. Verify interchangeability with system specifications before substitution.
Key specifications for 131-4S: Maximum Operating Temp: 450.0 FAHRENHEIT SINGLE RESPONSE DEGF; Flow Control Device: POPPET; Connection Style: FLARED (TUBE) ALL ENDS; Valve Operation Method: AUTOMATIC. 19 total characteristics are documented in the Federal Logistics Information System.
NSN 4820-00-720-1499 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.