The Valve,check, cataloged under National Stock Number 4820-00-822-5721, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Spartan Hydraulics Inc. Government technical data includes 20 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-822-5721 |
| Primary Part Number | 103-4S |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Spartan Hydraulics Inc |
| Status | ACTIVE |
| Material | STEEL CORROSION RESISTING BODY |
| Flow Control Device | POPPET |
| Disk Loading Method | SPRING |
| Connection Style | FLARED (TUBE) ALL ENDS |
| Maximum Operating Temp | 500.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Mounting Position | HORIZONTAL OR VERTICAL |
| Thread Quantity Per Inch | 20 ALL ENDS |
| Nominal Thread Size | 0.438 INCHES ALL ENDS IN |
| Operating Pressure | 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Material | STEEL CORROSION RESISTING AND RUBBER SYNTHETIC FLOW CONTROL DEVICE |
| Seat Angle | 37.0 DEGREES ALL ENDS |
| Thread Class | 3A ALL ENDS A |
| Surface Treatment | PASSIVATE |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Valve Operation Method | AUTOMATIC |
| Style Designator | STRAIGHT THRU |
| Media for Which Designed | OIL, HYDRAULIC SINGLE RESPONSE |
| Thread Series Designator | UNF ALL ENDS |
| Material | STEEL CORROSION RESISTING SEAT |
| Connection Type | THREADED EXTERNAL TUBE ALL ENDS |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 103-4S | Spartan Hydraulics Inc |
NSN 4820-00-822-5721 is a Valve,check, manufactured by Spartan Hydraulics Inc, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-00-822-5721 has 1 cross-referenced part number: 103-4S (Spartan Hydraulics Inc).
There are 2 known substitutes for 4820-00-822-5721: 1660-00-333-0142, 5975-00-446-7782. Verify interchangeability with system specifications before substitution.
Key specifications for 103-4S: Material: STEEL CORROSION RESISTING BODY; Flow Control Device: POPPET; Disk Loading Method: SPRING; Connection Style: FLARED (TUBE) ALL ENDS. 20 total characteristics are documented in the Federal Logistics Information System.