The Valve,check, cataloged under National Stock Number 4820-00-705-9506, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Eaton Aerospace Llc. Government technical data includes 18 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, 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 | 4820-00-705-9506 |
| Primary Part Number | 103-8S |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Eaton Aerospace Llc |
| Status | ACTIVE |
| Thread Class | 3A ALL ENDS A |
| Media for Which Designed | HYDRAULIC FLUID, PETROLEUM BASE SECOND RESPONSE |
| Flow Control Device | POPPET |
| Mounting Position | HORIZONTAL OR VERTICAL |
| Material | STEEL CORROSION RESISTING FLOW CONTROL DEVICE |
| Thread Series Designator | UNF ALL ENDS |
| Media for Which Designed | OIL, HYDRAULIC FIRST RESPONSE |
| Style Designator | STRAIGHT THRU |
| Material | STEEL CORROSION RESISTING OR STEEL COMP 316 BODY |
| Operating Pressure | 4000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Seat Angle | 37.0 DEGREES ALL ENDS |
| Nominal Thread Size | 0.750 INCHES ALL ENDS IN |
| Disk Loading Method | SPRING |
| Media for Which Designed | AIR THIRD RESPONSE |
| Connection Style | FLARED (TUBE) ALL ENDS |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Connection Type | THREADED EXTERNAL TUBE ALL ENDS |
| Valve Operation Method | AUTOMATIC |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
NSN 4820-00-705-9506 is a Valve,check, manufactured by Eaton Aerospace Llc, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-00-705-9506 has 3 cross-referenced part numbers: 103-8S (Spartan Hydraulics Inc), 103-8S (Eaton Corporation Dba Eaton Inoac Div Eaton), 103-8S (Eaton Aerospace Llc).
There are 2 known substitutes for 4820-00-705-9506: 5325-00-171-5950, 5330-00-354-0975. Verify interchangeability with system specifications before substitution.
Key specifications for 103-8S: Thread Class: 3A ALL ENDS A; Media for Which Designed: HYDRAULIC FLUID, PETROLEUM BASE SECOND RESPONSE; Flow Control Device: POPPET; Mounting Position: HORIZONTAL OR VERTICAL. 18 total characteristics are documented in the Federal Logistics Information System.