The Valve,check, cataloged under National Stock Number 4820-00-857-8247, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Circor Aerospace, Inc. Dba Circor Aerospace Inc. Government technical data includes 20 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-857-8247 |
| Primary Part Number | P6-300 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Circor Aerospace, Inc. Dba Circor Aerospace Inc |
| Status | ACTIVE |
| Operating Pressure | 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Test Data Document | 36659-668455 DRAWING (THIS IS THE BASIC GOVERNING DRAWING, SUCH AS A CONTRACTOR DRAWING, ORIGINAL EQUIPMENT MANUFACTURER DRAWING, ETC.; EXCLUDES ANY SPECIFICATION, STANDARD OR OTHER DOCUMENT THAT MAY BE REFERENCED IN A BASIC GOVERNING DRAWING) |
| Style Designator | STRAIGHT THRU |
| Media for Which Designed | HYDRAULIC FLUID, PHOSPHATE-ESTER BASE SINGLE RESPONSE |
| Thread Series Designator | UNF FIRST END |
| Thread Class | 3A FIRST END A |
| Surface Treatment Document and Classification | MIL-A-8625,TY 1 MIL SPEC SINGLE TREATMENT RESPONSE |
| Disk Loading Method | SPRING |
| Surface Treatment | ANODIZE |
| Thread Direction | RIGHT-HAND FIRST END |
| Nominal Thread Size | 0.438 INCHES FIRST END IN |
| Seat Angle | 37.0 DEGREES FIRST END |
| Nominal Outside Diameter Tube Accommodated | 0.250 INCHES FIRST END IN |
| Material | ALUMINUM ALLOY SEAT |
| Thread Quantity Per Inch | 20 FIRST END |
| Flow Control Device | POPPET |
| Connection Type | THREADED EXTERNAL TUBE FIRST END |
| Material | ALUMINUM ALLOY 2024 BODY |
| Connection Style | FLARED (TUBE) FIRST END |
| Mounting Position | HORIZONTAL |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
NSN 4820-00-857-8247 is a Valve,check, manufactured by Circor Aerospace, Inc. Dba Circor Aerospace Inc, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-00-857-8247 has 3 cross-referenced part numbers: 668455-1 (Lockheed Martin Corp), 668455 (Lockheed Martin Corp), P6-300 (Circor Aerospace, Inc. Dba Circor Aerospace Inc).
There are 4 known substitutes for 4820-00-857-8247: 6130-00-851-2767, 5935-01-246-7543, 7025-01-339-4414 and 1 more. Verify interchangeability with system specifications before substitution.
Key specifications for P6-300: Operating Pressure: 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS; Test Data Document: 36659-668455 DRAWING (THIS IS THE BASIC GOVERNING DRAWING, SUCH AS A CONTRACTOR DRAWING, ORIGINAL EQUIPMENT MANUFACTURER DRAWING, ETC.; EXCLUDES ANY SPECIFICATION, STANDARD OR OTHER DOCUMENT THAT MAY BE REFERENCED IN A BASIC GOVERNING DRAWING); Style Designator: STRAIGHT THRU; Media for Which Designed: HYDRAULIC FLUID, PHOSPHATE-ESTER BASE SINGLE RESPONSE. 20 total characteristics are documented in the Federal Logistics Information System.