The Valve,check, cataloged under National Stock Number 4820-00-603-8696, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Mission Systems Orchard Park Inc. Government technical data includes 23 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 3 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 | 4820-00-603-8696 |
| Primary Part Number | 21020 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Mission Systems Orchard Park Inc |
| Status | CANCELLED |
| Style Designator | STRAIGHT THRU |
| Connection Type | THREADED EXTERNAL TUBE FIRST END |
| Thread Quantity Per Inch | 20 FIRST END |
| Mounting Position | HORIZONTAL |
| Thread Class | 3A FIRST END A |
| Nominal Pipe Size Accommodated | 0.125 INCHES SECOND END IN |
| Connection Type | THREADED EXTERNAL PIPE SECOND END |
| Disk Loading Method | SPRING |
| Nominal Thread Size | 0.500 INCHES FIRST END IN |
| Surface Treatment Document and Classification | MIL-A-8625,TY 1 MIL SPEC SINGLE TREATMENT RESPONSE |
| Connection Style | PLAIN (PIPE) SECOND END |
| Material | ALUMINUM ALLOY BODY |
| Seat Angle | 37.0 DEGREES FIRST END |
| Material | ALUMINUM ALLOY SEAT |
| Thread Series Designator | NPT SECOND END |
| Nominal Thread Size | 0.125 INCHES SECOND END IN |
| Flow Control Device | POPPET |
| Surface Treatment | ANODIZE |
| Nominal Outside Diameter Tube Accommodated | 0.312 INCHES FIRST END IN |
| Thread Quantity Per Inch | 27 SECOND END |
| Thread Direction | RIGHT-HAND SECOND END |
| Thread Series Designator | UNF FIRST END |
| Thread Direction | RIGHT-HAND FIRST END |
| Acquisition Status | CANCELLED |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 900100 | Ingersoll-Rand Company Dba Ingersoll-Rand (USA) |
| 21020 | Ingersoll-Rand Company Dba Ingersoll-Rand (USA) |
| 8148650 | Air Force United States Department of the Dba Tinker Afb Oc Alc Dsp Div Department of the Air Force (USA) |
| 21020 PRIMARY | Mission Systems Orchard Park Inc (USA) |
NSN 4820-00-603-8696 is a Valve,check, manufactured by Mission Systems Orchard Park Inc, classified under FSC 4820 (No Item Name Available). Status: cancelled.
NSN 4820-00-603-8696 has 4 cross-referenced part numbers: 900100 (Ingersoll-Rand Company Dba Ingersoll-Rand), 21020 (Ingersoll-Rand Company Dba Ingersoll-Rand), 8148650 (Air Force United States Department of the Dba Tinker Afb Oc Alc Dsp Div Department of the Air Force), 21020 (Mission Systems Orchard Park Inc).
There are 12 known substitutes for 4820-00-603-8696: 5120-00-061-8544, 4730-00-278-2523, 5915-00-449-9791 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for 21020: Style Designator: STRAIGHT THRU; Connection Type: THREADED EXTERNAL TUBE FIRST END; Thread Quantity Per Inch: 20 FIRST END; Mounting Position: HORIZONTAL. 23 total characteristics are documented in the Federal Logistics Information System.
NSN 4820-00-603-8696 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.