The Valve,vent, cataloged under National Stock Number 4820-01-642-1569, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Armstrong International Inc Dba Armstrong Machine Works. Government technical data includes 8 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-642-1569 |
| Primary Part Number | D501062 |
| Item Name | Valve,vent |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Armstrong International Inc Dba Armstrong Machine Works |
| Status | ACTIVE |
| Style Designator | STRAIGHT THRU |
| Nominal Pipe Size Accommodated | 0.500 INCHES FIRST END IN |
| Connection Type | THREADED INTERNAL PIPE ALL ENDS |
| Nominal Pipe Size Accommodated | 0.750 INCHES SECOND END IN |
| Material | STEEL COMP 304L BODY |
| Thread Series Designator | NPT ALL ENDS |
| Material | STEEL SEAT |
| Operating Pressure | 500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
NSN 4820-01-642-1569 is a Valve,vent, manufactured by Armstrong International Inc Dba Armstrong Machine Works, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-01-642-1569 has 2 cross-referenced part numbers: 11-AV (Armstrong International Inc Dba Armstrong Machine Works), D501062 (Armstrong International Inc Dba Armstrong Machine Works).
There is 1 known substitute for 4820-01-642-1569: 4820-01-232-2487. Verify interchangeability with system specifications before substitution.
Key specifications for D501062: Style Designator: STRAIGHT THRU; Nominal Pipe Size Accommodated: 0.500 INCHES FIRST END IN; Connection Type: THREADED INTERNAL PIPE ALL ENDS; Nominal Pipe Size Accommodated: 0.750 INCHES SECOND END IN. 8 total characteristics are documented in the Federal Logistics Information System.