The Disk,valve, cataloged under National Stock Number 4820-00-036-1858, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Ashcroft Inc Dba Heise. Government technical data includes 10 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-036-1858 |
| Primary Part Number | 16439 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Ashcroft Inc Dba Heise |
| Status | ACTIVE |
| Thread Class | 2B |
| Thread Series Designator | UN |
| Style Designator | PLUG |
| Nominal Thread Size | 2.250 INCHES IN |
| Shoulder Height | 0.250 INCHES NOMINAL IN |
| Outside Diameter | 2.735 INCHES NOMINAL IN |
| Seat Angle | 30.0 DEGREES NOMINAL |
| Thread Quantity Per Inch | 16 |
| Shoulder Width | 0.675 INCHES NOMINAL IN |
| Material | STEEL |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
NSN 4820-00-036-1858 is a Disk,valve, manufactured by Ashcroft Inc Dba Heise, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-00-036-1858 has 2 cross-referenced part numbers: 16439 (Ashcroft Inc Dba Heise), 16439 (Dresser, Inc. Dba Dresser Equipment Group Div Industrial Valve Operations, Dresse).
There are 3 known substitutes for 4820-00-036-1858: 3120-00-836-9401, 9540-01-057-3872, 6515-01-591-4854. Verify interchangeability with system specifications before substitution.
Key specifications for 16439: Thread Class: 2B; Thread Series Designator: UN; Style Designator: PLUG; Nominal Thread Size: 2.250 INCHES IN. 12 total characteristics are documented in the Federal Logistics Information System.