The Seat,valve, cataloged under National Stock Number 4820-00-393-4345, 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 12 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. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-393-4345 |
| Primary Part Number | 18344 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Ashcroft Inc Dba Heise |
| Status | ACTIVE |
| Seating Surface Shape | FLAT |
| Style Designator | THREADED FLANGED |
| Material | STEEL OVERALL |
| Flange Diameter | 2.000 INCHES NOMINAL IN |
| Under Flange Height | 0.625 INCHES NOMINAL IN |
| Thread Class | 2A SINGLE THREADED PORTION A |
| Thread Length | 0.500 INCHES NOMINAL SINGLE THREADED PORTION IN |
| Seal Accommodation Type | GROOVED |
| Thread Series Designator | UNEF SINGLE THREADED PORTION |
| Body Inside Diameter | 0.469 INCHES NOMINAL IN |
| Flange Seat to Disk End Height | 1.125 INCHES NOMINAL IN |
| Nominal Thread Size | 1.500 INCHES SINGLE THREADED PORTION IN |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
NSN 4820-00-393-4345 is a Seat,valve, manufactured by Ashcroft Inc Dba Heise, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-00-393-4345 has 2 cross-referenced part numbers: 18344 (Ashcroft Inc Dba Heise), 18344 (Dresser, Inc. Dba Dresser Equipment Group Div Industrial Valve Operations, Dresse).
There are 6 known substitutes for 4820-00-393-4345: 1680-00-474-1237, 6145-00-729-9051, 5950-00-809-1239 and 3 more. Verify interchangeability with system specifications before substitution.
Key specifications for 18344: Seating Surface Shape: FLAT; Style Designator: THREADED FLANGED; Material: STEEL OVERALL; Flange Diameter: 2.000 INCHES NOMINAL IN. 12 total characteristics are documented in the Federal Logistics Information System.