The Seat,valve, cataloged under National Stock Number 4820-00-036-1991, 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 9 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-036-1991 |
| Primary Part Number | 85510 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Ashcroft Inc Dba Heise |
| Status | ACTIVE |
| Thread Series Designator | UNS SINGLE THREADED PORTION |
| Material | STEEL CORROSION RESISTING OVERALL |
| Nominal Thread Size | 1.875 INCHES SINGLE THREADED PORTION IN |
| Thread Quantity Per Inch | 18 SINGLE THREADED PORTION |
| Thread Length | 0.438 INCHES NOMINAL SINGLE THREADED PORTION IN |
| Seating Surface Shape | FLAT |
| Body Inside Diameter | 1.312 INCHES NOMINAL IN |
| Style Designator | PLAIN THREADED |
| Thread Class | 2A SINGLE THREADED PORTION A |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 85510 PRIMARY | Ashcroft Inc Dba Heise (USA) |
NSN 4820-00-036-1991 is a Seat,valve, manufactured by Ashcroft Inc Dba Heise, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-00-036-1991 has 1 cross-referenced part number: 85510 (Ashcroft Inc Dba Heise).
There are 2 known substitutes for 4820-00-036-1991: 4730-00-476-5441, 1355-01-048-4837. Verify interchangeability with system specifications before substitution.
Key specifications for 85510: Thread Series Designator: UNS SINGLE THREADED PORTION; Material: STEEL CORROSION RESISTING OVERALL; Overall Height: 0.562 INCHES NOMINAL IN; Nominal Thread Size: 1.875 INCHES SINGLE THREADED PORTION IN. 10 total characteristics are documented in the Federal Logistics Information System.