The Seat,valve, cataloged under National Stock Number 4820-01-073-5849, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Naval Ship Systems Command. Government technical data includes 14 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 7 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 | 4820-01-073-5849 |
| Primary Part Number | SS845-1889587 ASSYC1-2INPC4 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Naval Ship Systems Command |
| Status | CANCELLED |
| Under Flange Height | 0.316 INCHES NOMINAL IN |
| Nominal Thread Size | 0.766 INCHES SINGLE THREADED PORTION IN |
| Thread Length | 0.222 INCHES NOMINAL SINGLE THREADED PORTION IN |
| Material | NICKEL ALLOY OVERALL |
| Thread Series Designator | UNS SINGLE THREADED PORTION |
| Material Document and Classification | QQ-N-281 CLASS A FED SPEC SINGLE MATERIAL RESPONSE OR QQ-N-281 CLASS B FED SPEC SINGLE MATERIAL RESPONSE OR QQ-N-288 COMP A FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Style Designator | THREADED FLANGED |
| Body Inside Diameter | 0.471 INCHES NOMINAL IN |
| Seating Surface Shape | ANGULAR |
| Thread Quantity Per Inch | 24 SINGLE THREADED PORTION |
| Flange Diameter | 0.937 INCHES NOMINAL IN |
| Seat Angle in Deg | 15.000 NOMINAL |
| Flange Seat to Disk End Height | 0.122 INCHES NOMINAL IN |
| Thread Class | 3A SINGLE THREADED PORTION A |
| Acquisition Status | CANCELLED |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| SS845-1889587 ASSYC1-2INPC4 PRIMARY | Naval Ship Systems Command (USA) |
| 8032177934-X3XX-18 PRIMARY | Naval Sea Systems Command (USA) |
| 2620-902 ASSYC1-2INPC4 PRIMARY | Electric Boat Corporation Div General Dynamics Electric Boat (USA) |
| 803-2177934-REV.C-3XX-18 | Naval Sea Systems Command (USA) |
| 803-2177934 | Naval Sea Systems Command (USA) |
| 2620-902 | Electric Boat Corporation Div General Dynamics Electric Boat (USA) |
| SS845-1889587 | Naval Ship Systems Command (USA) |
NSN 4820-01-073-5849 is a Seat,valve, manufactured by Naval Ship Systems Command, classified under FSC 4820 (No Item Name Available). Status: cancelled.
NSN 4820-01-073-5849 has 7 cross-referenced part numbers: SS845-1889587 ASSYC1-2INPC4 (Naval Ship Systems Command), 8032177934-X3XX-18 (Naval Sea Systems Command), 2620-902 ASSYC1-2INPC4 (Electric Boat Corporation Div General Dynamics Electric Boat), 803-2177934-REV.C-3XX-18 (Naval Sea Systems Command), 803-2177934 (Naval Sea Systems Command) and 2 more.
There are 12 known substitutes for 4820-01-073-5849: 4820-00-871-8935, 4820-01-043-3626, 4820-01-067-3653 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for SS845-1889587 ASSYC1-2INPC4: Under Flange Height: 0.316 INCHES NOMINAL IN; Nominal Thread Size: 0.766 INCHES SINGLE THREADED PORTION IN; Thread Length: 0.222 INCHES NOMINAL SINGLE THREADED PORTION IN; Material: NICKEL ALLOY OVERALL. 14 total characteristics are documented in the Federal Logistics Information System.
NSN 4820-01-073-5849 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.