The Seat,valve, cataloged under National Stock Number 4820-01-251-3123, 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 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. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-251-3123 |
| Primary Part Number | CV9-S4501-026-20 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Naval Ship Systems Command |
| Status | ACTIVE |
| Material | COPPER ALLOY SEAT |
| Thread Series Designator | UNS SINGLE THREADED PORTION |
| Style Designator | PLAIN THREADED |
| Body Inside Diameter | 1.248 INCHES NOMINAL IN |
| Thread Quantity Per Inch | 18 SINGLE THREADED PORTION |
| Nominal Thread Size | 1.747 INCHES SINGLE THREADED PORTION IN |
| Seating Surface Shape | FLAT |
| Thread Length | 1.060 INCHES NOMINAL SINGLE THREADED PORTION IN |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| CV9-S4501-026-20 PRIMARY | Naval Ship Systems Command (USA) |
| CV9-S4501-026 | Naval Ship Systems Command (USA) |
NSN 4820-01-251-3123 is a Seat,valve, manufactured by Naval Ship Systems Command, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-01-251-3123 has 2 cross-referenced part numbers: CV9-S4501-026-20 (Naval Ship Systems Command), CV9-S4501-026 (Naval Ship Systems Command).
There are 3 known substitutes for 4820-01-251-3123: 4820-01-251-5290, 4820-01-251-5322, 4820-01-262-8427. Verify interchangeability with system specifications before substitution.
Key specifications for CV9-S4501-026-20: Material: COPPER ALLOY SEAT; Thread Series Designator: UNS SINGLE THREADED PORTION; Style Designator: PLAIN THREADED; Body Inside Diameter: 1.248 INCHES NOMINAL IN. 9 total characteristics are documented in the Federal Logistics Information System.