The Seat,valve, cataloged under National Stock Number 4820-01-020-3395, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier. Government technical data includes 13 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. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-020-3395 |
| Primary Part Number | 737204 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| Status | ACTIVE |
| Seating Surface Shape | ANGULAR |
| Material Document and Classification | QQ-C-390,TYPE 1,ALLOY X6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Material | COPPER ALLOY OVERALL |
| Thread Series Designator | UNF SINGLE THREADED PORTION |
| Style Designator | THREADED FLANGED |
| Nominal Thread Size | 0.562 INCHES SINGLE THREADED PORTION IN |
| Under Flange Height | 0.562 INCHES NOMINAL IN |
| Body Stepped Inside Diameter | 0.281 INCHES NOMINAL SECOND STEP IN |
| Body Stepped Inside Diameter | 0.125 INCHES NOMINAL FIRST STEP IN |
| Flange Seat to Disk End Height | 0.344 INCHES NOMINAL IN |
| Thread Class | 3A SINGLE THREADED PORTION A |
| Thread Length | 0.281 INCHES NOMINAL SINGLE THREADED PORTION IN |
| Criticality Code Justification | FEAT |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 737204 PRIMARY | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
NSN 4820-01-020-3395 is a Seat,valve, manufactured by Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-01-020-3395 has 1 cross-referenced part number: 737204 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).
There is 1 known substitute for 4820-01-020-3395: 5365-01-524-1896. Verify interchangeability with system specifications before substitution.
Key specifications for 737204: Seating Surface Shape: ANGULAR; Material Document and Classification: QQ-C-390,TYPE 1,ALLOY X6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Material: COPPER ALLOY OVERALL; Thread Series Designator: UNF SINGLE THREADED PORTION. 14 total characteristics are documented in the Federal Logistics Information System.