The Seat,valve, cataloged under National Stock Number 4820-00-075-2255, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Eaton Aerospace Llc Dba Eaton Aerospace Jackson. Government technical data includes 11 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 | 4820-00-075-2255 |
| Primary Part Number | 14521 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Eaton Aerospace Llc Dba Eaton Aerospace Jackson |
| Status | ACTIVE |
| Body Outside Diameter | 0.262 INCHES MINIMUM AND 0.264 INCHES MAXIMUM IN |
| Flange Seat to Disk End Height | 0.200 INCHES MINIMUM AND 0.202 INCHES MAXIMUM IN |
| Body Stepped Inside Diameter | 0.125 INCHES NOMINAL FIRST STEP IN |
| Seating Surface Shape | FLAT |
| Material | STEEL OVERALL |
| Style Designator | PLAIN FLANGED |
| Body Stepped Inside Diameter | 0.094 INCHES MINIMUM AND 0.095 INCHES MAXIMUM SECOND STEP IN |
| Hardness Rating | 25.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL |
| Under Flange Height | 0.138 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN |
| Material Document and Classification | QQ-S-763 CL 416 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Flange Diameter | 0.371 INCHES MINIMUM AND 0.373 INCHES MAXIMUM IN |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 14521 PRIMARY | Eaton Aerospace Llc Dba Eaton Aerospace Jackson (USA) |
NSN 4820-00-075-2255 is a Seat,valve, manufactured by Eaton Aerospace Llc Dba Eaton Aerospace Jackson, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-00-075-2255 has 1 cross-referenced part number: 14521 (Eaton Aerospace Llc Dba Eaton Aerospace Jackson).
There are 2 known substitutes for 4820-00-075-2255: 3110-00-144-8931, 5220-01-706-8796. Verify interchangeability with system specifications before substitution.
Key specifications for 14521: Body Outside Diameter: 0.262 INCHES MINIMUM AND 0.264 INCHES MAXIMUM IN; Flange Seat to Disk End Height: 0.200 INCHES MINIMUM AND 0.202 INCHES MAXIMUM IN; Body Stepped Inside Diameter: 0.125 INCHES NOMINAL FIRST STEP IN; Seating Surface Shape: FLAT. 11 total characteristics are documented in the Federal Logistics Information System.