The Seat,valve, cataloged under National Stock Number 4820-00-486-3400, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Ontic Engineering & Manufacturing, Inc Dba Ontic Us. Government technical data includes 11 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, 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 | 4820-00-486-3400 |
| Primary Part Number | 525-25 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Ontic Engineering & Manufacturing, Inc Dba Ontic Us |
| Status | ACTIVE |
| Body Inside Diameter | 0.312 INCHES MINIMUM AND 0.313 INCHES MAXIMUM IN |
| FSC Application Data | ACFT PROPELLER FEATHERING PUMP |
| Material | STEEL OVERALL |
| Surface Treatment | CADMIUM OVERALL |
| Hardness Rating | 45.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM BODY |
| Material Document and Classification | SAE 52100 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Seating Surface Shape | FLAT |
| Body Outside Diameter | 0.570 INCHES MINIMUM AND 0.572 INCHES MAXIMUM IN |
| Flange Seat to Disk End Height | 0.250 INCHES NOMINAL IN |
| Seal Accommodation Type | GROOVED |
| Under Flange Height | 0.969 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
NSN 4820-00-486-3400 is a Seat,valve, manufactured by Ontic Engineering & Manufacturing, Inc Dba Ontic Us, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-00-486-3400 has 2 cross-referenced part numbers: 525-25 (Donallco Inc), 525-25 (Ontic Engineering & Manufacturing, Inc Dba Ontic Us).
There are 3 known substitutes for 4820-00-486-3400: 4730-00-020-2647, 3455-00-140-3043, 6680-01-111-8698. Verify interchangeability with system specifications before substitution.
Key specifications for 525-25: Body Inside Diameter: 0.312 INCHES MINIMUM AND 0.313 INCHES MAXIMUM IN; FSC Application Data: ACFT PROPELLER FEATHERING PUMP; Material: STEEL OVERALL; Surface Treatment: CADMIUM OVERALL. 11 total characteristics are documented in the Federal Logistics Information System.