The Seat,valve, cataloged under National Stock Number 4820-00-303-6450, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Valcor Engineering Corporation. Government technical data includes 8 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. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-303-6450 |
| Primary Part Number | 203355 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Valcor Engineering Corporation |
| Status | ACTIVE |
| Under Flange Height | 0.187 INCHES NOMINAL IN |
| Flange Seat to Disk End Height | 0.125 INCHES NOMINAL IN |
| Seating Surface Shape | FLAT |
| Material Document and Classification | MIL-P-17091,TYPE F-10001 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Style Designator | PLAIN FLANGED |
| Material | PLASTIC OVERALL |
| Flange Diameter | 0.500 INCHES NOMINAL IN |
| Body Inside Diameter | 0.250 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
NSN 4820-00-303-6450 is a Seat,valve, manufactured by Valcor Engineering Corporation, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-00-303-6450 has 2 cross-referenced part numbers: 203355 (Valcor Engineering Corporation), 203355 (Kidde-Fenwal, Llc).
There are 4 known substitutes for 4820-00-303-6450: 2520-00-164-4067, 4920-00-801-8729, 5340-01-212-8311 and 1 more. Verify interchangeability with system specifications before substitution.
Key specifications for 203355: Under Flange Height: 0.187 INCHES NOMINAL IN; Flange Seat to Disk End Height: 0.125 INCHES NOMINAL IN; Seating Surface Shape: FLAT; Material Document and Classification: MIL-P-17091,TYPE F-10001 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL. 8 total characteristics are documented in the Federal Logistics Information System.