The Diaphragm,valve,flat, cataloged under National Stock Number 4820-00-021-1728, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Flexitallic Us, Llc. Government technical data includes 8 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 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 | 4820-00-021-1728 |
| Primary Part Number | A4358 |
| Item Name | Diaphragm,valve,flat |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Flexitallic Us, Llc |
| Status | ACTIVE |
| Bolt Hole Quantity | 24 |
| Center Hole Diameter | 0.438 INCHES NOMINAL IN |
| Style Designator | FLAT |
| Material Thickness | 0.130 INCHES NOMINAL IN |
| Material | RUBBER SYNTHETIC |
| Hole Diameter | 0.312 INCHES NOMINAL IN |
| Bolt Circle Diameter | 17.625 INCHES NOMINAL IN |
| Outside Diameter | 18.250 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
NSN 4820-00-021-1728 is a Diaphragm,valve,flat, manufactured by Flexitallic Us, Llc, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-00-021-1728 has 3 cross-referenced part numbers: A4358 (Flexitallic Gasket Co Inc), A4358 (Flexitallic Us, Llc), A4358 (Singer Valve Inc).
There are 4 known substitutes for 4820-00-021-1728: 5306-00-144-3864, 5962-01-032-9896, 5342-01-145-3969 and 1 more. Verify interchangeability with system specifications before substitution.
Key specifications for A4358: Bolt Hole Quantity: 24; Center Hole Diameter: 0.438 INCHES NOMINAL IN; Style Designator: FLAT; Material Thickness: 0.130 INCHES NOMINAL IN. 8 total characteristics are documented in the Federal Logistics Information System.