AA19821-4PC19821-55

View detailed technical data, stock status, and sourcing information for: AA19821-4PC19821-55
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-00-306-1257

Item Name Code

60396

Assigment Date

01/01/1961 (65 years ago)

flat style designator, 0.025 inches nominal material thickness, 3.750 inches nominal outside diameter, steel corrosion resisting material, 0.775 inches nominal center hole diameter

Product Characteristics

Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.

Outside Diameter: 3.750 inches nominal
Material Thickness: 0.025 inches nominal
Center Hole Diameter: 0.775 inches nominal
Material: steel corrosion resisting
Style Designator: flat

Related Parts

This NSN group includes multiple components designed to meet specific performance and operational standards. Each listing provides detailed specs, functionality data, and replacement compatibility information:

Part Number	Name
AA19821-11PC19821-54	Flat Valve Diaphragm
AA19821-11PC19821-55	Flat Valve Diaphragm
AA19821-4PC19821-54	Flat Valve Diaphragm
AA19821-4PC19821-55	Flat Valve Diaphragm
AA19821-6PC19821-54	Flat Valve Diaphragm
AA19821-6PC19821-55	Flat Valve Diaphragm
AA19821-7PC19821-54	Flat Valve Diaphragm
AA19821-7PC19821-55	Flat Valve Diaphragm
AA19821-9PC19821-54	Flat Valve Diaphragm
AA19821-9PC19821-55	Flat Valve Diaphragm
AA21041-5PC19821-54	Flat Valve Diaphragm
AA21041-5PC19821-55	Flat Valve Diaphragm
AA21043-1PC19821-54	Flat Valve Diaphragm
AA21043-1PC19821-55	Flat Valve Diaphragm
AA21043PC19821-54	Flat Valve Diaphragm
AA21043PC19821-55	Flat Valve Diaphragm
AA21256PC19821-54	Flat Valve Diaphragm
AA21256PC19821-55	Flat Valve Diaphragm
AA21294PC19821-54	Flat Valve Diaphragm
AA21294PC19821-55	Flat Valve Diaphragm
AA22781PC22782-54	Flat Valve Diaphragm
AA22781PC22782-55	Flat Valve Diaphragm
AA22782PC22782-54	Flat Valve Diaphragm
AA22782PC22782-55	Flat Valve Diaphragm
D25981QC	Flat Valve Diaphragm

FAQs

Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.

What is the FSCG of the NSN 4820-00-306-1257?

The FSCG of the NSN 4820-00-306-1257 is 4820

Does the NSN 4820-00-306-1257 have a Schedule B code assigned?

Yes, the Schedule B code is 8481909090

Does NSN 4820-00-306-1257 require demilitarization?

Items subject to the export administration regulations (ear) in parts 730-774 of title 15, code of federal regulations (cfr) (ccli or ear99) and determined by dod to present a low risk when released out of dod control. No demil, mut, or end use certificate is required. May require an export licensefrom doc.

Does NSN 4820-00-306-1257 contain precious materials?

Precious metal content is unknown

Does NSN 4820-00-306-1257 contain hazardous materials?

Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.

When the NSN 4820-00-306-1257 was assigned to the Federal Catalog?

It was assigned 65 years ago, on Sun, Jan 1, 1961