25823N PIECE 21

View detailed technical data, stock status, and sourcing information for: 25823N PIECE 21
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-122-3990

Item Name Code

22113

Assigment Date

11/20/1981 (44 years ago)

4.875 inches nominal flange diameter, 0.740 inches nominal under flange height, 3.875 inches nominal body inside diameter, 0.340 inches nominal flange seat to disk end height, flat seating surface shape

Product Characteristics

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

Flange Diameter: 4.875 inches nominal
Body Inside Diameter: 3.875 inches nominal
Flange Seat To Disk End Height: 0.340 inches nominal
Under Flange Height: 0.740 inches nominal
Seating Surface Shape: flat
Material: steel corrosion resisting overall
Style Designator: threaded flanged

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
25823N PIECE 21	Valve Seat
26646-00-58	Valve Seat

FAQs

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

What is the FSCG of the NSN 4820-01-122-3990?

The FSCG of the NSN 4820-01-122-3990 is 4820

Does the NSN 4820-01-122-3990 have a Schedule B code assigned?

Yes, the Schedule B code is 8481909090

Does NSN 4820-01-122-3990 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 4820-01-122-3990 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-122-3990 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 4820-01-122-3990 was assigned to the Federal Catalog?

It was assigned 44 years ago, on Fri, Nov 20, 1981