4820-00-128-0783

Find complete technical information, availability, and procurement data for: 4820-00-128-0783
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-00-128-0783

Item Name Code

22113

Assigment Date

11/29/1968 (57 years ago)

A replaceable item designed to provide a stationary seating surface for a mating, moveable item such as a valve disk or the like. The body may have a flange of various shapes. For diesel and gasoline reciprocating engines, see insert, engine valve seat.

0.375 inches minimum and 0.376 inches maximum body inside diameter, 0.406 inches nominal single threaded portion thread length, 0.219 inches nominal flange seat to disk end height, 1.000 inches nominal flange diameter, 2a single threaded portion thread class

Product Characteristics

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

Thread Class: 2a single threaded portion
Thread Length: 0.406 inches nominal single threaded portion
Flange Diameter: 1.000 inches nominal
Body Inside Diameter: 0.375 inches minimum and 0.376 inches maximum
Flange Seat To Disk End Height: 0.219 inches nominal
Under Flange Height: 0.406 inches nominal
Seat Angle In Deg: 45.000 nominal
Hardness Rating: 42.0 rockwell c minimum and 44.0 rockwell c maximum
Nominal Thread Size: 0.750 inches single threaded portion
Seating Surface Shape: angular
Material: steel corrosion resisting overall
Surface Treatment: passivate overall
Style Designator: threaded flanged
Thread Series Designator: unef single threaded portion

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
46316091-01	Valve Seat

FAQs

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

What is the FSCG of the NSN 4820-00-128-0783?

The FSCG of the NSN 4820-00-128-0783 is 4820

Does the NSN 4820-00-128-0783 have a Schedule B code assigned?

Yes, the Schedule B code is 8481909090

Does NSN 4820-00-128-0783 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 4820-00-128-0783 contain precious materials?

Precious metal content is unknown

Does NSN 4820-00-128-0783 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 4820-00-128-0783 was assigned to the Federal Catalog?

It was assigned 57 years ago, on Fri, Nov 29, 1968