4820-01-020-9879

Find complete technical information, availability, and procurement data for: 4820-01-020-9879
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-020-9879

Item Name Code

22113

Assigment Date

05/07/1976 (50 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.

0.438 inches nominal under flange height, 2.046 inches minimum and 2.062 inches maximum body outside diameter, 2.6260 inches minimum and 2.6265 inches maximum flange diameter, 0.225 inches nominal seat radius, 1.437 inches nominal flange seat to disk end height

Product Characteristics

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

Flange Diameter: 2.6260 inches minimum and 2.6265 inches maximum
Body Outside Diameter: 2.046 inches minimum and 2.062 inches maximum
Seat Radius: 0.225 inches nominal
Flange Seat To Disk End Height: 1.437 inches nominal
Under Flange Height: 0.438 inches nominal
Seating Surface Shape: radial
Body Stepped Inside Diameter: 0.750 inches nominal first step
Body Stepped Inside Diameter: 0.968 inches nominal second step
Material: nickel alloy overall
Material Document And Classification: mil-n-6710,cond e,finish 4 mil spec single material response overall
Style Designator: plain 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
134B509FX	Valve Seat
B708E02A	Valve Seat
B70BE02A	Valve Seat

FAQs

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

What is the FSCG of the NSN 4820-01-020-9879?

The FSCG of the NSN 4820-01-020-9879 is 4820

Does the NSN 4820-01-020-9879 have a Schedule B code assigned?

Yes, the Schedule B code is 8481909090

Does NSN 4820-01-020-9879 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 4820-01-020-9879 contain precious materials?

Precious metal content is unknown

Does NSN 4820-01-020-9879 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 4820-01-020-9879 was assigned to the Federal Catalog?

It was assigned 50 years ago, on Fri, May 7, 1976