4820-00-103-8278

Find complete technical information, availability, and procurement data for: 4820-00-103-8278
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-00-103-8278

Item Name Code

22113

Assigment Date

06/14/1968 (58 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.

3.768 inches nominal flange diameter, 1.782 inches nominal overall height, 0.125 inches nominal seat radius, 3.768 inches nominal body outside diameter, 2.563 inches nominal body inside diameter

Product Characteristics

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

Flange Diameter: 3.768 inches nominal
Overall Height: 1.782 inches nominal
Body Outside Diameter: 3.768 inches nominal
Body Inside Diameter: 2.563 inches nominal
Seat Radius: 0.125 inches nominal
Flange Seat To Disk End Height: 0.500 inches nominal
Under Flange Height: 1.438 inches nominal
Seal Accommodation Type: recessed
Seating Surface Shape: radial
Special Features: two holes,0.438 in.id located on outer periphery of body,180 deg apart
Material: rubber buna n overall
Style Designator: plain flanged

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
4820-00-073-2252	No Name Available	11/01/1976
4820-00-890-1881	No Name Available	01/01/1989
4820-00-915-3652	No Name Available	07/01/1990

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
10-107-2PC4	Valve Seat
206-206-025-100-000	Valve Seat
230-206-025-100-000	Valve Seat

FAQs

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

What is the FSCG of the NSN 4820-00-103-8278?

The FSCG of the NSN 4820-00-103-8278 is 4820

Does the NSN 4820-00-103-8278 have a Schedule B code assigned?

Yes, the Schedule B code is 8481909090

Does NSN 4820-00-103-8278 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 4820-00-103-8278 contain precious materials?

Precious metal content is unknown

Does NSN 4820-00-103-8278 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 4820-00-103-8278 was assigned to the Federal Catalog?

It was assigned 58 years ago, on Fri, Jun 14, 1968