4820-00-050-8181

Find complete technical information, availability, and procurement data for: 4820-00-050-8181
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-00-050-8181

Item Name Code

22113

Assigment Date

01/01/1963 (63 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.

0.459 inches nominal single threaded portion thread length, 0.268 inches nominal body inside diameter, 0.188 inches nominal seat radius, 3a single threaded portion thread class, 1.255 inches nominal flange diameter

Product Characteristics

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

Thread Class: 3a single threaded portion
Thread Length: 0.459 inches nominal single threaded portion
Flange Diameter: 1.255 inches nominal
Body Inside Diameter: 0.268 inches nominal
Seat Radius: 0.188 inches nominal
Flange Seat To Disk End Height: 0.128 inches nominal
Under Flange Height: 0.719 inches nominal
Nominal Thread Size: 0.562 inches single threaded portion
Seating Surface Shape: radial
Material: copper alloy overall
Style Designator: threaded flanged
Thread Series Designator: unf single threaded portion

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
4820-00-344-0768	No Name Available	08/01/1976
4310-00-876-4440	No Name Available	12/01/1975

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
526487	Valve Seat
562307	Valve Seat
9007309	Valve Seat
900V7309	Valve Seat
P55484	Valve Seat

FAQs

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

What is the FSCG of the NSN 4820-00-050-8181?

The FSCG of the NSN 4820-00-050-8181 is 4820

Does the NSN 4820-00-050-8181 have a Schedule B code assigned?

Yes, the Schedule B code is 8481909090

Does NSN 4820-00-050-8181 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 4820-00-050-8181 contain precious materials?

Precious metal content is unknown

Does NSN 4820-00-050-8181 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 4820-00-050-8181 was assigned to the Federal Catalog?

It was assigned 63 years ago, on Tue, Jan 1, 1963