4820-01-204-8418

Find complete technical information, availability, and procurement data for: 4820-01-204-8418
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-204-8418

Item Name Code

22113

Assigment Date

03/30/1985 (41 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.

3.187 inches nominal flange diameter, 45.000 nominal seat angle in deg, 0.531 inches nominal under flange height, 2.500 inches nominal body inside diameter, 0.187 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: 3.187 inches nominal
Body Inside Diameter: 2.500 inches nominal
Flange Seat To Disk End Height: 0.187 inches nominal
Under Flange Height: 0.531 inches nominal
Seat Angle In Deg: 45.000 nominal
Seating Surface Shape: angular
Material: nickel alloy seat
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
1889553 PIECE 31	Valve Seat
2620-922X2 ASSEMBLY GS PIECE 31	Valve Seat
7874-94	Valve Seat

FAQs

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

What is the FSCG of the NSN 4820-01-204-8418?

The FSCG of the NSN 4820-01-204-8418 is 4820

Does the NSN 4820-01-204-8418 have a Schedule B code assigned?

Yes, the Schedule B code is 8481909090

Does NSN 4820-01-204-8418 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 4820-01-204-8418 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-204-8418 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 4820-01-204-8418 was assigned to the Federal Catalog?

It was assigned 41 years ago, on Sat, Mar 30, 1985