4820-01-029-2781

Find complete technical information, availability, and procurement data for: 4820-01-029-2781
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-029-2781

Item Name Code

22113

Assigment Date

10/16/1976 (49 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.

1.620 inches nominal flange seat to disk end height, 3.880 inches nominal body outside diameter, 0.180 inches nominal seat radius, 2.365 inches minimum and 2.375 inches maximum body inside diameter, 4.750 inches minimum and 4.751 inches maximum flange 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: 4.750 inches minimum and 4.751 inches maximum
Body Outside Diameter: 3.880 inches nominal
Body Inside Diameter: 2.365 inches minimum and 2.375 inches maximum
Seat Radius: 0.180 inches nominal
Flange Seat To Disk End Height: 1.620 inches nominal
Under Flange Height: 3.940 inches nominal
Seating Surface Shape: radial
Material: steel overall
Material Document And Classification: qq-s-763,class 410 fed 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
4008G83 PIECE 2	Valve Seat
4008G83-002	Valve Seat
4008G83-2	Valve Seat
6016038-002	Valve Seat
6016038P002	Valve Seat
781E733P39	Valve Seat
W6016038-002	Valve Seat

FAQs

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

What is the FSCG of the NSN 4820-01-029-2781?

The FSCG of the NSN 4820-01-029-2781 is 4820

Does the NSN 4820-01-029-2781 have a Schedule B code assigned?

Yes, the Schedule B code is 8481909090

Does NSN 4820-01-029-2781 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 4820-01-029-2781 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-029-2781 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 4820-01-029-2781 was assigned to the Federal Catalog?

It was assigned 49 years ago, on Sat, Oct 16, 1976