4820-01-256-4879

Find complete technical information, availability, and procurement data for: 4820-01-256-4879
DODParts.com distributes related products varnishes dopes paints, aircraft parts and consumables, electrical parts, fittings and other components for the aerospace and defense industries. Submit the short price quote form for NSN 4820-01-256-4879 to receive an up to date pricing and availability quote by email.

Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-256-4879

Item Name Code

22113

Assigment Date

06/05/1987 (39 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.

3.875 inches nominal body inside diameter, 0.875 inches nominal single threaded portion thread length, 4.375 inches nominal flange diameter, 0.312 inches nominal flange seat to disk end height, 3b single threaded portion thread class

Product Characteristics

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

Thread Class: 3b single threaded portion
Thread Length: 0.875 inches nominal single threaded portion
Flange Diameter: 4.375 inches nominal
Body Inside Diameter: 3.875 inches nominal
Flange Seat To Disk End Height: 0.312 inches nominal
Under Flange Height: 1.000 inches nominal
Thread Quantity Per Inch: 14 single threaded portion
Nominal Thread Size: 4.250 inches single threaded portion
Seating Surface Shape: flat
Material: copper alloy body
Style Designator: threaded flanged
Thread Series Designator: un single threaded portion

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
801-01	Valve Seat

FAQs

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

What is the FSCG of the NSN 4820-01-256-4879?

The FSCG of the NSN 4820-01-256-4879 is 4820

Does the NSN 4820-01-256-4879 have a Schedule B code assigned?

Yes, the Schedule B code is 8481909090

Does NSN 4820-01-256-4879 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 4820-01-256-4879 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-256-4879 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 4820-01-256-4879 was assigned to the Federal Catalog?

It was assigned 39 years ago, on Fri, Jun 5, 1987