4820-01-139-1685

Find complete technical information, availability, and procurement data for: 4820-01-139-1685
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-139-1685

Item Name Code

22113

Assigment Date

09/25/1982 (43 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.

1.375 inches nominal body inside diameter, 1.750 inches nominal body outside diameter, angular seating surface shape, 0.187 inches nominal overall height, 20.000 nominal seat angle in deg

Product Characteristics

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

Overall Height: 0.187 inches nominal
Body Outside Diameter: 1.750 inches nominal
Body Inside Diameter: 1.375 inches nominal
Seat Angle In Deg: 20.000 nominal
Seating Surface Shape: angular
Special Features: all outside corners chamfer 0.031 in. by 45 deg
Material: steel seat
Style Designator: plain

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
4820-01-166-8703	No Name Available	06/01/1988
4820-01-252-3794	No Name Available	07/01/1988

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
807-1600	Valve Seat
807-1600 PIECE 24 1 1-4IN	Valve Seat
807-1800 PART 24 1 1-2IN	Valve Seat
807-1800-24 1 1	Valve Seat
807-1800-24 1 1-2IN	Valve Seat
807-1800-24-1 1/2 IN.	Valve Seat
807-1800-24:1-1/2 AND 1-1/4	Valve Seat
807-2000-24	Valve Seat

FAQs

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

What is the FSCG of the NSN 4820-01-139-1685?

The FSCG of the NSN 4820-01-139-1685 is 4820

Does the NSN 4820-01-139-1685 have a Schedule B code assigned?

Yes, the Schedule B code is 8481909090

Does NSN 4820-01-139-1685 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 4820-01-139-1685 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-139-1685 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 4820-01-139-1685 was assigned to the Federal Catalog?

It was assigned 43 years ago, on Sat, Sep 25, 1982