803-1385637PC8 4IN

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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-067-9722

Item Name Code

22113

Assigment Date

11/11/1978 (47 years ago)

A cylindrical item with or without flange(s), designed to be inserted in a pump casing or secured to the impeller of a centrifugal pump. It is used for the purpose of providing a close running clearance between the impeller and casing in order to prevent or overcome leakage due to erosion. It may also be used as a diffuser ring in the suction and discharge throats of valves.

0.531 inches nominal single threaded portion thread length, 3.938 inches nominal body inside diameter, 4.812 inches nominal flange diameter, 3a single threaded portion thread class, 0.250 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.

Thread Class: 3a single threaded portion
Thread Length: 0.531 inches nominal single threaded portion
Flange Diameter: 4.812 inches nominal
Body Inside Diameter: 3.938 inches nominal
Flange Seat To Disk End Height: 0.250 inches nominal
Under Flange Height: 0.531 inches nominal
Thread Quantity Per Inch: 12 single threaded portion
Nominal Thread Size: 4.531 inches single threaded portion
Seating Surface Shape: flat
Special Features: for 4 in. valve
Material: nickel alloy overall
Material Document And Classification: qq-n-288 fed spec single material response overall
Style Designator: threaded flanged
Thread Series Designator: uns 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
803-1385637PC8 4IN	Valve Seat
803-B85637-03X-08	Valve Seat
810-1385637 PIE	Valve Seat
810-1385637PC8 4IN VALVE	Valve Seat

FAQs

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

What is the FSCG of the NSN 4820-01-067-9722?

The FSCG of the NSN 4820-01-067-9722 is 4820

Does the NSN 4820-01-067-9722 have a Schedule B code assigned?

Yes, the Schedule B code is 8481909090

Does NSN 4820-01-067-9722 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 4820-01-067-9722 contain precious materials?

Precious metal content is unknown

Does NSN 4820-01-067-9722 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 4820-01-067-9722 was assigned to the Federal Catalog?

It was assigned 47 years ago, on Sat, Nov 11, 1978