4820-01-052-9688

Find complete technical information, availability, and procurement data for: 4820-01-052-9688
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-052-9688

Item Name Code

20520

Assigment Date

12/22/1977 (48 years ago)

A multi-ported, nonlubricated valve designed to provide straight through flow or ability to direct a number of flows or pressure through a single valve. The flow is controlled by the rotation of a ported ball within a suitable ported seat(s). The ball is usually engaged by a stem. It is normally operated in an open or closed position. Excludes:valve, check.

3a 2nd end thread class, 0.016 inches nominal aperture diameter, right-hand 2nd end thread direction, right-hand 1st end thread direction, 3a 1st end 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: 3a 1st end
Thread Class: 3a 2nd end
Thread Direction: right-hand 1st end
Thread Direction: right-hand 2nd end
Aperture Diameter: 0.016 inches nominal
Flow Control Device: disk
Disk Loading Method: spring
Renewable Seat Ring Type: threaded
Connection Style: flared (tube) 1st end
Valve Operation Method: automatic
Connection Type: threaded external tube 2nd end
Connection Type: threaded external tube 1st end
Mounting Position: horizontal or vertical
Nominal Thread Size: 0.563 inches 2nd end
Nominal Thread Size: 0.750 inches 1st end
Seat Angle: 37.0 degrees 1st end
Seat Angle: 37.0 degrees 2nd end
Material: aluminum body
Material: iron cast flow control device
Style Designator: straight thru
Thread Series Designator: unf 1st end
Thread Series Designator: unf 2nd end

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
37C301075P105	Restrictor Check Valve
K-1221-8-10	Restrictor Check Valve

FAQs

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

What is the FSCG of the NSN 4820-01-052-9688?

The FSCG of the NSN 4820-01-052-9688 is 4820

Does the NSN 4820-01-052-9688 have a Schedule B code assigned?

Yes, the Schedule B code is 8481309000

Does NSN 4820-01-052-9688 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 4820-01-052-9688 contain precious materials?

Precious metal content is unknown

Does NSN 4820-01-052-9688 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 4820-01-052-9688 was assigned to the Federal Catalog?

It was assigned 48 years ago, on Thu, Dec 22, 1977