1656341

View detailed technical data, stock status, and sourcing information for: 1656341
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-013-9721

Item Name Code

20520

Assigment Date

12/12/1975 (50 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.

0.120 inches nominal aperture diameter, disk flow control device, pressed-in renewable seat ring type, right-hand all ends thread direction, spring disk loading method

Product Characteristics

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

Thread Direction: right-hand all ends
Aperture Diameter: 0.120 inches nominal
Flow Control Device: disk
Disk Loading Method: spring
Renewable Seat Ring Type: pressed-in
Connection Style: plain, optional end (pipe) all ends
Valve Operation Method: automatic
Connection Type: threaded internal pipe all ends
Mounting Position: horizontal
Maximum Operating Pressure: 1000.0 pounds per square inch single response
Nominal Thread Size: 0.250 inches all ends
Special Features: ported brass ball in secondary ofifice
Material: copper alloy 360 body
Material: rubber butadiene-acrylonitrile class nbr packing
Material: steel corrosion resisting flow control device
Material Document And Classification: mil-g-1149,type 2,class 5 mil spec single material response packing
Material Document And Classification: qq-b-626,alloy 360 fed spec single material response body
Media For Which Designed: air 1st response
Media For Which Designed: butane 2nd response
Media For Which Designed: fuel/oil, hydrocarbon 3rd response
Media For Which Designed: helium 4th response
Style Designator: straight thru
Supplementary Features: additional flow control device: stem
Thread Series Designator: npt all ends
Furnished Items And Quantity: 1 nut

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
4820-00-494-9854	No Name Available	10/01/1990

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
1-1256-1-1/4IPT	Restrictor Check Valve
1656341	Restrictor Check Valve
1656341REVD	Restrictor Check Valve
410 1-4	Restrictor Check Valve
410-1-4B2	Restrictor Check Valve
8-1254-4	Restrictor Check Valve
BUWEPSDWG1656341	Restrictor Check Valve

FAQs

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

What is the FSCG of the NSN 4820-01-013-9721?

The FSCG of the NSN 4820-01-013-9721 is 4820

Does the NSN 4820-01-013-9721 have a Schedule B code assigned?

Yes, the Schedule B code is 8481301090

Does NSN 4820-01-013-9721 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 4820-01-013-9721 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-013-9721 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 4820-01-013-9721 was assigned to the Federal Catalog?

It was assigned 50 years ago, on Fri, Dec 12, 1975