4820-01-344-3933

Find complete technical information, availability, and procurement data for: 4820-01-344-3933
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-344-3933

Item Name Code

20962

Assigment Date

08/28/1991 (34 years ago)

A metallic, threaded, screw-shaped item used in hydraulic brake cylinders, hydraulic power units, missile launching hydraulic systems, and the like, for the purpose of providing a means of releasing air form and/or flushing a hydraulic system. It may be furnished with or without a dust cap. Excludes:spring loaded or automatic type air pressure relief valves, and bolt, fluid passage.

8 all ends bolt hole quantity, bolted bonnet attachment method, manual valve operation method, round with holes all ends flange shape, inside screw bonnet type

Product Characteristics

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

Bonnet Type: inside screw
Bonnet Attachment Method: bolted
Bolt Hole Quantity: 8 all ends
Valve Operation Method: manual
Flange Shape: round with holes all ends
Connection Type: flange all ends
Valve Size: 4.000 inches
Nominal Outside Diameter: 9.000 inches all ends
Face To Face Distance: 12.940 inches
Nominal Thickness: 0.688 inches all ends
Bolt Hole Nominal Diameter: 0.750 inches all ends
Bolt Circle Nominal Diameter: 7.500 inches all ends
Flange Face Design: raised straight all ends
Raised Face Nominal Height: 0.062 inches all ends
Raised Face Nominal Diameter: 6.188 inches all ends
Material: bronze bodyplastic polytetrafluoroethylene seatsteel comp 316 stem
Style Designator: straight thru flanged ends

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
4820-01-359-2354	No Name Available	10/01/1993

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
SP-B-20-F15 4IN	Ball Valve
SPB-20-F152-4IN	Ball Valve
SPB-20-F152/B0-4.00IN	Ball Valve
SPB-L1L-A	Ball Valve

FAQs

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

What is the FSCG of the NSN 4820-01-344-3933?

The FSCG of the NSN 4820-01-344-3933 is 4820

Does the NSN 4820-01-344-3933 have a Schedule B code assigned?

Yes, the Schedule B code is 8481805090

Does NSN 4820-01-344-3933 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 4820-01-344-3933 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-344-3933 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 4820-01-344-3933 was assigned to the Federal Catalog?

It was assigned 34 years ago, on Wed, Aug 28, 1991