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4201 Check Valve

4820-00-528-2356

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Official Item Classification

Name
Check Valve
Part Number
4201
(NSN) National Stock Number
4820-00-528-2356
(FSG) Federal Supply Group
48 Valves
(FSC) Federal Supply Classification
4820 Nonpowered Valves
(INC) Item Name Code
05487
(FIIG) Federal Item Identification Guide
A530B0
Date
01/01/1963 (63 years ago)

3a 1st end thread class, right-hand 2nd end thread direction, 0.250 inches 2nd end nominal pipe size accommodated, cone flow control device, right-hand 1st end thread direction

Specs & Compatibility

Nominal Pipe Size Accommodated

0.250 inches 2nd end

Thread Class

3a 1st end

Thread Direction

right-hand 1st end

Thread Direction

right-hand 2nd end

Flow Control Device

cone

Connection Style

inverted flare (tube) 2nd end

Connection Type

threaded external pipe 2nd end

Connection Type

threaded external tube 1st end

Mounting Position

horizontal

Thread Quantity Per Inch

18 2nd end

Thread Quantity Per Inch

20 1st end

Maximum Operating Pressure

450.0 pounds per square inch single response

Nominal Thread Size

0.250 inches 2nd end

Nominal Thread Size

0.500 inches 1st end

Seat Angle

37.0 degrees 1st end

Face To Face Distance

2.125 inches

Nominal Outside Diameter Tube Accommodated

0.312 inches 1st end

Media For Which Designed

oxygen, gaseous single response

Style Designator

straight thru

Test Data Document

"81349-mil-v-7908 specification (includes engineering type bulletins, brochures,etc., that reflect specification type data in specification format; excludes commercial catalogs, industry directories, and similar trade publications, reflecting general type data on certain environmental and performance requirements and test conditions that are shown as "typical", "average", "nominal", etc.)."

Thread Series Designator

anpt 2nd end

Thread Series Designator

unf 1st end

Nondefinitive Spec/Std Data

g style

Regulatory Compliance

Precious Metals Indicator
A

Item does not contain precious metal.

Criticality Code
X

The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.

Hazardous Metals Indicator
N

Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.

Pseudo Item Name Code

0005487

Related Hardware Products

Part Number Description
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Frequently Asked Questions

What is the FSCG of the NSN 4820-00-528-2356?
The FSCG of the NSN 4820-00-528-2356 is 4820
Does the NSN 4820-00-528-2356 have a Schedule B code assigned?
Yes, the Schedule B code is 8481301090
Does NSN 4820-00-528-2356 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 4820-00-528-2356 contain precious materials?
Item does not contain precious metal.
Does NSN 4820-00-528-2356 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 4820-00-528-2356 was assigned to the Federal Catalog?
It was assigned 63 years ago, on Tue, Jan 1, 1963