4820-00-400-6571

Find complete technical information, availability, and procurement data for: 4820-00-400-6571
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-00-400-6571

Item Name Code

05487

Assigment Date

03/12/1969 (57 years ago)

A tubular metal item designed primarily as a replaceable wear surface within the cylinder bore of a piston type internal combustion engine, compressor, or reciprocating pump.

spring disk loading method, 2a all ends thread class, external seat for gasket seal (boss) all ends connection style, right-hand all ends thread direction, poppet flow control device

Product Characteristics

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

Thread Class: 2a all ends
Thread Direction: right-hand all ends
Flow Control Device: poppet
Disk Loading Method: spring
Connection Style: external seat for gasket seal (boss) all ends
Valve Operation Method: automatic
Connection Type: threaded external boss all ends
Mounting Position: horizontal or vertical
Thread Quantity Per Inch: 12 all ends
Maximum Operating Pressure: 3000.0 pounds per square inch single response
Nominal Thread Size: 1.750 inches all ends
Nominal Outside Diameter Tube Accommodated: 1.250 inches 1st end
Material: steel comp 303 body
Material: steel comp 303 seat
Material: steel comp 416 flow control device
Material Document And Classification: fed std 66,aisi 303/sae 30303 fed std single material response seat
Material Document And Classification: fed std 66,aisi 416/sae 51416 fed std single material response flow control device
Material Document And Classification: fed-std-66, aisi 303/sae 30303 fed std single material response body
Media For Which Designed: air single response
Surface Treatment: passivate
Style Designator: straight thru
Thread Series Designator: un all ends

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
C44335	Check Valve
V1-13-2ANDS8-1-1	Check Valve

FAQs

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

What is the FSCG of the NSN 4820-00-400-6571?

The FSCG of the NSN 4820-00-400-6571 is 4820

Does the NSN 4820-00-400-6571 have a Schedule B code assigned?

Yes, the Schedule B code is 8481302090

Does NSN 4820-00-400-6571 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 4820-00-400-6571 contain precious materials?

Precious metal content is unknown

Does NSN 4820-00-400-6571 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 4820-00-400-6571 was assigned to the Federal Catalog?

It was assigned 57 years ago, on Wed, Mar 12, 1969