4820-01-140-7475

Find complete technical information, availability, and procurement data for: 4820-01-140-7475
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-140-7475

Item Name Code

20520

Assigment Date

10/18/1982 (43 years ago)

A spring-tempered wire item used to secure a stud, turnlock fastener or stud assembly, turnlock fastener by engaging with the cammed groove of the stud, turnlock fastener and securing it by means of its spring action.

right-hand 2nd end thread direction, 3b 1st end thread class, 3a 2nd end thread class, right-hand 1st end thread direction, 0.030 inches nominal aperture diameter

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 2nd end
Thread Class: 3b 1st end
Thread Direction: right-hand 1st end
Thread Direction: right-hand 2nd end
Aperture Diameter: 0.030 inches nominal
Flow Control Device: poppet
Connection Style: external seat for gasket seal (boss) 2nd end
Connection Style: gasket seal (boss) 1st end
Valve Operation Method: automatic
Connection Type: threaded external boss 2nd end
Connection Type: threaded internal boss 1st end
Mounting Position: horizontal
Thread Quantity Per Inch: 18 1st end
Nominal Thread Size: 0.562 inches 1st end
Nominal Thread Size: 0.562 inches 2nd end
Special Features: installation of jam nut and torque to 10 inch pounds
Material: aluminum alloy overall
Style Designator: straight thru
Thread Series Designator: unjs 2nd end

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
4820-00-762-8869	No Name Available	06/01/2002

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
6125-5	Restrictor Check Valve
A51H9088-3	Restrictor Check Valve
A51H9088-5	Restrictor Check Valve

FAQs

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

What is the FSCG of the NSN 4820-01-140-7475?

The FSCG of the NSN 4820-01-140-7475 is 4820

Does the NSN 4820-01-140-7475 have a Schedule B code assigned?

Yes, the Schedule B code is 8481309000

Does NSN 4820-01-140-7475 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 4820-01-140-7475 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-140-7475 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 4820-01-140-7475 was assigned to the Federal Catalog?

It was assigned 43 years ago, on Mon, Oct 18, 1982