20/5.4.2.1 ALT4

View detailed technical data, stock status, and sourcing information for: 20/5.4.2.1 ALT4
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-440-4781

Item Name Code

05492

Assigment Date

01/15/1997 (29 years ago)

identical second end relationship with first end, straight thru body style, right-hand first end thread direction, threaded internal pipe first end connection type, plain first end style designator

Product Characteristics

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

Body Style: straight thru
First End Connection Type: threaded internal pipe
First End Style Designator: plain
First End Thread Direction: right-hand
Second End Relationship With First End: identical
Flow Control Device: double seated
End Connection Quantity: 2
Two-Way Valve Action: direct acting
Capillary Tube Length: 120.000 inches nominal
Bulb Length: 7.735 inches nominal
Bulb Diameter: 0.625 inches nominal
Temp Adjustability: not adjustable
Thermostatic Element: liquid immersion type
End Item Identification: strategic sealift conversion ships class
Temp Rating: 70.0 fahrenheit minimum and 170.0 fahrenheit maximum
Material: aluminum body
Material: copper alloy bulb
Material: plastic polyamide (nylon) seat
Material: steel corrosion resisting stem
Thread Size And Series/Type Designator: 1/4-18 npt first end

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
20/5.4.2.1 ALT4	Temperature Regulating Valve
BP-2 70-170 DEG F 10FT	Temperature Regulating Valve

FAQs

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

What is the FSCG of the NSN 4820-01-440-4781?

The FSCG of the NSN 4820-01-440-4781 is 4820

Does the NSN 4820-01-440-4781 have a Schedule B code assigned?

Yes, the Schedule B code is 8481809015

Does NSN 4820-01-440-4781 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 4820-01-440-4781 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-440-4781 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 4820-01-440-4781 was assigned to the Federal Catalog?

It was assigned 29 years ago, on Wed, Jan 15, 1997