HC1/2FW551/4-1/2

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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-00-925-4319

Item Name Code

05493

Assigment Date

01/20/1966 (60 years ago)

A straight shaft having two or more of the following conditions: a specified surface finish designation in the range of 1 to 125 microinches (o.o25 to 3.2 micrometers), arithmetical average (aa), machined peripheral flat(s), circular groove (s), keyway(s), splines, threads, or holes. It is not designed for use in aligning by fitting into corresponding holes of another item. It may be drilled for lubricating holes. For items having an integral gear(s) or worm(s), see gearshaft (as modified). For items designed to support rotating members see axle(1), straight. For items not having the above conditions see pin, straight, headless. For items having machined ends which constitute steps see shaft(1), shouldered; axle(1), shouldered; and bolt, fluid passage.

bulb clamp furnished items, threaded external tube first end connection type, flared first end style designator, refrigerant 12 media for which designed, "angle give "adqm" or "adqn" if flanged one or two ends" body style

Product Characteristics

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

Body Style: "angle give "adqm" or "adqn" if flanged one or two ends"
Furnished Items: bulb clamp
Media For Which Designed: refrigerant 12
First End Connection Type: threaded external tube
First End Style Designator: flared
First End Outside Diameter Tube Accommodated: 0.500 inches nominal
First End Thread Class: 3a
First End Thread Direction: right-hand
Second End Relationship With First End: not identical
Second End Connection Type: threaded external tube
Second End Style Designator: flared
Second End Outside Diameter Tube Accommodated: 0.250 inches nominal
Second End Thread Class: 3a
Second End Thread Direction: right-hand
First End Seat Angle In Deg: 45.0
Second End Seat Angle In Deg: 45.0
Flow Control Device: disk, flat
End Connection Quantity: 2
Capillary Tube Length: 60.000 inches nominal
Bulb Length: 3.438 inches nominal
Bulb Diameter: 0.500 inches nominal
Valve Expansion Control Type: thermostatic
Valve Evaporator Temp Range Designation: high
Valve Pressure Limiting Device: not included
Bulb Media Type: refrigerant 12
Bulb Mounting Method: clamp
Valve Equalizer Location: internal
Refrigeration Capacity In Btu Per Hour: 12.0
Special Features: temp rating: -50.0 deg fahrenheit to 50.0 deg fahrenheit
Material: copper alloy body
Material: steel corrosion resisting flow control device
Material: steel corrosion resisting seat

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
402NP4F45-5FT	Expansion Valve
HC1/2FW551/4-1/2	Expansion Valve
HC1/2FW551/4-1/2SAE5FT	Expansion Valve

FAQs

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

What is the FSCG of the NSN 4820-00-925-4319?

The FSCG of the NSN 4820-00-925-4319 is 4820

Does the NSN 4820-00-925-4319 have a Schedule B code assigned?

Yes, the Schedule B code is 8481809050

Does NSN 4820-00-925-4319 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 4820-00-925-4319 contain precious materials?

Precious metal content is unknown

Does NSN 4820-00-925-4319 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 4820-00-925-4319 was assigned to the Federal Catalog?

It was assigned 60 years ago, on Thu, Jan 20, 1966