2256577 1/2IN

View detailed technical data, stock status, and sourcing information for: 2256577 1/2IN
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-00-904-8990

Item Name Code

20962

Assigment Date

06/15/1966 (60 years ago)

An item in the form of one or more thin flexible sheets normally designed to form a tight seal between chambers of a valve, and to transmit motion to a valve disk either directly or through a mechanical linkage. The surface of the item(s) may not be formed or molded to have a beaded or rolled edge, ribs, or any other raised surfaces. The item may contain bolt holes and/or a center hole. Excludes:diaphragm, valve, special shaped and gasket.

threaded internal pipe all ends connection type, 100.0 fahrenheit single response maximum operating temp, plain,optional end(pipe) all ends connection style, manual valve operation method, right-hand all ends thread direction

Product Characteristics

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

Thread Direction: right-hand all ends
Maximum Operating Temp: 100.0 fahrenheit single response
Connection Style: plain,optional end(pipe) all ends
Valve Operation Method: manual
Connection Type: threaded internal pipe all ends
Maximum Operating Pressure: 150.0 pounds per square inch 1st response
Maximum Operating Pressure: 600.0 pounds per square inch 2nd response
Nominal Thread Size: 0.500 inches all ends
Material: copper alloy body
Material: copper alloy flow control device
Material: copper alloy stem
Material: plastic polytetrafluoroethylene packing
Material: plastic polytetrafluoroethylene seat
Media For Which Designed: steam 1st response
Media For Which Designed: water-oil-gas 2nd response
Style Designator: straight thru
Thread Series Designator: npt all ends
Furnished Items And Quantity: 1 handle

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
4820-00-865-6593	No Name Available	11/01/1981
4820-01-052-0076	No Name Available	12/01/1990
4820-01-119-5124	No Name Available	08/01/1992

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
1/2-A1100TT	Ball Valve
1/2-A11TT	Ball Valve
1/2AZ-3600TTD	Ball Valve
1/2AZ-3636TT	Ball Valve
1/2INA11TT	Ball Valve
1/2Z-3636TT	Ball Valve
2256577	Ball Valve
2256577 1/2IN	Ball Valve
747-1/2	Ball Valve
A11TT1-2	Ball Valve
FIG 350 -1/2	Ball Valve
GV500WV	Ball Valve
GV500WV1	Ball Valve

FAQs

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

What is the FSCG of the NSN 4820-00-904-8990?

The FSCG of the NSN 4820-00-904-8990 is 4820

Does NSN 4820-00-904-8990 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 4820-00-904-8990 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-00-904-8990 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 4820-00-904-8990 was assigned to the Federal Catalog?

It was assigned 60 years ago, on Wed, Jun 15, 1966