2256577

View detailed technical data, stock status, and sourcing information for: 2256577
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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.

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

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Below is a list of NSNs that have been officially superseded by this NSN: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