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4820-00-203-9390

Find complete technical information, availability, and procurement data for: 4820-00-203-9390

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4820-00-203-9390
Federal Supply Group
Valves
Federal Supply Classification
4820 Nonpowered Valves
National Stock Number
4820-00-203-9390
Item Name Code
16989
Assigment Date
01/01/1963 (63 years ago)

"an item designed to drain fluids from fuel systems, tanks, filters, or similar items. It has a mounting end, a free flowing end, and a quick-acting nonmetallic sealed closure, usually spring loaded, that holds it in an "off" position. It requires no lubrication other than from the fluid being drained."

3a 1st end thread class, manual valve operation method, 20 1st end thread quantity per inch, right-hand 1st end thread direction, poppet flow control device

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 1st end
Thread Direction
right-hand 1st end
Flow Control Device
poppet
Valve Operation Method
manual
Thread Quantity Per Inch
20 1st end
Maximum Operating Pressure
60.0 pounds per square inch 1st response
Nominal Thread Size
0.437 inches 1st end
Seat Angle
37.0 degrees 1st end
Nominal Outside Diameter Tube Accommodated
0.250 inches 1st end
Material
aluminum alloy body
Media For Which Designed
fuel/oil, hydrocarbon single response
Surface Treatment
anodize
Style Designator
straight thru
Thread Series Designator
unf 1st 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
633971-3 Poppet Drain Cock
740B3 Poppet Drain Cock

FAQs

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

What is the FSCG of the NSN 4820-00-203-9390?
The FSCG of the NSN 4820-00-203-9390 is 4820
Does the NSN 4820-00-203-9390 have a Schedule B code assigned?
Yes, the Schedule B code is 8481909090
Does NSN 4820-00-203-9390 require demilitarization?
Usml items - mutilation to the point of scrap required worldwide. (note 7).
Does NSN 4820-00-203-9390 contain precious materials?
Precious metal content is unknown
Does NSN 4820-00-203-9390 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 4820-00-203-9390 was assigned to the Federal Catalog?
It was assigned 63 years ago, on Tue, Jan 1, 1963

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