9979B51M

View detailed technical data, stock status, and sourcing information for: 9979B51M
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-284-4242

Item Name Code

05488

Assigment Date

08/24/1988 (37 years ago)

150.0 fahrenheit single response maximum operating temp, 0.375 inches 2nd end nominal pipe size accommodated, disk flow control device, 1.250 inches 1st end nominal pipe size accommodated, spring disk loading method

Product Characteristics

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

Nominal Pipe Size Accommodated: 0.375 inches 2nd end
Nominal Pipe Size Accommodated: 1.250 inches 1st end
Flow Control Device: disk
Disk Loading Method: spring
Maximum Operating Temp: 150.0 fahrenheit single response
End Item Identification: forrestal class cv
Connection Style: socket with brazing ring all ends
Valve Operation Method: manual
Connection Type: unthreaded internal pipe all ends
Adjustable Pressure Range: +1401.0 to 1800.0 pounds per square inch
Maximum Operating Pressure: 3000.0 pounds per square inch single response
Criticality Code Justification: zzzy
Opening Pressure Setting: 1401.0 pounds per square inch
Material: copper alloy 922 body
Material: nickel alloy 400 or nickel alloy r-405 seat
Material: nickel alloy 400 or nickel alloy r-405 stem
Material Document And Classification: astm b61 assn std single material response body
Material Document And Classification: qq-n-281 fed spec single material response seat
Material Document And Classification: qq-n-281 fed spec single material response stem
Style Designator: angle
Furnished Items And Quantity: 2 tailpiece and 1 plugged drain and 1 wrench
Reference Number Differentiating Characteristics: cleaning, packaging, and marking iaw the latest revision of mil-std-1330

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
9979B51M	Safety Relief Valve
9979B51MCP	Safety Relief Valve

FAQs

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

What is the FSCG of the NSN 4820-01-284-4242?

The FSCG of the NSN 4820-01-284-4242 is 4820

Does the NSN 4820-01-284-4242 have a Schedule B code assigned?

Yes, the Schedule B code is 8481400000

Does NSN 4820-01-284-4242 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 4820-01-284-4242 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-284-4242 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 4820-01-284-4242 was assigned to the Federal Catalog?

It was assigned 37 years ago, on Wed, Aug 24, 1988