S2981D

View detailed technical data, stock status, and sourcing information for: S2981D
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-00-446-3585

Item Name Code

05488

Assigment Date

01/01/1963 (63 years ago)

spring disk loading method, 8 1st end bolt hole quantity, inside spring bonnet type, disk flow control device, threaded bonnet attachment method

Product Characteristics

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

Flow Control Device: disk
Bonnet Type: inside spring
Bonnet Attachment Method: threaded
Disk Loading Method: spring
Bolt Hole Quantity: 8 1st end
Maximum Operating Temp: 425.0 fahrenheit single response
Valve Operation Method: automatic
Flange Shape: round with holes 1st end
Connection Type: flange 1st end
Adjustable Pressure Range: +26.0 to 75.0 pounds per square inch
Maximum Operating Pressure: 100.0 pounds per square inch single response
Nominal Outside Diameter: 6.625 inches 1st end
Nominal Thickness: 0.500 inches 1st end
Bolt Hole Nominal Diameter: 0.562 inches 1st end
Bolt Circle Nominal Diameter: 5.500 inches 1st end
Flange Face Design: plain 1st end
Special Features: modified with flanged ends and flat disk
Material: copper alloy body
Material: copper alloy flow control device
Material: copper alloy seat
Material: copper alloy stem
Style Designator: angle

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
3306452	Safety Relief Valve
81125S41-21502PC11	Safety Relief Valve
S2981D	Safety Relief Valve

FAQs

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

What is the FSCG of the NSN 4820-00-446-3585?

The FSCG of the NSN 4820-00-446-3585 is 4820

Does the NSN 4820-00-446-3585 have a Schedule B code assigned?

Yes, the Schedule B code is 8481400000

Does NSN 4820-00-446-3585 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 4820-00-446-3585 contain precious materials?

Precious metal content is unknown

Does NSN 4820-00-446-3585 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 4820-00-446-3585 was assigned to the Federal Catalog?

It was assigned 63 years ago, on Tue, Jan 1, 1963