1975C

View detailed technical data, stock status, and sourcing information for: 1975C
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-00-843-5743

Item Name Code

05488

Assigment Date

01/01/1962 (64 years ago)

right-hand 2nd end thread direction, poppet flow control device, 0.750 inches 2nd end nominal pipe size accommodated, 1.000 inches 1st end nominal pipe size accommodated, right-hand 1st end thread direction

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: 0.750 inches 2nd end
Nominal Pipe Size Accommodated: 1.000 inches 1st end
Thread Direction: right-hand 1st end
Thread Direction: right-hand 2nd end
Flow Control Device: poppet
Bonnet Type: inside spring
Bonnet Attachment Method: threaded
Disk Loading Method: spring
Valve Discharge Flow Rate: 270.0 pounds per hour
Connection Style: plain (pipe) 2nd end
Connection Style: plain,optional end(pipe) 1st end
Valve Operation Method: automatic
Connection Type: threaded external pipe 2nd end
Connection Type: threaded internal pipe 1st end
Features Provided: bonnet packing and pressure tight outlet side
Thread Quantity Per Inch: 11-1/2 1st end
Thread Quantity Per Inch: 14 2nd end
Maximum Operating Pressure: 2000.0 pounds per square inch single response
Nominal Thread Size: 0.750 inches 2nd end
Nominal Thread Size: 1.000 inches 1st end
Opening Pressure Setting: 110.0 pounds per square inch
Material: steel corrosion resisting overall
Media For Which Designed: steam single response
Style Designator: angle
Thread Series Designator: npt 2nd end
Thread Series Designator: npt 1st end
Reference Number Differentiating Characteristics: as differentiatedby valve size and set pressure

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
1975C	Safety Relief Valve

FAQs

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

What is the FSCG of the NSN 4820-00-843-5743?

The FSCG of the NSN 4820-00-843-5743 is 4820

Does the NSN 4820-00-843-5743 have a Schedule B code assigned?

Yes, the Schedule B code is 8481400000

Does NSN 4820-00-843-5743 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 4820-00-843-5743 contain precious materials?

Precious metal content is unknown

Does NSN 4820-00-843-5743 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 4820-00-843-5743 was assigned to the Federal Catalog?

It was assigned 64 years ago, on Mon, Jan 1, 1962