3R1548

View detailed technical data, stock status, and sourcing information for: 3R1548
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-00-977-6284

Item Name Code

05488

Assigment Date

10/12/1966 (59 years ago)

A valve having an orifice in the poppet, disk, or the like, to permit restricted fluid flow when the valve is seated. It does not have a stem or provisions for pressure adjustments, and is similar to a valve, check with the exception of the orifice which permits fluid flow in more than one direction.

right-hand 1st end thread direction, poppet flow control device, packing retaining bonnet type, 3a 1st end thread class, 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.

Thread Class: 3a 1st end
Thread Direction: right-hand 1st end
Flow Control Device: poppet
Bonnet Type: packing retaining
Disk Loading Method: spring
Valve Discharge Flow Rate: 0.267 cubic feet per minute
Maximum Operating Temp: 275.0 fahrenheit single response
Connection Style: flared (tube) 1st end
Valve Operation Method: automatic
Connection Type: threaded external tube 1st end
Features Provided: pressure tight outlet side
Maximum Operating Pressure: 30.0 pounds per square inch single response
Nominal Thread Size: 0.562 inches 1st end
Seat Angle: 37.0 degrees 1st end
Opening Pressure Setting: 2.0 pounds per square inch
Nominal Outside Diameter Tube Accommodated: 0.375 inches 1st end
Material: steel corrosion resisting body
Material: steel corrosion resisting seat
Material: steel flow control device
Material Document And Classification: mil-s-18732 mil spec single material response body
Material Document And Classification: mil-s-18732 mil spec single material response seat
Media For Which Designed: air 1st response
Media For Which Designed: hydraulic fluid, phosphate-ester base 2nd response
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
3R1548	Safety Relief Valve

FAQs

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

What is the FSCG of the NSN 4820-00-977-6284?

The FSCG of the NSN 4820-00-977-6284 is 4820

Does the NSN 4820-00-977-6284 have a Schedule B code assigned?

Yes, the Schedule B code is 8481400000

Does NSN 4820-00-977-6284 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 4820-00-977-6284 contain precious materials?

Precious metal content is unknown

Does NSN 4820-00-977-6284 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 4820-00-977-6284 was assigned to the Federal Catalog?

It was assigned 59 years ago, on Wed, Oct 12, 1966