H3178168B1-2IN2

View detailed technical data, stock status, and sourcing information for: H3178168B1-2IN2
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-00-529-2648

Item Name Code

05488

Assigment Date

01/01/1963 (63 years ago)

A valve designed to automatically release excessive pressures. It is actuated by static pressure upstream of the valve and is used as a safety valve or relief valve, and may be set to close at a predetermined pressure. It is not designed for regulation of continuously fluctuating loads. It may be inline or cartridge (manifold) design. Excludes:valve (1), relief, pressure and temperature.

inside spring bonnet type, right-hand 1st end thread direction, spring disk loading method, poppet 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.

Thread Direction: right-hand 1st end
Flow Control Device: poppet
Bonnet Type: inside spring
Bonnet Attachment Method: threaded
Disk Loading Method: spring
Connection Style: plain (pipe) 1st end
Valve Operation Method: automatic or manual
Connection Type: threaded external pipe 1st end
Features Provided: valve stem lock shield
Adjustable Pressure Range: +251.0 to 400.0 pounds per square inch
Maximum Operating Pressure: 400.0 pounds per square inch single response
Nominal Thread Size: 1.500 inches 1st end
Material: copper alloy overall
Media For Which Designed: air single response
Style Designator: angle
Thread Series Designator: npt 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
1704 1-2	Safety Relief Valve
23MA-1/2IN.	Safety Relief Valve
H3178168B1-2IN2	Safety Relief Valve

FAQs

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

What is the FSCG of the NSN 4820-00-529-2648?

The FSCG of the NSN 4820-00-529-2648 is 4820

Does the NSN 4820-00-529-2648 have a Schedule B code assigned?

Yes, the Schedule B code is 8481400000

Does NSN 4820-00-529-2648 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 4820-00-529-2648 contain precious materials?

Precious metal content is unknown

Does NSN 4820-00-529-2648 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 4820-00-529-2648 was assigned to the Federal Catalog?

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