4820-01-551-1121

Find complete technical information, availability, and procurement data for: 4820-01-551-1121
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-551-1121

Item Name Code

05488

Assigment Date

05/08/2007 (19 years ago)

A switch that is externally actuated by a device such as a push rod or button, which requires pushing for each actuation. The action may be momentary, with mechanical return. It consists of a body,switch and a push button. The item may include provisions for mounting indicating lamps or light emitting diodes in the actuator. Includes items consisting of individually separable switches that are physically interlocked, that have a common actuator, or are electrically connected. Excludes: light-switch; light-switch assembly; switch,beam selecting,headlight; switch,foot; switch,interlock; switch,pressure; switch,push-pull; switch,sensitive and switch assembly. For devices which start, stop, reverse, select and/or regulate the speed of a motor, see starter,motor and controller,motor.

spring disk loading method, -40.0 fahrenheit minimum operating temp, right-hand 1st end thread direction, 275.0 fahrenheit single response maximum operating temp, poppet flow control device

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
Disk Loading Method: spring
Maximum Operating Temp: 275.0 fahrenheit single response
Minimum Operating Temp: -40.0 fahrenheit
End Item Identification: new construction lhd8
Connection Style: plain (pipe) 1st end
Valve Operation Method: automatic
Connection Type: threaded external pipe 1st end
Adjustable Pressure Range: +5.6 to 13.9 pounds per square inch
Maximum Operating Pressure: 200.0 pounds per square inch single response
Nominal Thread Size: 0.250 inches 1st end
Opening Pressure Setting: 8.0 pounds per square inch
Part Name Assigned By Controlling Agency: adjustable popoff relief valve
Special Features: adjustable poppet valve, zero leakage, out to atmoshere; temperature range determined my seal material
Material: copper alloy body
Media For Which Designed: air single response
Style Designator: straight thru
Thread Series Designator: npt 1st end
Furnished Items And Quantity: 1 deflector cap

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
D559B-2M-D-8	Safety Relief Valve

FAQs

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

What is the FSCG of the NSN 4820-01-551-1121?

The FSCG of the NSN 4820-01-551-1121 is 4820

Does the NSN 4820-01-551-1121 have a Schedule B code assigned?

Yes, the Schedule B code is 8481400000

Does NSN 4820-01-551-1121 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 4820-01-551-1121 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-551-1121 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 4820-01-551-1121 was assigned to the Federal Catalog?

It was assigned 19 years ago, on Tue, May 8, 2007