4820-01-256-8554

Find complete technical information, availability, and procurement data for: 4820-01-256-8554
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-256-8554

Item Name Code

16996

Assigment Date

06/09/1987 (39 years ago)

A valve designed to release under excessive pressure and/or excessive temperature by opening at a predetermined pressure and/or temperature. Thermostatically operated valves close when the pressure is relieved or the temperature is reduced. Fusible plug valves require replacement of the plug. See also valve, safety relief and valve, regulating. Temperature.

cleaning, packaging, and marking iaw the latest revision of mil-std-1330 reference number differentiating characteristics, zzzy criticality code justification

Product Characteristics

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

Criticality Code Justification: zzzy
Reference Number Differentiating Characteristics: cleaning, packaging, and marking iaw the latest revision of mil-std-1330

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
20270-00787B	Pressure and Temper Relief Valve
20270-00787BCP	Pressure and Temper Relief Valve
D42UU-07 1/2 X 3/4	Pressure and Temper Relief Valve
D42UU-07S-1/2-3/4	Pressure and Temper Relief Valve

FAQs

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

What is the FSCG of the NSN 4820-01-256-8554?

The FSCG of the NSN 4820-01-256-8554 is 4820

Does the NSN 4820-01-256-8554 have a Schedule B code assigned?

Yes, the Schedule B code is 8481400000

Does NSN 4820-01-256-8554 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 4820-01-256-8554 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-256-8554 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 4820-01-256-8554 was assigned to the Federal Catalog?

It was assigned 39 years ago, on Tue, Jun 9, 1987