255-1531

View detailed technical data, stock status, and sourcing information for: 255-1531
DODParts.com distributes related products varnishes dopes paints, aircraft parts and consumables, electrical parts, fittings and other components for the aerospace and defense industries. Submit the short price quote form for part 255-1531 to receive an up to date pricing and availability quote by email.

Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-656-3373

Item Name Code

05488

Assigment Date

06/27/2016 (10 years ago)

An item fabricated from a single, internally cored casting, or composed of two or more separate castings, and designed to position and protect bearings, shafts, gears, and/or other components required for a mechanical drive. Includes items having access hole(s) to facilitate machining and assembling of components. It may include the access hole cover plate(s).

2566-01-633-8373 end item identification, threaded bonnet attachment method, spring disk loading method, threaded external tube 1st end connection type, inside spring bonnet type

Product Characteristics

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

Bonnet Type: inside spring
Bonnet Attachment Method: threaded
Disk Loading Method: spring
End Item Identification: 2566-01-633-8373
Connection Type: threaded external tube 1st end
Connection Type: threaded internal tube 2nd end
Valve Size: 0.25 inches
Adjustable Pressure Range: +5000.00 to 6000.00 pounds per square inch
First Connection Face To Centerline Distance: 1.60 inches
Second Connection Face To Centerline Distance: 1.44 inches
Part Name Assigned By Controlling Agency: proportional relief valve
Material: steel comp 316 body
Material: steel comp 316 seat
Material: steel comp 316 stem
Material Document And Classification: astm a182 assn std single material response body
Material Document And Classification: astm a479 assn std single material response seat
Material Document And Classification: astm a479 assn std single material response stem
Style Designator: angle

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
255-1531	Safety Relief Valve
SS-4R3A-SETH	Safety Relief Valve

FAQs

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

What is the FSCG of the NSN 4820-01-656-3373?

The FSCG of the NSN 4820-01-656-3373 is 4820

Does the NSN 4820-01-656-3373 have a Schedule B code assigned?

Yes, the Schedule B code is 8481400000

Does NSN 4820-01-656-3373 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 4820-01-656-3373 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-656-3373 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 4820-01-656-3373 was assigned to the Federal Catalog?

It was assigned 10 years ago, on Mon, Jun 27, 2016