257486

View detailed technical data, stock status, and sourcing information for: 257486
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Federal Supply Group

Pumps and Compressors

Federal Supply Classification

4320 Power and Hand Pumps

National Stock Number

4320-00-218-3778

Item Name Code

22534

Assigment Date

01/01/1963 (63 years ago)

A cylindrical item with or without flange(s), designed to be inserted in a pump casing or secured to the impeller of a centrifugal pump. It is used for the purpose of providing a close running clearance between the impeller and casing in order to prevent or overcome leakage due to erosion. It may also be used as a diffuser ring in the suction and discharge throats of valves.

square all corners corner shape, 5.250 inches nominal body outside diameter, 4.623 inches minimum and 4.624 inches maximum body inside diameter, plain body style, 0.750 inches nominal overall length

Product Characteristics

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

Body Style: plain
Overall Length: 0.750 inches nominal
Body Outside Diameter: 5.250 inches nominal
Body Inside Diameter: 4.623 inches minimum and 4.624 inches maximum
Corner Shape: square all corners
Material: copper alloy
Material Document And Classification: qq-n-288,comp a fed spec single material response

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
12921P	Wearing Ring
257486	Wearing Ring
SL7486PC31	Wearing Ring
SL7674PC31	Wearing Ring

FAQs

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

What is the FSCG of the NSN 4320-00-218-3778?

The FSCG of the NSN 4320-00-218-3778 is 4320

Does the NSN 4320-00-218-3778 have a Schedule B code assigned?

Yes, the Schedule B code is 8413919520

Does NSN 4320-00-218-3778 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 4320-00-218-3778 contain precious materials?

Precious metal content is unknown

Does NSN 4320-00-218-3778 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 4320-00-218-3778 was assigned to the Federal Catalog?

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