240840

View detailed technical data, stock status, and sourcing information for: 240840
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-01-254-5420

Item Name Code

15933

Assigment Date

05/07/1987 (39 years ago)

A pliable rubber, felt, leather, or composition ring-shaped element, split or solid; with or without spring or spreader, having a metal shell on all or a portion of at least two of the outer surfaces. It may be designed to be either bolt mounted or pressmounted between fixed and moveable parts to form a tight and effective seal by the pressure of the spring or spreader or the resiliency inherent in the element material. Excludes:packing with retainer.

0.100 inches nominal material thickness, 0.404 inches minimum and 0.412 inches maximum recess diameter, 0.531 inches nominal outside diameter, 0.252 inches minimum and 0.260 inches maximum hole diameter, 0.076 inches nominal recess depth

Product Characteristics

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

Hole Diameter: 0.252 inches minimum and 0.260 inches maximum
Outside Diameter: 0.531 inches nominal
Recess Diameter: 0.404 inches minimum and 0.412 inches maximum
Recess Depth: 0.076 inches nominal
Material Thickness: 0.100 inches nominal
Recess Angle: 90.0 degrees nominal
Material: steel comp 321 or steel comp 347 overall
Material Document And Classification: qq-s-763,cond a fed spec all material responses overall
Surface Treatment: passivate overall
Surface Treatment Document And Classification: qq-p-35,type 2 fed spec single treatment response overall
Style Designator: recessed

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
240840	Recessed Washer

FAQs

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

What is the FSCG of the NSN 5310-01-254-5420?

The FSCG of the NSN 5310-01-254-5420 is 5310

Does the NSN 5310-01-254-5420 have a Schedule B code assigned?

Yes, the Schedule B code is 7318220000

Does NSN 5310-01-254-5420 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 5310-01-254-5420 contain precious materials?

Item does not contain precious metal.

Does NSN 5310-01-254-5420 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 5310-01-254-5420 was assigned to the Federal Catalog?

It was assigned 39 years ago, on Thu, May 7, 1987