A4263

View detailed technical data, stock status, and sourcing information for: A4263
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-00-819-8794

Item Name Code

13393

Assigment Date

01/01/1962 (64 years ago)

A circular-shaped item designed to maintain predetermined distance between assembled parts and/or for distributing pressure or preventing endwise movement between member parts. It has a solid cross-section and two flat parallel bearing surfaces. The distance between the bearing surfaces perpendicular to the axis of the centrally located hole shall not exceed 25 percent of the outside diameter. The diameter of the centrally located hole must exceed 75 percent of the outside diameter. Excludes:laminated items. For items manufactured from impregnated graphite or lubricated nonmetallic materials, excluding felt or plastics, see gasket. For items manufactured from lubricated plastics, see bearing, washer, thrust. For items manufactured from lubricated felt, see felt, mechanical, preformed. Excludes:disk, valve; insulator washer; and shim. See also spacer, plate and spacer, sleeve.

0.570 inches nominal hole diameter, 0.029 inches minimum and 0.036 inches maximum thickness, round peripheral shape style, rectangular cross-sectional shape style, round center hole shape style

Product Characteristics

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

Cross-Sectional Shape Style: rectangular
Hole Diameter: 0.570 inches nominal
Peripheral Shape Style: round
Center Hole Shape Style: round
Thickness: 0.029 inches minimum and 0.036 inches maximum
Overall Diameter: 0.688 inches nominal
Surface Finish: 47.0 microinches all surfaces
Material: aluminum alloy 1100 overall
Material Document And Classification: qq-a-250/1 fed spec single material response overall

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
A4263	Flat Washer

FAQs

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

What is the FSCG of the NSN 5310-00-819-8794?

The FSCG of the NSN 5310-00-819-8794 is 5310

Does the NSN 5310-00-819-8794 have a Schedule B code assigned?

Yes, the Schedule B code is 7616108000

Does NSN 5310-00-819-8794 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 5310-00-819-8794 contain precious materials?

Precious metal content is unknown

Does NSN 5310-00-819-8794 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 5310-00-819-8794 was assigned to the Federal Catalog?

It was assigned 64 years ago, on Mon, Jan 1, 1962