89903

View detailed technical data, stock status, and sourcing information for: 89903
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-00-090-0273

Item Name Code

13393

Assigment Date

01/01/1963 (63 years ago)

A washer having a centrally located hole with a solid or laminated cross-section and two flat parallel bearing surfaces. The hole must be 75 percent or less than the largest dimension and the bearing surface finish is greater than 32 microinch (0.8 micrometer). The thickness cannot exceed 25 percent of the largest outside dimension. When the largest outside dimension is less than 1/4 inch or 6mm, the thickness must be 0.006 inches (0.15mm) or greater and for items 1/4 inch (6mm) or larger, the thickness must be 0.016 inches (0.4mm) or greater. The maximum tolerance is applied to dimensions and used as a determining factor. Items with separable lamination use shim. For items fabricated from ceramic or electrically rated materials by specification or industry standards use insulator (1), washer. Excludes:disk, valve, graphite impregnated and lubricated items.

round center hole shape style, 0.064 inches nominal thickness, round peripheral shape style, 0.275 inches nominal hole diameter, rectangular cross-sectional 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: 0.275 inches nominal
Peripheral Shape Style: round
Center Hole Shape Style: round
Thickness: 0.064 inches nominal
Overall Diameter: 0.620 inches nominal
Hardness Rating: 26.0 rockwell c minimum and 33.0 rockwell c maximum
Material: steel comp 8735 overall
Material Document And Classification: mil-s-6098 mil spec single material response overall

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
5310-00-890-7973	No Name Available	07/01/1986

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
89903	Flat Washer

FAQs

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

What is the FSCG of the NSN 5310-00-090-0273?

The FSCG of the NSN 5310-00-090-0273 is 5310

Does NSN 5310-00-090-0273 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 5310-00-090-0273 contain precious materials?

Item does not contain precious metal.

Does NSN 5310-00-090-0273 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 5310-00-090-0273 was assigned to the Federal Catalog?

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