5310-01-391-7138

Find complete technical information, availability, and procurement data for: 5310-01-391-7138
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-01-391-7138

Item Name Code

13393

Assigment Date

06/16/1994 (32 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.

rectangular cross-sectional shape style, 0.443 inches minimum and 0.463 inches maximum hole diameter, round center hole shape style, 0.059 inches minimum and 0.067 inches maximum thickness, round peripheral 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: 0.443 inches minimum and 0.463 inches maximum
Peripheral Shape Style: round
Center Hole Shape Style: round
Thickness: 0.059 inches minimum and 0.067 inches maximum
Overall Diameter: 0.745 inches minimum and 0.770 inches maximum
Material: steel overall

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
5310-00-595-6029	Flat Washer	07/01/2025

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
510-769-00	Flat Washer
NAS1149F0763P	Flat Washer

FAQs

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

What is the FSCG of the NSN 5310-01-391-7138?

The FSCG of the NSN 5310-01-391-7138 is 5310

Does the NSN 5310-01-391-7138 have a Schedule B code assigned?

Yes, the Schedule B code is 7318220000

Does NSN 5310-01-391-7138 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 5310-01-391-7138 contain precious materials?

Item does not contain precious metal.

Does NSN 5310-01-391-7138 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 5310-01-391-7138 was assigned to the Federal Catalog?

It was assigned 32 years ago, on Thu, Jun 16, 1994