521987-62

View detailed technical data, stock status, and sourcing information for: 521987-62
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-00-662-3338

Item Name Code

15933

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.

0.025 inches minimum and 0.035 inches maximum recess depth, 0.720 inches minimum and 0.742 inches maximum recess diameter, 0.670 inches minimum and 0.672 inches maximum hole diameter, 0.810 inches nominal outside diameter, 0.061 inches minimum and 0.063 inches maximum overall height

Product Characteristics

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

Hole Diameter: 0.670 inches minimum and 0.672 inches maximum
Outside Diameter: 0.810 inches nominal
Overall Height: 0.061 inches minimum and 0.063 inches maximum
Recess Diameter: 0.720 inches minimum and 0.742 inches maximum
Recess Depth: 0.025 inches minimum and 0.035 inches maximum
Material Thickness: 0.061 inches minimum and 0.063 inches maximum
Recess Angle: 90.0 degrees nominal
Heat Treatment: as fabricated
Material: steel overall
Material Document And Classification: ams 5062 assn std single material 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
521987-62	Recessed Washer

FAQs

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

What is the FSCG of the NSN 5310-00-662-3338?

The FSCG of the NSN 5310-00-662-3338 is 5310

Does the NSN 5310-00-662-3338 have a Schedule B code assigned?

Yes, the Schedule B code is 7318220000

Does NSN 5310-00-662-3338 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 5310-00-662-3338 contain precious materials?

Precious metal content is unknown

Does NSN 5310-00-662-3338 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 5310-00-662-3338 was assigned to the Federal Catalog?

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