6661522-18

View detailed technical data, stock status, and sourcing information for: 6661522-18
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-00-113-6681

Item Name Code

15936

Assigment Date

09/20/1968 (57 years ago)

A washer, round in shape, and having a centrally located hole. Its two flat parallel bearing surfaces are divided or cut along the radius, leaving a cleft, fissure, or cutaway portion across the rim which extends from the outer circumference to the washer hole and is always as large as, or larger than the diameter of the hole.

0.253 inches minimum and 0.258 inches maximum hole diameter, 0.495 inches minimum and 0.498 inches maximum outside diameter, 79.4 rockwell superficial 15-n minimum and 83.5 rockwell superficial 15-n maximum hardness rating, 32.0 microinches bottom surface finish, 0.0785 inches minimum and 0.0789 inches maximum material thickness

Product Characteristics

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

Hole Diameter: 0.253 inches minimum and 0.258 inches maximum
Outside Diameter: 0.495 inches minimum and 0.498 inches maximum
Material Thickness: 0.0785 inches minimum and 0.0789 inches maximum
Hardness Rating: 79.4 rockwell superficial 15-n minimum and 83.5 rockwell superficial 15-n maximum
Surface Finish: 32.0 microinches bottom
Surface Finish: 32.0 microinches top
Heat Treatment: annealed
Material: steel comp 410 overall
Material Document And Classification: qq-s-763 fed spec single material response overall
Surface Treatment: passivate overall
Surface Treatment Document And Classification: pr100 fscm 09523 mfr ref single treatment response overall
Style Designator: slotted

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
6661522-18	Slotted Washer

FAQs

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

What is the FSCG of the NSN 5310-00-113-6681?

The FSCG of the NSN 5310-00-113-6681 is 5310

Does the NSN 5310-00-113-6681 have a Schedule B code assigned?

Yes, the Schedule B code is 7318220000

Does NSN 5310-00-113-6681 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 5310-00-113-6681 contain precious materials?

Precious metal content is unknown

Does NSN 5310-00-113-6681 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 5310-00-113-6681 was assigned to the Federal Catalog?

It was assigned 57 years ago, on Fri, Sep 20, 1968