5310-01-321-8611

Find complete technical information, availability, and procurement data for: 5310-01-321-8611
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-01-321-8611

Item Name Code

15930

Assigment Date

06/23/1990 (36 years ago)

A washer which is round with a centrally located hole. One bearing surface is smooth, flat, and unbroken, the other bearing surface is smooth, unbroken, and is recessed to form a curved or spherical contour. See also washer (1), convex. Excludes:washer (1), recessed and bearing, washer, thrust.

0.531 inches minimum and 0.537 inches maximum hole diameter, 0.780 inches minimum and 0.790 inches maximum outside diameter, 0.099 inches nominal recess depth, 0.170 inches minimum and 0.180 inches maximum material thickness, 0.435 inches minimum and 0.440 inches maximum radius

Product Characteristics

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

Hole Diameter: 0.531 inches minimum and 0.537 inches maximum
Radius: 0.435 inches minimum and 0.440 inches maximum
Outside Diameter: 0.780 inches minimum and 0.790 inches maximum
Recess Depth: 0.099 inches nominal
Material Thickness: 0.170 inches minimum and 0.180 inches maximum
Hardness Rating: 38.0 rockwell c minimum and 44.0 rockwell c maximum
Material: steel comp 8740 or steel comp e4340 overall
Material Document And Classification: mil-s-6049 mil spec 1st material response or mil-s-5000 mil spec 2nd material response overall
Surface Treatment: cadmium and chromate overall
Surface Treatment Document And Classification: qq-p-416,ty 2,cl 2 fed spec single treatment response overall
Style Designator: concave

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
K52207P6	Concave Washer

FAQs

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

What is the FSCG of the NSN 5310-01-321-8611?

The FSCG of the NSN 5310-01-321-8611 is 5310

Does the NSN 5310-01-321-8611 have a Schedule B code assigned?

Yes, the Schedule B code is 7318220000

Does NSN 5310-01-321-8611 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 5310-01-321-8611 contain precious materials?

Item does not contain precious metal.

Does NSN 5310-01-321-8611 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 5310-01-321-8611 was assigned to the Federal Catalog?

It was assigned 36 years ago, on Sat, Jun 23, 1990