5310-01-121-8526

Find complete technical information, availability, and procurement data for: 5310-01-121-8526
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-01-121-8526

Item Name Code

15933

Assigment Date

11/10/1981 (44 years ago)

A washer, round in shape, and having a centrally located hole. One bearing surface is flat and unbroken, the other surface is in the form of a raised shoulder (boss) having a flat bearing surface. The thickness of the shoulder (boss) must not exceed 25 percent of the shoulder (boss) diameter. For items having a shoulder (boss) of greater thickness, use bearing, sleeve; bushing sleeve; or spacer, sleeve. Excludes:insulator, washer and thrust type washers.

39.0 rockwell c minimum and 45.0 rockwell c maximum hardness rating, 0.191 inches minimum and 0.195 inches maximum hole diameter, 0.067 inches minimum and 0.069 inches maximum material thickness, 0.280 inches minimum and 0.290 inches maximum recess diameter, 0.377 inches minimum and 0.387 inches maximum outside diameter

Product Characteristics

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

Hole Diameter: 0.191 inches minimum and 0.195 inches maximum
Outside Diameter: 0.377 inches minimum and 0.387 inches maximum
Recess Diameter: 0.280 inches minimum and 0.290 inches maximum
Material Thickness: 0.067 inches minimum and 0.069 inches maximum
Hardness Rating: 39.0 rockwell c minimum and 45.0 rockwell c maximum
Recess Angle: 90.0 degrees nominal
Material: steel comp 4130 overall
Material Document And Classification: mil-s-6758 mil spec single material response or mil-s-18729 mil spec single 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: 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
10109387	Recessed Washer
721009663500	Recessed Washer
MS21299-C3	Recessed Washer
MS21299C3	Recessed Washer

FAQs

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

What is the FSCG of the NSN 5310-01-121-8526?

The FSCG of the NSN 5310-01-121-8526 is 5310

Does the NSN 5310-01-121-8526 have a Schedule B code assigned?

Yes, the Schedule B code is 7318220000

Does NSN 5310-01-121-8526 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 5310-01-121-8526 contain precious materials?

Item does not contain precious metal.

Does NSN 5310-01-121-8526 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 5310-01-121-8526 was assigned to the Federal Catalog?

It was assigned 44 years ago, on Tue, Nov 10, 1981