5310-00-821-7520

Find complete technical information, availability, and procurement data for: 5310-00-821-7520
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-00-821-7520

Item Name Code

29729

Assigment Date

01/01/1962 (64 years ago)

0.740 inches maximum washer outside diameter, soluble lubricant lubrication, prevailing torque all metal design locking feature, 3b thread class, right-hand thread direction

Product Characteristics

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

Thread Class: 3b
Thread Direction: right-hand
Locking Feature: prevailing torque all metal design
Washer Outside Diameter: 0.740 inches maximum
Lubrication: soluble lubricant
Overall Height: 0.497 inches maximum
Nut Style: double hexagon
Washer Thickness: 0.110 inches minimum
Width Across Flats: 0.492 inches minimum and 0.502 inches maximum
Temp Rating: 450.0 fahrenheit nominal
Thread Series: unjf
Thread Quantity Per Inch: 24
Hardness Rating: 27.0 rockwell c minimum and 33.0 rockwell c maximum
Nominal Thread Size: 0.375 inches
Material: steel overall
Surface Treatment: cadmium overall
Surface Treatment Document And Classification: qq-p-416,ty 1,cl 3 fed spec single treatment response overall

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
5310-00-819-7784	No Name Available	01/05/1968

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
EWN22-6	Extended Washer Self-Locking Nut

FAQs

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

What is the FSCG of the NSN 5310-00-821-7520?

The FSCG of the NSN 5310-00-821-7520 is 5310

Does the NSN 5310-00-821-7520 have a Schedule B code assigned?

Yes, the Schedule B code is 7318160000

Does NSN 5310-00-821-7520 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 5310-00-821-7520 contain precious materials?

Precious metal content is unknown

Does NSN 5310-00-821-7520 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 5310-00-821-7520 was assigned to the Federal Catalog?

It was assigned 64 years ago, on Mon, Jan 1, 1962