BS-20-10.2-0.8

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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-01-108-7558

Item Name Code

15938

Assigment Date

03/05/1981 (45 years ago)

A bent spring metal washer with a centrally located hole. It is designed to exert pressure axially when assembled in place.

0.402 inches minimum and 0.409 inches maximum hole diameter, 49.0 rockwell c minimum and 51.0 rockwell c maximum hardness rating, 0.779 inches minimum and 0.787 inches maximum outside diameter, 0.031 inches minimum and 0.033 inches maximum material thickness, 0.053 inches nominal 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: 0.402 inches minimum and 0.409 inches maximum
Outside Diameter: 0.779 inches minimum and 0.787 inches maximum
Overall Height: 0.053 inches nominal
Material Thickness: 0.031 inches minimum and 0.033 inches maximum
Hardness Rating: 49.0 rockwell c minimum and 51.0 rockwell c maximum
Material: steel overall
Style Designator: spring tension

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
315SB126-1	Spring Tension Washer
BS-20-10.2-0.8	Spring Tension Washer
BS20-102-08	Spring Tension Washer

FAQs

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

What is the FSCG of the NSN 5310-01-108-7558?

The FSCG of the NSN 5310-01-108-7558 is 5310

Does the NSN 5310-01-108-7558 have a Schedule B code assigned?

Yes, the Schedule B code is 7318210000

Does NSN 5310-01-108-7558 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 5310-01-108-7558 contain precious materials?

Item does not contain precious metal.

Does NSN 5310-01-108-7558 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 5310-01-108-7558 was assigned to the Federal Catalog?

It was assigned 45 years ago, on Thu, Mar 5, 1981