Packaged Items
SinglePack of 100
AN No.Superseding NAS No.Bolt / Screw SizeO.D. (in.)I.D. (in.)Thickness
AN960- 6LNAS1149FN616PNo. 60.3750.1490.016


AN960 flat washers are used under hex nuts to provide a smooth bearing surface, as shims to obtain the correct grip length for a bolt and nut assembly, and to adjust the position of AN310 and AN320 castle nuts with respect to drilled cotter pin holes in bolts and clevis pins. Available in regular and light thickness.

Light Series Washers:
Add the letter "L" to dash number to indicate light series. AN960-416L is a light series cadmium plated steel washer for 1/4" dia. bolt.

Light series washers must be manually input on order form.

Less 20% for quantity 100/Part No.
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Reference Chart

Reference Chart

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Richard H Verified Purchase


June 15, 2024

Great product as we are used to with Spruce. Thanks.

May 18, 2021

I intend to use these washers in a Live Steam hobby project. I plan to use two per Screw- but set in joining one inch high Steel rail sections toghether, with four fasteners per joint.

William S
April 20, 2021

These washers changed my life....

Rob P
December 29, 2020

Packing and delivery was excellent. Product was the same . Will buy these from you again. Same with all the sizes I purchased. It is really nice to receive great customer service. Thanks

Mike H
December 14, 2020

they arrived quickly, sooner than I expected. Thanks

Colette M
December 9, 2020

great quality

Mathis B
November 20, 2020


Mike L
October 21, 2020

Nice product fast shipping

Glen F
September 30, 2020

Availability and fast delivery were excellent.

Jimroy M
September 17, 2020


Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

Q: Are there any bulk quantity discounts available with the AN960 flat washers?

Yes, we offer 20% discount on orders over 100 per line item. These prices are built into the website. Once you reach 100+ units you will see the 20% discount applied.

Q: What P/N washer do I need for AN3 bolts?

AN3 bolts would require AN960-10 washers. Please see the reference chart tab for additional size information.

Q: What size washer for AN4 bolts?

-416 for the AN4 bolts.

Q: Are these available in stainless steel C variations?

Yes, but not all sizes. For example, for the -10 (fits AN3 bolts), you would use AN960C10.