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Home / Hardware / Nuts / Castle Nuts /Nut, Castle AN310-3
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Nut, Castle AN310-3

43 Reviews 2 Answered Questions
Packaged Items
SinglePack of 50
Quantity
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TypePart No.Thread SizeCotter Pin Size
Cad PlatedAN310-310-32AN380-2-2

Overview

Fabricated from steel and cadmium plated per QQ-P-416A, Type II, Class 3. AN310 castle nuts are used with drilled-shank bolts, clevis bolts, eye bolts and studs. The slots in the nut accommodate a cotter pin for safety purposes. The thinner AN320 castellated shear nut, with half the tensile rating of the AN310 nut, is used with clevis bolts and threaded taper pins which are subject to shearing stress only.

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Reviews

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David D Verified Purchase

Nut, Castle AN310-3
October 24, 2024

Good quality and view.

Julian S Verified Purchase

Nut, Castle AN310-3
September 27, 2024

Andrew W Verified Purchase

Nut, Castle AN310-3
September 9, 2024

Michael B Verified Purchase

Nut, Castle AN310-3
June 2, 2024

Lindsay A Verified Purchase

Nut, Castle AN310-3
December 2, 2023

I have to say… these product-review requests are getting ridiculous. It’s an AN3 (10-32) castle nut for goodness sake! For those of you with metal teeth these would make a good substitute for raisins in your morning bowl of oatmeal. Tasty!

Charles N Verified Purchase

Nut, Castle AN310-3
November 28, 2023

Direct fit for the 172

Keith W Verified Purchase

Nut, Castle AN310-3
November 14, 2023

White B Verified Purchase

Nut, Castle AN310-3
November 10, 2023

Tom M Verified Purchase

Nut, Castle AN310-3
October 27, 2023

Richard M Verified Purchase

Nut, Castle AN310-3
May 25, 2023

Q&A

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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 these castle nuts unified national fine thread?

Yes, they are standard AN UNF thread.

Q: What are the hex sizes and height for the AN310-6 and 310-8 castle nuts?

AN310-6 would use a 9/16 wrench and is 13/32 tall

An310-8 would use a 3/4 wrench and is 9/16 tall.

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