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Home / Hardware / Nuts / Castle Nuts /Stainless Steel Castle Nut # AN310C3
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Stainless Steel Castle Nut # AN310C3

23 Reviews 2 Answered Questions
Packaged Items
SinglePack of 5
Quantity
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TypePart No.Thread SizeCotter Pin Size
Stainless SteelAN310C310-32AN380-2-2

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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Very nice nutz

Patrick L Verified Purchase

Stainless Steel Castle Nut # AN310C3
December 3, 2024

Ok this is the only stainless steel item I received

Abbas N Verified Purchase

Stainless Steel Castle Nut # AN310C3
October 19, 2024

This is THE nut to use on Mooney exhausts/tail pipe connections. Dont forget the MS24665-151 SS cotter pins!

Gelston A Verified Purchase

Stainless Steel Castle Nut # AN310C3
January 10, 2024

White B Verified Purchase

Stainless Steel Castle Nut # AN310C3
November 17, 2022

White B Verified Purchase

Stainless Steel Castle Nut # AN310C3
November 17, 2022

White B Verified Purchase

Stainless Steel Castle Nut # AN310C3
November 16, 2022

I am building a small scale radial engine. About 8 horsepower. These will be the prop nuts. They look fantastic. Mike Brainerd

Mike B
March 8, 2021

As usual, very fast shipping and well packed, a company I can always rely on.

Malcolm C
March 8, 2020

Perfect

Sport I
November 15, 2019

you are doing great getting everything here at reasonable rates and on time . USPS Priority does great Thanks

Bob B
November 7, 2019

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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