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Home / Hardware / Nuts / Castle Nuts /AN310 Castle Nuts
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AN310 Castle Nuts

97 Reviews 2 Answered Questions
From $1.30 to $29.50
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Type Part No. Thread Size Cotter Pin Size Price Buy
Cad Plated
AN310-3
10-32AN380-2-2$1.30
Quantity
Cad Plated
AN310-4
1/4-28$1.55
Quantity
Cad Plated
AN310-5
5/16-24$1.85
Quantity
Cad Plated
AN310-6
3/8-24AN380-3-3$2.30
Quantity
Cad Plated
AN310-7
7/16-20$2.93
Quantity
Cad Plated
AN310-8
1/2-20$4.90
Quantity
Cad Plated
AN310-9
9/16-18AN380-4-4$12.55
Quantity
Cad Plated
AN310-10
5/8-18$4.70
Quantity
Cad Plated
AN310-12
3/4-16AN380-4-5$4.43
Quantity
Cad Plated
AN310-16
1-25/32$29.50
Quantity
Stainless Steel
AN310C3
10-32AN380-2-2$1.70
Quantity
Stainless Steel
AN310C4
1/4-28$2.38
Quantity
Stainless Steel
AN310C5
5/16-24$1.84
Quantity
Stainless Steel
AN310C6
3/8-24AN380-3-3$2.60
Quantity
Stainless Steel
AN310C7
7/16-20$4.35
Quantity
Stainless Steel
AN310C8
1/2-20$9.50
Quantity
Subtotal $0.00
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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.

Less 20% for quantity 100/Part No.

Similar Items

Click Here for AN320 Shear Nuts

Reference Chart

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Reviews

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Its a AN nut. Priced right

Abbas N Verified Purchase

NUT, CASTLE AN310-4
April 16, 2024

Lawrence O Verified Purchase

NUT, CASTLE AN310-5
March 10, 2024

Ward A Verified Purchase

NUT, CASTLE AN310-4
February 28, 2024

Prasook L Verified Purchase

NUT, CASTLE AN310-5
February 21, 2024

Glenn M Verified Purchase

NUT, CASTLE AN310-6
January 18, 2024

ok

Glenn M Verified Purchase

NUT, CASTLE AN310-6
January 18, 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

SS CASTLE NUT # AN310C3
January 10, 2024

Great for exhaust systems. Dont forget the MS24665-151 SS cotter pins!

Gelston A Verified Purchase

SS CASTLE NUT # AN310C4
January 10, 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

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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