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

108 Reviews 2 Answered Questions
From $1.55 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$1.84
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$6.50
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$2.95
Quantity
Stainless Steel
AN310C6
3/8-24AN380-3-3$2.60
Quantity
Stainless Steel
AN310C7
7/16-20$4.40
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.
   
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Reviews

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David D Verified Purchase

Nut, Castle AN310-3
October 24, 2024

Ok this is the only stainless steel item I received

Abbas N Verified Purchase

Stainless Steel Castle Nut # AN310C3
October 19, 2024

The nut that I finally received was fine. Unfortunately, the first shipment included an AN310-4 nut. AS immediately replaced it as soon as I told them and I got the AN310-5 that I needed.

Richard T Verified Purchase

Nut, Castle AN310-5
October 3, 2024

Good quality and view.

Julian S Verified Purchase

Nut, Castle AN310-4
September 27, 2024

Good quality and view.

Julian S Verified Purchase

Nut, Castle AN310-3
September 27, 2024

Good quality and view.

Julian S Verified Purchase

Nut, Castle AN310-5
September 27, 2024

Andrew W Verified Purchase

Nut, Castle AN310-3
September 9, 2024

Gunnlaugur K Verified Purchase

Nut, Castle AN310-4
September 2, 2024

Jk A Verified Purchase

Nut, Castle AN310-6
August 3, 2024

Michael W Verified Purchase

Nut, Castle AN310-8
June 26, 2024

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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