Packaged Items
SinglePack of 5
Dash No.Nominal


Hex head aircraft bolts are made of high-strength type 4037 or 8740 alloy steel (type 8740 is most commonly used). The bolts are centerless ground and threaded after heat treatment. Minimum tensile strength 125,000 PSI. Cadmium plated per specification QQ-P-416A, Type II, Class 3. Available with shank drilled for cotter pin or undrilled for stop nut application, and with or without drilled head for safety wire. Specify bolts to have undrilled shank by adding letter "A" after the dash number. For bolts with drilled head add letter "H" after the AN number. See illustrated examples. "C" represents Type 431 Stainless Steel (contains iron which is magnetic). The length of AN aircraft bolts is measured from under the head to the end of the shank. The "grip" is the unthreaded portion of the shank. See table for conversion of length and/or grip to proper AN callout.

15% discount on qty of 50-99
20% discount on qty of 100+

Note: Drilled bolts listed above are drilled shank only. To order drilled head only or both drilled head and shank bolts, please use our AN Bolt Selector by clicking the link below.

Click here for the AN Bolt Selector
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Reference Chart

Reference Chart


No issues

Larry R Verified Purchase


July 5, 2022

great product fast delivery I use these fasteners on racing go karts

Robert K Verified Purchase


April 17, 2022

It’s a bolt. Works good. Lasts a long time

May 4, 2021

Although the bolts came from three different places, in 3 different shipments, they all arrived on time and were all correct. Whatever system you used to pull that off seems to be working.. Thanks,

Erik T
March 17, 2021

Supplied as requested

Dave L
December 14, 2020

Always great service, correct parts and fast shipping. Thanks

Mike M
December 14, 2020


Mike L
October 21, 2020

Very good quality bolts from Aircraft Spruce

September 12, 2020

Great service on a great a product line.

Leon R
August 4, 2020

Bolt was as advertised and is working great.

Edgar K
June 22, 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: What are the quantities for price breaks and the standard package quantities? I know you'll send any quantity, but I'd order above the price breaks and in multiples of the package quantities if they were listed.

The discount schedule for large quantities are: 50-100 = 15% / 100+ = 20%. Package quantities are usually 25 but we can sort them however you prefer as long as you mention it in special instructions at checkout.

Q: How do I order AN4 bolts with the head drilled on line?

Use the AN Bolt Selector page. Keyword search "AN Bolt Selector" on our website and click the first result, then use the drop down selections on the page to choose the bolts you need.

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