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Home / Hardware / Bolts /AN4 Bolts 1/4-28
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AN4 Bolts 1/4-28

261 Reviews 2 Answered Questions
From $0.34 to $34.50
Reference Chart

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Dash No. Nominal
Length		 Grip
Length		 AN4 Cad Plated
Drilled		 AN4 Cad Plated
Undrilled		 AN4C Stainless
Drilled		 AN4C Stainless
Undrilled
-315/321/16$0.97
Quantity
$0.34
Quantity
$11.95
Quantity
$3.35
Quantity
-417/321/8$1.27
Quantity
$0.37
Quantity
$1.75
Quantity
$1.18
Quantity
-521/323/16$0.83
Quantity
$0.45
Quantity
$1.69
Quantity
$1.38
Quantity
-625/325/16$1.32
Quantity
$0.48
Quantity
$2.56
Quantity
$2.41
Quantity
-729/327/16$1.44
Quantity
$0.43
Quantity
$2.06
Quantity
$1.60
Quantity
-101-1/329/16$1.04
Quantity
$0.54
Quantity
$5.85
Quantity
$1.64
Quantity
-111-5/3211/16$1.98
Quantity
$0.68
Quantity
$3.35
Quantity
$2.93
Quantity
-121-9/3213/16$1.47
Quantity
$0.74
Quantity
$3.35
Quantity
$3.75
Quantity
-131-13/3215/16$1.35
Quantity
$0.66
Quantity
$2.44
Quantity
$2.45
Quantity
-141-17/321-1/16$1.89
Quantity
$0.68
Quantity
$2.82
Quantity
$3.40
Quantity
-151-21/321-3/16$1.50
Quantity
$0.78
Quantity
$2.85
Quantity
$2.30
Quantity
-161-25/321-5/16$1.37
Quantity
$0.91
Quantity
--$3.60
Quantity
-171-29/321-7/16$1.53
Quantity
$0.97
Quantity
$8.50
Quantity
$2.79
Quantity
-202-1/321-9/16$1.84
Quantity
$1.34
Quantity
$4.35
Quantity
$1.84
Quantity
-212-5/321-11/16$1.46
Quantity
$0.92
Quantity
--$5.60
Quantity
-222-9/321-13/16$1.76
Quantity
$1.23
Quantity
--$2.35
Quantity
-232-13/321-15/16$1.98
Quantity
$1.11
Quantity
--$4.50
Quantity
-242-17/322-1/16$1.66
Quantity
$1.12
Quantity
--$4.35
Quantity
-252-21/322-3/16$3.35
Quantity
$1.23
Quantity
--$10.50
Quantity
-262-25/322-5/16$2.76
Quantity
$1.26
Quantity
--$4.35
Quantity
-272-29/322-7/16$1.81
Quantity
$1.29
Quantity
--$5.75
Quantity
-303-1/322-9/16$1.98
Quantity
$1.38
Quantity
--$5.70
Quantity
-313-5/322-11/16$3.35
Quantity
$1.38
Quantity
----
-323-9/322-13/16$1.75
Quantity
$1.46
Quantity
----
-333-13/322-15/16$2.18
Quantity
$1.35
Quantity
----
-343-17/323-1/16$2.27
Quantity
$1.52
Quantity
----
-353-21/323-3/16$2.07
Quantity
$1.50
Quantity
----
-363-25/323-5/16$2.97
Quantity
$1.44
Quantity
----
-373-29/323-7/16$2.28
Quantity
$2.07
Quantity
----
-404-1/323-9/16$2.77
Quantity
$2.21
Quantity
----
-414-5/323-11/16$2.88
Quantity
$2.42
Quantity
----
-424-9/323-13/16$2.96
Quantity
$3.35
Quantity
----
-434-13/323-15/16$3.35
Quantity
$4.35
Quantity
----
-444-17/324-1/16$2.85
Quantity
$2.25
Quantity
----
-454-21/324-3/16$3.75
Quantity
$2.38
Quantity
----
-464-25/324-5/16$3.35
Quantity
$2.62
Quantity
----
-474-29/324-7/16$3.35
Quantity
$2.84
Quantity
----
-505-1/324-9/16$8.50
Quantity
$8.50
Quantity
----
-515-5/324-11/16$12.99
Quantity
$7.50
Quantity
----
-525-9/324-13/16$14.50
Quantity
$8.95
Quantity
----
-535-13/324-15/16--$10.50
Quantity
----
-545-17/325-1/16--$15.50
Quantity
----
-555-21/325-3/16$14.95
Quantity
$13.80
Quantity
----
-565-25/325-5/16$14.50
Quantity
$20.70
Quantity
----
-575-29/325-7/16$15.50
Quantity
$28.50
Quantity
----
-606-1/325-9/16$14.85
Quantity
$33.50
Quantity
----
-616-5/325-11/16--$14.55
Quantity
----
-626-9/325-13/16--$17.60
Quantity
----
-646-1/26-1/16$19.50
Quantity
$32.99
Quantity
----
-666-25/326-5/16--$21.50
Quantity
----
-727-9/326-13/16--$34.50
Quantity
----
Subtotal $0.00
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Overview

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

Reference Chart

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Reviews

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Just the right grip length needed!

John L Verified Purchase

Bolt Undrilled AN4-20A
December 12, 2024

Brian R Verified Purchase

Bolt Undrilled AN4-30A
November 23, 2024

great.

Paul C Verified Purchase

Bolt Undrilled AN4-27A
October 10, 2024

Good quality and view.

Julian S Verified Purchase

Bolt Undrilled AN4-11A
September 27, 2024

Good quality and view.

Julian S Verified Purchase

Bolt Drilled AN4-17
September 27, 2024

Good quality and view.

Julian S Verified Purchase

Bolt Drilled AN4-7
September 27, 2024

Good quality and view.

Julian S Verified Purchase

Bolt Drilled AN4-20
September 27, 2024

All bolts are of good quality,received the correct numbers,shipped in a timely manor

William L Verified Purchase

Bolt Drilled AN4-25
September 24, 2024

Works as advertised

Ed C Verified Purchase

Bolt Undrilled AN4-60A
September 16, 2024

Andrew W Verified Purchase

Bolt Undrilled AN4-27A
September 9, 2024

Q&A

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Please note, Aircraft Spruce Canada'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 Canada 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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