AN178-40
Aeronautical Standard Close Tolerance Bolt
Fastener Length: 4-3/32", Thread: 1/2-20, Thread Length: 25/32",

Notice: AN178-40 is currently unavailable for immediate purchase. Click the button below to add this item to the request a quote form and receive an official pricing and availability quote by email.
AN178-40 Datasheet Features and Specification
Quick Specs
Thread Size | 1/2 |
Thread Qty | 20 |
Material | Steel |
Length | 4-3/32 |
Additional Information
SKU / Model: | AN17840 |
NSN: | 5306-00-180-0337 |
FSC: | Bolts / 5306 |
Product Series: | AN178 |
Pack Weight (Approx.) | 0.000 lb |
Minimum Qty (MOQ): | 5 |
Schedule B: | 7318.15.8085 |
ECCN: | EAR99 |
National Motor Freight: | 093486, Bolts,nuts Or Screws, Noi (sub 3) |
Download PDF Version AN178-40_Military-Fasteners-com.pdf |
|
![]() |
* report an issue on this page
More AN178 close tolerance bolts
Fastener Length: 2-63/64in., Hole Diameter: 1/16in., Thread: 1/2-20, Thread Length: 53/64in.
Fastener Length: 2-19/32", Hole Diameter: 1/16", Thread: 1/2-20, Thread Length: 25/32"
Fastener Length: 5-3/4", Thread: 1/2-20, Thread Length: 53/64"
$49.14 Each, Length: 2-27/32in., grip: 2-1/16in., thread: 1/2-20, cadmium plated steel drilled shank
$16.20 Each, Length: 2-11/32in., grip: 1-9/16in., thread: 1/2-20, cadmium plated steel undrilled shank
Fastener Length: 1-1/4", Thread: 1/2-20, Thread Length: 53/64"
Have a question
If you require a quote on this or any product please visit our quote request page »
Browse our frequently asked questions page.
You may contact us by phone at +1 (904) 543-6395 or
email us using our contact form.
Our hours of operation are 8:00am - 6:00pm EST
Customer Reviews

Ordering is simple and my parts are always shipped promptly and arrive well packaged. Military Fasteners is always my go-to store when I need something for my homebuilt project.
Ive been purchasing aircraft parts and hardware from Military Fasteners for over 4 years. That alone should speak volumes. Ive always received excellent customer service and the product quality is unrivaled. When I think of aircraft parts and accessories, Im thinking Military Fasteners. Keep up the excellent work folks! Regards, Ed
Lindsey is our go to person at Military Fasteners. When we need a quote she is the first person we look to. We are very happy with the service and product. Highly recommend to others.
Great service, I run a small GA workshop and I can count on Military Fasteners even though I'm in Australia, its quicker than getting it in Australia most of the time. The web site is great and simple to find the parts needed.
Please complete this form if you're having an issue with ordering this item or this item displays invalid or innacurate information or specifications. We thank you for taking the time to report issues so that we may better serve you.