AN4-21
Aeronautical Standard Machine Bolt
length: 2-5/32", grip: 1-11/16", thread: 1/4-28, cadmium plated steel, drilled shank, airframe, AN4 series bolt






AN4-21 Datasheet Features and Specification
Quick Specs
Thread Size | 1/4 |
Thread Qty | 28 |
Thread Series | UNF |
Thread Class | 3A |
Material | Steel |
Additional Information
SKU / Model: | AN421 |
NSN: | 5306-00-151-1004 |
FSC: | Bolts / 5306 |
Product Series: | AN4 |
Pack Weight (Approx.) | 0.869 lb |
Minimum Qty (MOQ): | 25 |
ECCN: | EAR99 |
National Motor Freight: | 093486, Bolts,nuts Or Screws, Noi (sub 3) |
Download PDF Version AN4-21_Military-Fasteners-com.pdf |
|
![]() ![]() |
* report an issue on this page
More AN4 machine bolts
$1.02 Each, airframe bolt 1/4-28 Thread, 7/16in. Grip, 29/32in. Length drilled head undrilled shank
Length: 29/32in., grip: 7/16in., thread: 1/4-28, cadmium plated steel drilled shank, drilled head
Length: 25/32in., grip: 5/16in., thread: 1/4-28, cadmium plated steel undrilled shank drilled head
Fastener Length: 6-13/16", Hole Diameter: 1/32", Thread: 1/4-28, Thread Length: 33/64"
Fastener Length: 6-", Hole Diameter: 1/32", Thread: 1/4-28, Thread Length: 15/32"
$1.50 Each, Length: 25/32in., grip: 5/16in., thread: 1/4-28, cadmium plated steel drilled shank drilled head
Product Image Gallery
Product code AN4-21





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

I have purchased most of my aviation needs from Military Fasteners for the last 5 years. You have provided me with the products that I have needed,with a price that is fair and a delivery on time. Thanks!
Amazingly prompt response! I ordered over 1000 items and couldn't believe it when there was an email waiting the following morning saying the items had been dispatched. Easy to track the package online. By comparison I ordered some items from another supplier 3 months ago and I'm still waiting, with no apologies or communication emanating from them to explain the delay.
Great Website helped to identify the needed parts. The wide array of shipping options and costs helped minimize unnecessary expense. Parts arrived promptly. Thankyou
I have always turned to Military Fasteners for all my aviation needs. They have never let me down and are totally trustworthy, fast and efficient. They have great choices from reasonably priced, to the best available. I've never seen the need to look anywhere else..Why would I..
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.