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






AN4-21A 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: | AN421A |
NSN: | 5306-00-151-1415 |
FSC: | Bolts / 5306 |
Product Series: | AN4 |
Pack Weight (Approx.) | 1.770 lb |
Minimum Qty (MOQ): | 50 |
ECCN: | EAR99 |
National Motor Freight: | 093486, Bolts,nuts Or Screws, Noi (sub 3) |
Download PDF Version AN4-21A_Military-Fasteners-com.pdf |
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Frequently bought together
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AN4-20A
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AN4-6A
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AN4-24A
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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
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Product code AN4-21A





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In dealing with Military Fasteners for 3 plus years, I can honestly say Ive never had a bad experience with the company. Please keep up the great work and youll keep me coming back for as long as I am flying.
In this day and age, it is rare to be impressed by customer service however, Military Fasteners has far exceeded my expectations. They went above and beyond to help ensure an important package delivery on time, and they made a little boys Christmas sweeter in the process. Thank you to the team there for your wonderful help. I will certainly come back to shop again and again. They always say, fly people are the best people.
Very fast delivery and always getting what I ordered. Never had an issue with the few returns I've had. They have been very friendly and helpful.
I've been buying from Military Fasteners for about 2 years. In that time, I don't ever recall having a bad experience. Please keep up the great work and continue offering the fair prices, fast shipping and excellent customer service.
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