AN4DD21A

Aeronautical Standard Machine Bolt

email this to someone  
Description:

Fastener Length: 2-9/64", Thread: 1/4-28, Thread Length: 7/16

* Manufacturer certifications are shipped with your order FREE of charge
no image available
Add to Quote We are currently out of stock of this item. Click the button below to add this item to a quote and receive up to date pricing and availability by email.

Add to Quote

AN4DD21A Datasheet Features and Specification

Thread Class:
3a
Thread Direction:
Right-hand
Thread Length:
0.438 inches minimum and 0.516 inches maximum
Fastener Length:
2.141 inches minimum and 2.188 inches maximum
Head Style:
Hexagon
Head Height:
0.140 inches minimum and 0.172 inches maximum
Width Between Flats:
0.428 inches minimum and 0.440 inches maximum
Thread Diameter:
0.250 inches
Grip Length:
1.672 inches minimum and 1.703 inches maximum
Features Provided:
Finished head
Thready Qty Per Inch (tpi):
28
Min. Tensile Strength (psi):
62000 pounds per square inch
Material:
Aluminum alloy overall
Material Specification:
Qq-a-200 fed spec single material response overall or qq-a-225 fed spec single material response overall or qq-a-430 fed spec single material response overall
Surface Treatment:
Oxide film overall and anodize overall
Surface Treatment Specification:
Mil-c-5541 mil spec 1st treatment response overall and mil-a-8625 mil spec 2nd treatment response overall
Thread Series Designator:
Unf
Quick Specs
Thread Size 1/4
Thread Qty 28
Material Aluminum
Length 2-3/16

Additional Information

SKU / Model: AN4DD21A
NSN: 5306-00-151-1444
FSC: Bolts / 5306
Product Series: AN4DD
Pack Weight (Approx.) 0.000 lb
Minimum Qty (MOQ): 10
ECCN: EAR99
National Motor Freight: 013280, Alum Bolts
Download PDF Version
AN4DD21A_Military-Fasteners-com.pdf
Worldwide Shipping

* report an issue on this page

More AN4DD machine bolts

AN4DDH7A

Fastener Length: 29/32", Hole Diameter: 5/64", Thread: 1/4-28, Thread Length: 15/32"

AN4DDH6A

Machine Bolt 5306-00-275-9644, Fastener Length: 25/32in., Hole Diameter: 3/64in., Thread: 1/4-28, Thread Length: 15/32in.

AN4DDH5A

Fastener Length: 21/32", Hole Diameter: 3/64", Thread: 1/4-28, Thread Length: 15/32"

AN4DDH21A

$8.34 EA, Fastener Length: 2-5/32in., Hole Diameter: 3/64in., Thread: 1/4-28, Thread Length: 15/32in.

AN4DDH15A

Fastener Length: 1-21/32", Hole Diameter: 3/64", Thread: 1/4-28, Thread Length: 15/32"

AN4DDH11A

Fastener Length: 1-5/32", Hole Diameter: 3/64", Thread: 1/4-28, Thread Length: 15/32"

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

Google View our Google profile

Excellent service, parts arrived at my home in UK exactly when you said they would even when you did not have parts in stock when ordered, very prompt reply to my queries before ordering, faster delivery than I would have got from UK.

5.0

Your staff is courteous and well informed about your product line. Your inventory is excellent and competitively priced. The shipment always arrives as advertized and the boxes are well packed. I will continue to order my aircraft supplies from military fasteners

4.0

If your looking for a company that can provide you with technical help on a product that they sold you, this is not the place to buy anything. But they will tell you how sorry they are.

5.0

Trisha Hawkins is extremely helpful and answered every question I had thoroughly. I appreciate her great help in a stressful situation to obtain hardware ASAP.

5.0