AN4C21A

Aeronautical Standard Machine Bolt

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Description:

length: 2-5/32", grip: 1-11/16", thread: 1/4-28 - corrosion resistant steel - undrilled shank

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AN4C21A Datasheet Features and Specification

Thread Class:
3a
Thread Direction:
Right-hand
Thread Length:
0.468 inches minimum
Fastener Length:
2.156 inches nominal
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:
1.688 inches nominal
Features Provided:
Finished head
Thready Qty Per Inch (tpi):
28
Min. Tensile Strength (psi):
125000 pounds per square inch
Material:
Steel corrosion resisting overall
Material Specification:
Qq-s-770 fed spec single material response overall
Surface Treatment:
Passivate overall
Thread Series Designator:
Unf
Quick Specs
Thread Size 1/4
Thread Qty 28
Material Stainless Steel
Length 2-1/8

Additional Information

SKU / Model: AN4C21A
NSN: 5306-00-156-2349
FSC: Bolts / 5306
Pack Weight (Approx.) 0.000 lb
Minimum Qty (MOQ): 10
National Motor Freight: 093486, Bolts,nuts Or Screws, Noi (sub 3)
Download PDF Version
AN4C21A_Military-Fasteners-com.pdf
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Very pleased with my order. Everything in my order was exactly what I had ordered and the price was fair. Delivered within two days of placing order.

5.0

Easy to navigate website, great prices and speedy delivery. I was very happy with the service.

5.0

Ive been buying aircraft parts and supplies from Military Fasteners for 3 years as Ive built four different homebuilt aircraft. I have ALWAYS been perfectly satisfied with all facets of the process. Parts are almost always shipped the same day as I order them, even if I order in the afternoon. Im usually always able to find what i need on the website, and if not, I can call and be helped by someone who knows what he or she is doing. Your people make me feel like they really care about me. Prices are fair. I wish I could run my company as well as you run yours!

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I called the customer service line just before Air Venture at Oshkosh to find out if they would have the parts I needed at their booth. The service rep on the phone was very helpful and was able to check the inventory that was taken to Oshkosh.I was told that the parts would not be available but could be shipped from the warehouse without delay. I ordered a full set of intake seals for a Continental 085 on the spot and they arrived in a few days. I am very happy with the service provided, and will be ordering more parts soon! Thank you Larry

5.0