AN4C21

Aeronautical Standard Machine Bolt

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Description:

Fastener Length: 2-3/16", Thread: 1/4-28, Thread Length: 33/64

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AN4C21 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
Grip Diameter:
0.246 inches minimum and 0.249 inches maximum
Shank Unthreaded Hole Diameter:
0.076 inches minimum first hole and 0.086 inches maximum first hole
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):
125000 pounds per square inch
Hardness Rating:
26.0 rockwell c minimum overall and 32.0 rockwell c maximum overall
Distance From Head Largest Bearing Surface To Shank Hole Center:
1.984 inches minimum first hole and 2.016 inches maximum first hole
Material:
Steel comp 431 overall
Material Specification:
Mil-s-18732 mil spec single material response overall
Surface Treatment:
Passivate overall
Thread Series Designator:
Unf
Quick Specs
Thread Size 1/4
Thread Qty 28
Material Steel
Length 2-3/16

Additional Information

SKU / Model: AN4C21
NSN: 5306-00-156-2278
FSC: Bolts / 5306
Product Series: AN4C
Pack Weight (Approx.) 0.000 lb
Minimum Qty (MOQ): 2
Schedule B: 7318.15.8085
ECCN: EAR99
National Motor Freight: 093486, Bolts,nuts Or Screws, Noi (sub 3)
Download PDF Version
AN4C21_Military-Fasteners-com.pdf
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