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Airframe Bolt, Drilled AN4-21

Description:

Length: 2-5/32", grip: 1-11/16", thread: 1/4-28, cadmium plated steel, drilled shank

AN4-21 Details

National Stock Number (NSN) 5306-00-151-1004
Alternate Part Number N/A
Federal Supply Class (FSC) 5306
Unit of Measure (UOM) 20 /Ea.
Thread Class 3a
Thread Direction Right-hand
Thread Length Between 0.438 inches and 0.516 inches
Fastener Length Between 2.141 inches and 2.188 inches
Head Style Hexagon
Head Height Between 0.140 inches and 0.172 inches
Width Between Flats Between 0.428 inches and 0.440 inches
Shank Unthreaded Hole Diameter 0.076 inches first hole and 0.086 inches first hole
Thread Diameter 0.250 inches
Grip Length Between 1.672 inches and 1.703 inches
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 and 32.0 rockwell c
Distance From Head Largest Bearing Surface To Shank Hole Center 1.984 inches first hole and 2.016 inches first hole
Material Steel comp 4140 or steel comp 8740 or steel comp 8630 or steel comp 8735 or steel comp 4130 or steel comp 4037
Material Specification Mil-s-5626 military specification 1st material response or mil-s-6049 military specification 2nd material response or mil-s-6050 military specification 3rd material response or mil-s-6098 military specification 4th material response or mil-s-6758 military specification 5th material response or ams 6300 assn standard 6th material response
Surface Treatment Cadmium and chromate
Surface Treatment Specification Qq-p-416 type 2 cl 3 federal specification all treatment responses
Thread Series Designator Unf

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