Machine Bolt - AN3-43A
Machine Bolt - AN3-43A
Machine Bolt - AN4-31
Machine Bolt - AN4-31

AN4-14 - Machine Bolt Hex Head Steel Drilled Shank
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Aeronautical Standard - Machine Bolt - AN4-14
Standard Part

Description: Machine Bolt
Part Number: AN4-14
Alternate Part Numbers: 400 109


Product Overview:

An externally threaded fastener designed for insertion through holes in assembled parts and normally intended to be tightened or released by torquing a nut. the threaded and unthreaded portions are both of one diameter of 0.190 inch (5 mm) or larger. The head is not designed to be held or driven with an inserted driver or by the thumb and fingers. a locking feature may be incorporated in the design of the head or threads. head dimensions and sizes of threaded and unthreaded portions shall conform to internationally recognized fastener standards. for items having a grip length portion machined to a tolerance of 0.0015 inch (0.038 mm) or less, bolt, shear. See also screw, cap, hexagon head and screw, machine.


Item Specification:

Thread Class



Thread Direction


Thread Length

0.469 inches minimum

Fastener Length

1.531 inches nominal

Head Style


Head Height

0.140 inches minimum and 0.172 inches maximum

Width Between Flats

0.428 inches minimum and 0.440 inches maximum

Shank Unthreaded Hole Diameter

0.076 inches nominal first hole

Nominal Thread Diameter

0.250 inches

Grip Length

1.062 inches nominal

Features Provided

Finished head

Thread Quantity per Inch


Minimum Tensile Strength

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

1.374 inches nominal first hole


Steel comp 4037 overall or steel comp 4130 overall or steel comp 8630 overall or steel comp 8735 overall or steel comp 8740 overall or steel comp 4140 overall

Material Document and Classification

MIL-B-6812 mil spec all material responses overall

Surface Treatment

Cadmium overall and chromate overall

Surface Treatment Document and Classification

QQ-P-416, ty 2, class 3 fed spec all treatment responses overall

Thread Series Designator




Fits In:

  1. ·         Bombardier Challenger 601
  2. ·         Bombardier Learjet 55
  3. ·         Textron Aviation Cessna 510 Citation Mustang
  4. ·         Textron Aviation Cessna 525 Citation Citationjet
  5. ·         Textron Aviation Cessna 650 Citation III-IV-VI-VII
  6. ·         Textron Aviation Cessna 680 Citation Sovereign
  7. ·         Textron Aviation Cessna 750 Citation X
Additional info
Colors Gold
Dimensions (W x H x D) 3.90" x 5.70" x 0.65"
Length 5.70" inches
Weight 0.31 lb
8130-3 Eligible No
ATA Chapter 51 ATA Standard Practices and Structures
Available Conditions NE / NS
Cage Code 88044
Country of origin United States of America
FAA Approval Code STD
Grip 0.469" inches
Hazmat Code Not Applicable
Hazmat(Y/N) N
Material Steel overall
NSN 5306-00-151-2667
Schedule B 7318.15.2000
Thread 3A
Total Shelf Life (days) Not Applicable
Type Bolt
Units of Measure (UoM) Each
Brand Aeronautical Standards Group
Color Gold
Condition status Depreciated