AN4-12A - Textron Undrilled Shank Machine Bolt



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Aeronautical Standards Group​​ - BOLT - AN5-21A
Aeronautical Standards Group​​ - BOLT - AN5-21A

AN4-12A - Textron Undrilled Shank Machine Bolt
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BOLT - AN4-12A
Aeronautical Standard Part

1/4-28, UNF, 3A, Right Hand, 0.468 in L Thread

Description:   BOLT - Undrilled Shank
Part number:   AN4-12A 
Alternate part number:   Beech substitute - 130909B41 

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 nominal 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.

Product Features and Specification:

Thread Direction:Right-hand
Thread Diameter :0.250 inches
Thread Class :3a
Surface Treatment Specification :Class 3 federal specification all treatment responses type 2 qq-p-416
Surface Treatment :Cadmium and chromate
Min. Tensile Strength (psi) :125000 pounds per square inch
Material Specification :Mil-b-6812 military specification all material responses
Material :Steel
Head Style :Hexagon
Head Height :Between 0.140 inches and 0.172 inches
Hardness Rating :26.0 rockwell c and 32.0 rockwell c
Grip Length :0.812 inches
Features Provided :Finished head
Fastener Length :1.281 inches
Thread Length :0.469 inches
Thread Qty Per Inch (tpi) :28
Thread Series Designator :Unf (fine thread)
Width Between Flats :Between 0.428 inches and 0.440 inches

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Additional info
Features • Airframe Bolt • Length: 1-9/32" • Grip: 13/16" • Thread: 1/4-28 • Cadmium Plated Steel • Undrilled Shank
Dimensions (W x H x D) 1.44 "x 0.5" x 0.5" Inches
Length 1.44" Inches
Weight 0.030 lb
8130-3 Eligible NO
Available Conditions NE / NS / OH / AR
Cage Code 5NYP9
Country of origin United States of America
FAA Approval Code STD
Grip 0.812 inches nominal
Hazmat Code Not Applicable
Hazmat(Y/N) N
Material Steel overall. Surface Treatment: Cadium
NSN 5306-00-151-1422
Schedule B 7318.15.2000
Thread 3A-UNF
Total Shelf Life (days) Not Applicable
Type Bolt, Machine Bolt
Units of Measure (UoM) Each
Brand Aeronautical Standard Group Inc