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Close Tolerance AN Bolts: Diameter / Head Size / Hole Sizes

The document provides information on selecting and interpreting part numbers for close tolerance AN bolts. It explains that the part number indicates properties like diameter, material, plating, grip length, overall length, and whether there are holes in the head or shank. Examples of part numbers and their meanings are also given.

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Jessica Martinez Páez
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623 views2 pages

Close Tolerance AN Bolts: Diameter / Head Size / Hole Sizes

The document provides information on selecting and interpreting part numbers for close tolerance AN bolts. It explains that the part number indicates properties like diameter, material, plating, grip length, overall length, and whether there are holes in the head or shank. Examples of part numbers and their meanings are also given.

Uploaded by

Jessica Martinez Páez
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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Genuine Aircraft Hardware Co.

Close Tolerance AN Bolts


All original Text, Tables, and
Drawings are Copyright 1994-2006
reproduction by permission only.

Diameter / Head Size / Hole Sizes

HELP WITH THE SELECTION OF PART NUMBERS


The first number after “AN17” designates the (Diameter) up to 9/16 diameter. 5/8 diameter and above start with “AN18”.
The next symbol designates material and head drill if applicable.
USE ( - ) After the diameter for (Steel, Cad II plated), no hole in the head.
USE ( C ) In place of ( - ) for (Corrosion Resistant Steel).
ADD ( H ) In place of ( - ), or after ( C ) for a hole in the head.
THE ( A ) The presence of the ( A ) at the very end of all the numbers means that there will be no hole in the shank.
The last number, either single or double digit denotes length. If it is a single digit this is the nominal length in 1/8ths of an inch. If it is a two digit
number, the first is Whole Inches, the second is additional 1/8ths; this is a nominal sizing. SEE THE CHARTS!

Examples of part numbers:

AN174-14* = 1/4 DIAMETER, 28 THREADS PER INCH, STEEL, CAD II PLATING, 1.063 GRIP, 1.531 OVERALL LENGTH, NO HOLE IN HEAD, HOLE IN SHANK.
AN174-14A* = 1/4 DIAMETER, 28 THREADS PER INCH, STEEL, CAD II PLATING, 1,063 GRIP, 1.531 OVERALL LENGTH, NO HOLE IN HEAD OR SHANK.
AN174C14 = 1/4 DIAMETER, 28 THREADS PER INCH, CORROSION RESISTANT STEEL, UNPLATED, 1.063 GRIP, 1.531 O.A.L., NO HOLE IN HEAD, HOLE IN
SHANK.
AN174C14A = 1/4 DIAMETER, 28 THREADS PER INCH, CORROSION RESISTANT STEEL, UNPLATED, 1.063 GRIP, 1.531 O.A.L, NO HOLE IN HEAD OR SHANK.
AN174CH14 = 1/4 DIAMETER, 28 THREADS PER INCH, CORROSION RESISTANT STEEL, UNPLATED, 1.063 GRIP, 1.531 O.A.L, HOLE IN HEAD AND SHANK.
AN174H14 = 1/4 DIAMETER, 28 THREADS PER INCH, STEEL, CAD II PLATING, 1.063 GRIP, 1.531 OVERALL LENGTH, HOLE IN HEAD, HOLE IN SHANK.
AN174H14A = 1/4 DIAMETER, 28 THREADS PER INCH, STEEL, CAD II PLATING, 1.063 GRIP, 1.531 OVERALL LENGTH, HOLE IN HEAD, NO HOLE IN SHANK.

NOTE: all dimensions in inches

* Prior to April of 1990, this series of bolts in the steel material were manufactured with unplated shanks.
If a plated fastener was removed it should be replaced with a plated fastener.

Documents in this book for REFERENCE ONLY, not intended for design. Not guaranteed for accuracy. 7
Genuine Aircraft Hardware Co.
Close Tolerance AN Bolts
All original Text, Tables, and
Drawings are Copyright 1994-2006
reproduction by permission only.

Dash # / Grip Length / Overall Length


NOTE: all dimensions in inches

8 Documents in this book for REFERENCE ONLY, not intended for design. Not guaranteed for accuracy.

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