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Old 29th March 2010, 12:20 PM   #3
Dream Team - School Guru
Join Date: Aug 2006
Posts: 2,177

nonopr has it right!
Nowhere I know of that will sell you a cap screw/bolt/machine screw where the length of the head is included in the length.
The heads are all to a standard, the thread and unthreaded portion of the length add up to the total length from the bottom of the head to the end of the screw threads.
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