Question regarding "standard" bolt shoulder lenghts
Question regarding "standard" bolt shoulder lenghts
(OP)
Is there standardized formula or rule of thumb, for determining shoulder(shank)length versus total length, of a grade 8 hex head bolt? I am looking for a chart or a rule of thumb that shows the how long of a bolt is required
to get specific shoulder length. For instance. How long of a 5/8" bolt would I need to have 3 3/4" shoulder?
Thanks in advance.
to get specific shoulder length. For instance. How long of a 5/8" bolt would I need to have 3 3/4" shoulder?
Thanks in advance.





RE: Question regarding "standard" bolt shoulder lenghts
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RE: Question regarding "standard" bolt shoulder lenghts
maximum thread length is longer
If you want a specific length of unthreaded shoulder then you may need to buy a shoulder bolt.
In your example above: minimum thread length = 2x5/8 + 1/4" = 1 1/2" so you would need a 5 1/4" long bolt, except they don't come in that length.
RE: Question regarding "standard" bolt shoulder lenghts
Min thread length = 2*D + .250"
For inch fasteners greater than 6 inches:
Min thread length = 2*D + .500"
Shank length = Total Length - Thread Length
Ref: Shigley, Mechanical Engineering Design (2001)
You may also want to look into Bickford's book for more details about bolts and bolted joints.
RE: Question regarding "standard" bolt shoulder lenghts
RE: Question regarding "standard" bolt shoulder lenghts