[GreenKeys] Model 28 Leveler Bolt is 1/2-13 x 1 1/2 !!!

[Don Robert House]

You are so right... and correct too! ;-)

The head thickness is not that important in my view.  As for the  
threads going all the way... that can be fixed with the use of a die  
and some thread cutting oil.
I have found a good (and prompt) source for fasteners on-line at: http://www.boltdepot.com/

Thanks for keeping me honest Robert!  I am getting a cataract in my  
left eye so you are not alone...

Don

On 17 Mar 2010, at 12:14 AM, WA5CAB at cs.com wrote:

I will point out that you aren't likely to find bolts with the head  
shown at consumer grade places like Home Depot.  1/2"-13 UNC is one of  
the two common thread diameters and pitches.  But the head thickness  
is going to be roughly 3X that shown.  And probably the 1/2" (length)  
of shank nearest the head will be unthreaded.  Standard spec for Hex  
Head Cap Screws (the proper name) is that lengths from 0 to 1" are  
threaded to the head.  Over 1". only 1" is threaded.  If the length is  
over 1" and it is threaded to the head, it's usually either a  
specialty fastener or a machine screw.  The screw pictured is a  
specialty.

REF: Machinery's Handbook, any Edition since 1914.

Note that by definition in various standards, a screw is always or  
normally intended to be tightened or loosend by turning its head.  A  
bolt is always or normally intended to be tightened or loosened by  
turning the nut into which it is inserted.  Thus, clearly, the item  
pictured below is a screw, not a bolt.  :-)  My cataracts  
notwithstanding.


Robert & Susan Downs - Houston
wa5cab dot com (Web Store)
MVPA 9480