M6.5 socket head shoulder screws?

[whippet]

I have an ANSI metric specification B18.3.3M that only lists 6.5mm, 13mm & 25mm diameter socket head shoulder screws. SolidWorks toolbox only has 6.5mm, 13mm & 25mm socket head shoulder screws. I have an Unbrako slide reference guide that only lists 6.5mm, 13mm & 25mm socket head shoulder screws.
I also have an Unbrako and MSC catalogs that only list 6mm, 12, & 24mm socket head shoulder screws, and when I called Unbrako they could only tell me that 6 & 12mm diameters are the only sizes available.
I don’t get it. Does any one know this history?

have fun make money
Paul

 

[procadman2]

Surprisingly I haven't ran into this before.

I can't find a refernce to 6.5, 13, or 25mm nominal sizes.

(Machinery Handbook 26th edition or a Holo-Krome slide ref.)

I also haven't seen these sizes in the last 10 years or so while using metric hardware exclusively. They almost seem like bastardized "inch" sizes.

As for Solidworks I wouldn't put too much trust in models I haven't personally created or verified.

procadman2
Proe Design & Admin
NASA Contractor

"You can't build a reputation on something you haven't done."
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