1"-12 or 1"-14 UNF?

[danbui]

Wildfire-2 hole creation has 1-14 as UNF, but Machinery's Handbook says that 1-12 is UNF and 1-14 is UNS. Mc Master-Carr screw selection calls 1-14 as UNF. Which one is right?

 

[CorBlimeyLimey]

If in doubt, accept the Machinery's Handbook ... ... usually.

Also see;

http://www.efunda.com/designstandards/screws/unified.cfm?start=228&finish=301

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