ReferenceMaterial Œ Tap Drills for Standard UNC and UNF Threads (Class 2) November 2006 Thread Size Major Diameter Thread Drill Diameter Tap Drill 2-56 0.086 UNC .0670 No. 51 5/16-24 0.3125 UNF .2720 ā€™Iā€™ 3/8-16 0.375 UNC .3125 5/16 3/8-24 0.375 UNF .3320 ā€™Qā€™ 1/2-13 0.500 UNC .4219 27/64 Onceyou know your wire diameter, you need to find out what is the premissable Measurement for your pitch diameter (Depending on the class). Use our Over Wire Calculator to find out! 1 1/8 - 12 UNF : Basic Thread Dimensions (Pitch, minor & major diameters, depth, lead), Tolerance range for all applicable classes and much more. Tapdrill sizes. Cutting conditions for External Threading (Thread Turning & Thread Milling) Cutting conditions for Internal Threading (Thread Turning, Thread Milling & Tapping) 11/8-12: 2a: 1.1250: 1.1232: 1.1118: 1.0691: 1.0631: 1.0210: : 2a: 1.2500: Onceyou know your wire diameter, you need to find out what is the premissable Measurement for your pitch diameter (Depending on the class). Use our Over Wire Calculator to find out! #0 - 80 UNF : Basic Thread Dimensions (Pitch, minor & major diameters, depth, lead), Tolerance range for all applicable classes and much more. 38 inch Thread Size : 3/8 inch - inch 5/16 inch Thread Size : 5/16 inch - inch Parker SAE standard fittings with UN/UNF threads and screw-in connectors with O-ring are designed for connection with UNF screw-in threads. They are also known as O-Ring Boss (O.R.B.) connections. Correctly assembled, they offer as good performance as the best Onceyou know your wire diameter, you need to find out what is the premissable Measurement for your pitch diameter (Depending on the class). Use our Over Wire Calculator to find out! 1 3/16 - 16 16-UN : Basic Thread Dimensions (Pitch, minor & major diameters, depth, lead), Tolerance range for all applicable classes and much more. Size FINE SERIES - UNF: Size Designation: Nominal Major Diameter, in: Threads per Inch, N: Tensile Stress Area, At in 2: Minor-Diameter Area, Ar in 2: 0: 0.0600: 80 .

3 8 24 unf 2a thread dimensions