#10-32 UNF Thread Specs
Standard: ASME B1.1 (UNF)
Find the technical dimensions, threads per inch (TPI), and tapping guidelines for the #10-32 UNF unified thread.
Compliant with the ASME B1.1 standard, this size has a nominal major diameter of 0.19 inches (4.83 mm) with a pitch of 0.03125 inches (TPI of 32).
For general engineering or fastening, the standard recommended tap drill is 0.1588 inches (4.03 mm) to achieve adequate thread engagement.
Dimensional Specifications (Inches & mm)
Size Designation
#10-32 UNF
Major Diameter (Nominal)
0.19 in(4.83 mm)
TPI (Threads per Inch)
32
Pitch
0.03125 in
Pitch Diameter
0.1697 in(4.31 mm)
Minor Diameter (Ext)
0.1562 in(3.97 mm)
Minor Diameter (Int)
0.1596 in(4.05 mm)
Thread Height
0.0271 in
Drilling & Strength Specs
Tap Drill Size
0.1588 in(4.03 mm)
Stress Area
0.02 in²(12.9 mm²)
Quick Unit Converter
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Frequently Asked Questions
What is the tap drill size for #10-32 UNF?
The recommended tap drill size for a #10-32 UNF thread is 0.1588 inches (approx. 4.03 mm) to achieve standard thread engagement.
How many threads per inch (TPI) does a #10-32 UNF bolt have?
A standard #10-32 UNF thread has exactly 32 threads per inch (TPI), with a corresponding linear pitch of 0.03125 inches.
What is the major diameter of a #10-32 UNF thread in millimeters?
The nominal major diameter of a #10-32 UNF thread is 0.19 inches, which converts to 4.83 mm.