M60 Thread Specs
Standard: ISO 261 (ISO Metric Coarse)
This reference guide outlines the technical dimensions and tapping parameters for the standard M60 metric thread.
Part of the ISO Metric Coarse series defined by ISO 261, the thread features a nominal diameter of 60 mm and a pitch of 5.5 mm.
For machining or fabrication, the recommended tap drill size is 54.5 mm (for 75% thread depth) or 54.84 mm (for 65% thread depth).
Dimensional Specifications (mm)
Nominal Diameter
60 mm
Pitch
5.5 mm
Threads per mm
0.18
Major Diameter
60 mm
Pitch Diameter (d₂)
56.428 mm
Minor Diameter (d₁) Ext
54.046 mm
Minor Diameter (D₁) Int
54.84 mm
Thread Height
4.763 mm
Root Radius
0.794 mm
Drilling & Strength Specs
Tap Drill (75%)
54.5 mm
Tap Drill (65%)
54.84 mm
Stress Area
2362.02 mm²
Stress Diameter
53.252 mm
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Frequently Asked Questions
What is the tap drill size for a M60 thread?
For standard thread engagement (approx. 75%), the recommended tap drill size for M60 is 54.5 mm. For a slightly looser 65% thread engagement, a 54.84 mm drill bit is recommended.
What is the pitch of a M60 thread?
The thread pitch for a standard M60 thread is 5.5 mm, which equates to approximately 0.18 threads per millimeter.
What are the major and pitch diameters for M60?
The nominal major diameter of M60 is 60 mm. The calculated pitch diameter (d₂) is 56.428 mm per the ISO 68-1/ISO 261 standards.