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UNC Thread Specifications This table gives the basic thread dimensions for UNC (Unified National Coarse) threads per ASME B1.1. These are the numbers you need for thread design, tolerance calculation, and thread gauge verification. Size TPI Major Ø (in) Pitch Ø (in) Minor Ø (in) Tensile Stress Area (in²) #1-64 64 0.0730 0.0629 0.0527 0.00263 … Read more