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1/4 - 20 UNC : Basic Thread Dimensions (Pitch, minor & major diameters, depth, lead), Tolerance range for all applicable classes and much more.
Minor Diameter Pitch Diameter Major Dia-meter ... 1/4-20 UNC 0.0011 0.1960 0.2070 0.2175 0.2224 0.0049 0.2500. NUTS WWW.AMERICANFASTENER.COM – 724 444 6940 – 1 800 466 9780 INTERNAL THREADS – CLASS 2B ... 3 1/2-4 UNC 0.0033 3.2290 3.2670 3.3376 3.3519 0.0143 3.5000
UNC thread chart including major diameter, pitch diameter and minor diameter dimensions of UNC screw threads according to ASME B1.1 standard.
23 lut 2024 · We provide an accurate UNC and UNF Thread Chart PDF for your reference and download, so that you can quickly understand the dimensions (size in mm) and specifications of UNC/UNF threads!
Internal Thread Dimensions for Unified UNC Screw Threads Diameter Pitch ... Major Diameter Pitch Diameter Minor Diameter Stress Area Max Min Max Min Max Min in² No 1 64 2B 0.0730 0.0655 0.0629 0.0623 0.0561 0.00263 No 2 56 2B 0.0860 0.0772 0.0744 0.0737 0.667 0.00370 ... 1/4” 20 2B 0.2500 0.2224 0.2175 0.2070 0.1960 0.03180
4 lis 2012 · UNF – Unified National Fine Thread. Female and Male UNC/UNF threads are both parallel. The UNC/UNF flank angle is 60°. Unified threads comes in three different classes: for applications where a liberal tolerance is required to permit easy assembly even with slightly nicked threads.
MajorDiameter MinorDiameter Thread. UNC Thread Chart (Unified Inch Coarse Screw Thread Dimensions, Sizes, Diameters) Thread (in) Threads per inch (tpi) Major Diameter. Minor Diameter. Tap Drill Size (mm) Pitch (mm)
