Normal Machine Screw Dies
According to the threads, the commonly used machine screw thread rolling die can be divided into：
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Metric thread (M, MJ)
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American thread (UNC, UNF, UNEF, UNR, UNS, UNJC, UNJF)
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British Whitworth Thread (BSW, BSF)
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British Association Thread (BA)
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Trapezoidal thread (30 degree or 29 degree)
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Bicycle Thread (BC)
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Sewing Machine Thread (SM)
Above Machine screw dies with RROC, we have our own intellectual property rights patents.
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