Pre-Thread Diameter

This chart apply for our threaded round bar products, and fastener products, for example anchor bolts, rock bolts, stud bolts, anchor cages.

If any doubt or questions, our engineers are always pleased to help. [email protected]

Pre-Thread Diameter
            Unit：mm
Norminal Diameter D Basic Pitch Diameter d2 Fundamental Deviation
es		 Pitch Diameter Tolerance Td2 Pre-Thread Diameter d Pitch P
             
M9 8.188 0.028 0.118 8.10 8.13 1.25
M10 9.026 0.032 0.132 8.93 8.96 1.5
M11 10.026 0.032 0.132 9.93 9.96 1.5
M12 10.863 0.034 0.15 10.75 10.79 1.75
M14 12.701 0.038 0.16 12.58 12.62 2
M15 14.026 0.032 0.14 13.92 13.96 1.5
M16 14.701 0.038 0.16 14.58 14.62 2
M18 16.376 0.042 0.17 16.25 16.29 2.5
M20 18.376 0.042 0.17 18.25 18.29 2.5
M22 20.376 0.042 0.17 20.25 20.29 2.5
M24 22.051 0.048 0.2 21.90 21.95 3
M25 23.701 0.038 0.17 23.58 23.62 2
M26 25.026 0.032 0.15 24.92 24.95 1.5
M27 25.051 0.048 0.2 24.90 24.95 3
M28 26.701 0.038 0.17 26.58 26.62 2
M30 27.727 0.053 0.212 27.57 27.62 3.5
M32 30.701 0.038 0.17 30.58 30.62 2
M35 34.026 0.032 0.15 33.92 33.95 1.5
M36 33.402 0.06 0.224 33.23 33.29 4
M38 37.026 0.032 0.15 36.92 36.95 1.5
M39 36.402 0.06 0.224 36.23 36.29 4
M40 38.051 0.048 0.2 37.90 37.95 3
M42 39.077 0.063 0.236 38.90 38.96 4.5
MJ45 43.051 0.048 0.2 42.90 42.95 3
M45 42.077 0.063 0.236 41.90 41.96 4.5
M48 44.752 0.071 0.25 44.56 44.63 5
M50 48.051 0.048 0.212 47.90 47.95 3
M52 48.752 0.071 0.25 48.56 48.63 5
M55 52.402 0.06 0.236 52.22 52.28 4
MJ56 54.051 0.048 0.212 53.90 53.95 3
M56 52.428 0.075 0.265 52.22 52.30 5.5
M58 55.402 0.06 0.236 55.22 55.28 4
M60 56.428 0.075 0.265 56.22 56.30 5.5
M62 59.402 0.06 0.236 59.22 59.28 4
M64 61.402 0.06 0.236 61.22 61.28 4
M64 60.103 0.08 0.28 59.88 59.96 6
M65 62.402 0.06 0.236 62.22 62.28 4
M68 64.103 0.08 0.28 63.88 63.96 6
M70 66.103 0.08 0.28 65.88 65.96 6
Formula：d=d2-es-(Td2/2)
Threaded Rods
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Post time: Sep-26-2018