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ISO 2901 - Metric Trapezoidal Screw Threads

Dimensions of ISO metric trapezoidal screw threads.

Trapezoidal threads screw

Dimensions of ISO metric trapezoidal screw threads are indicated in the table below.

ISO 2901 - Metric Trapezoidal Screw Threads
Outside Diameter Screw
(mm)
Pitch
(mm)
Inside Diameter Nut
(mm)
Crest Nut
(mm)
Outside Clearance
(mm)
Inside Clearance
(mm)
8 1.5 6.5 0.55 0.15 0.15
10 1.5 8.5 0.55 0.15 0.15
10 2 8.0 0.73 0.25 0.25
12 2 10.0 0.73 0.25 0.25
12 3 9.0 1.10 0.25 0.25
16 2 14.0 0.723 0.25 0.25
16 4 12.0 1.46 0.25 0.25
20 2 18.0 0.73 0.25 0.25
20 4 16.0 1.46 0.25 0.25
24 3 21.0 1.10 0.25 0.25
24 5 19.0 1.83 0.25 0.25
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