1 8 thread size There are two common methods to write the thread dimensions 1 Thread sizes in inches are specified by diameter and threads per inch For example in the screw size 10 24 the first digit refers to the thread diameter
Size Thread Form Type Major Diameter mm d D Pitch mm p Threads per inch Pitch Diameter mm d2 D2 Minor Diameter Male Thd d3 Thread Height H1 Tap Drill Diameter mm G1 8 1 8 BSPP 9 728 0 907 28 9 147 8 566 0 581 8 70 G1 4 1 4 BSPP 13 157 1 337 19 12 301 11 445 0 856 11 60 G3 8 3 8 BSPP 16 662 Here s a general way to calculate some of these values Pitch inches 1 TPI Tap Drill Size inches Major Diameter Pitch Minor Diameter approximation For external threads bolts Major Diameter 0 64952 Pitch For internal threads nuts Major Diameter 0 64952 Pitch
1 8 thread size
1 8 thread size
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1 8 2a 1 0000 0 9980 0 9830 0 9168 0 9100 0 8446 1 8 3a 1 0000 1 0000 0 9850 0 9188 0 9137 0 8466 1 12 2a 1 0000 0 9982 0 9868 0 9441 0 9382 0 8960 1 12 3a 1 0000 1 0000 0 9886 0 9459 0 9415 0 8978 1 1 8 7 2a 1 1250 1 1228 1 1064 1 0300 1 0228 0 9475 1 1 8 12 2a 1 1250 1 1232 1 1118 1 0691 1 8 Thread Series 8UN is the specified thread forming method for several ASTM standards including A193 B7 A193 B8 B8M and A320 This series is used for diameters one inch and above
1 4 x 20 UNC US Bolts Tightening Torques UNF Unified National Fine Threads UNF threads ANSI B1 1 Example Typical designation of an UNF thread 1 2 x 20 UNF Sponsored Links Related Topics Fasteners Bolts nuts and threaded rods torque tension and loads Mechanics 1 1 8 7 UNC Basic Thread Dimensions Pitch minor major diameters depth lead Tolerance range for all applicable classes and much more
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Pitch Diameter Depth Flank Angle Thread Angle Taper Angle Standard Thread Dimensions ISO Metric Thread Dimensions Metric Threads Coarse Metric Threads Fine Unified Thread Standard UTS Dimensions UNC Threads UNF Threads American National Standard Pipe Thread Dimensions British Standard Pipe BSP Blog Thread Chart UNF UNC Major and Minor Diameters By Lee Lechner May 16 2022 There are various thread types and sizes to choose from these days Occasionally you need to know the dimensions associated with those threads so we re developing posts like this one to make it easy for you
The following table chart defines standard metric external thread size M1 6 to M18 per ANSI ASME B1 13M 1995 These thread sizes and classes represent bolts and screws as well as other standard external threads Do not use these values for standard metric internal thread design All units in mm These are the M Profile limiting Dimensionings 1 1 8 8 8 UN Basic Thread Dimensions Pitch minor major diameters depth lead Tolerance range for all applicable classes and much more
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1 8 thread size - General Instructions Measure screw diameter or screw size by measuring the width of the threaded part of the screw This corresponds to the first number of the thread size For inches any diameter smaller than 1 4 is indicated by a number referenced in the table below e g 8 corresponds to 0 164