What is the major diameter of metric threads?
Emma Johnson
Updated on February 26, 2026
Thread Geometry – Metric Coarse
| Thread | Major Diameter | Pitch |
|---|---|---|
| M1.6 | 1.6 | 0.35 |
| M1.8 | 1.8 | 0.35 |
| M2 | 2.0 | 0.40 |
| M2.2 | 2.2 | 0.45 |
What is the major diameter of a 6 32 thread?
0.138
UNC – Unified Coarse Threads
| Major Diameter (in) | Threads per inch (tpi) | Major Diameter |
|---|---|---|
| (in) | ||
| #6 – 32 | 32 | 0.138 |
| #8 – 32 | 32 | 0.164 |
| #10 – 24 | 24 | 0.190 |
What is the major diameter of a 10 32 screw?
3/16″
10-32 Threads You can identify a 10-32 screw by measuring the diameter at exactly 3/16″ (4.76 mm).
What diameter is M8 thread?
8.0
ISO Metric Machine Screw Thread Dimensions
| Thread Size | Nominal Diameter (mm) | Thread Pitch (mm) |
|---|---|---|
| M8 | 8.0 | 1.25 |
| M10 | 10.0 | 1.50 |
| M12 | 12.0 | 1.75 |
| M14 | 14.0 | 2.00 |
What is meant by minor diameter?
Definition of minor diameter : the smallest diameter of a screw thread.
What is the standard size of an external thread?
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.
What is the standard thread size for bolts?
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.
What do the thread sizes and classes mean?
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. H = P ( 3 1/2 / 2 ) = 0.866025 P or 0.125H = 0.108253P
What is the difference between fractional and metric thread sizes?
In the fractional and screw size systems, the thread count is used, measured in threads per inch. The metric system uses the thread pitch, which is the distance between threads, measured in millimeters. For each thread count, the equivalent thread pitch is provided and for metric taps, the approximate thread count is shown based on the pitch.
