What is a 3/8 fine thread?
Table of Contents
What is a 3/8 fine thread?
Thread Pitch Chart
| Coarse Thread Series – UNC | Fine Thread Series – UNF | |
|---|---|---|
| Nominal Size and Threads Per In. | Basic Pitch Dia. | Nominal Size and Threads Per In. |
| 3⁄8 – 16 | 0.3344 | 3⁄8 – 24 |
| 7⁄16 – 14 | 0.3911 | 7⁄16 – 20 |
| 1⁄2 – 13 | 0.4500 | 1⁄2 – 20 |
What is coarse thread size?
Inch sizes are specified using the nominal major diameter and the number of threads per inch. For example, a 3/8-16 (coarse) thread has a 3/8″ nominal major diameter and 16 threads per inch, while a 3/8-24 (fine) thread has the same nominal major diameter and 24 threads per inch.
What thread pitch is 3/8 UNC?
UNC Thread ANSI/ASME B1. 1
| Nominal Diameter | Major Diameter Inch | Pitch mm |
|---|---|---|
| 3/8″ – 16 UNC | 0.375 | 1.587 |
| 7/16″ – 14 UNC | 0.438 | 1.814 |
| 1/2″ – 13 UNC | 0.500 | 1.954 |
| 9/16″ – 12 UNC | 0.563 | 2.117 |
What is the standard thread on a 3/8 bolt?
Standard Thread Pitch Chart
| Coarse Thread Series – UNC | Fine Thread Series – UNF | |
|---|---|---|
| Nominal Size and Threads Per In. | Basic Pitch Dia. | Nominal Size and Threads Per In. |
| 3⁄8 – 16 | 0.3344 | 3⁄8 – 24 |
| 7⁄16 – 14 | 0.3911 | 7⁄16 – 20 |
| 1⁄2 – 13 | 0.45 | 1⁄2 – 20 |
What is the difference between coarse thread and fine thread?
What is the difference between fine and coarse thread fasteners? A. A fastener with a fine thread equates to a fastener with a large number of threads per distance along the fastener. In contrast, a coarse thread fastener equates to a fastener with a low number of threads per distance along the fastener.
What size is a 3/8 thread?
Standard Thread Pitch Chart
| Coarse Thread Series – UNC | ||
|---|---|---|
| Nominal Size and Threads Per In. | Basic Pitch Dia. | Section at Minor Dia. |
| 3⁄8 – 16 | 0.3344 | 0.0678 |
| 7⁄16 – 14 | 0.3911 | 0.0933 |
| 1⁄2 – 13 | 0.45 | 0.1257 |
How do I know if I have fine or coarse thread?
Threading are uniform ridges of varying height and width (from fastener to fastener) that wrap around a cylinder. This helical shaped threading can be either wide set and deep which are considered coarse thread while a more narrow helical shape with shallow ridges is considered to be fine thread.
What pitch is a 3/8 16 thread?
0.3750
US Standard Threads are measured in TPI (Threads per Inch). They are measured by finding the number of thread crests in 1″ of threads….US Standard Thread Pitch.
| Coarse Thread – NC | ||
|---|---|---|
| Thread | Decimal | Tap Drill |
| 1/4-20 | 0.2500 | 7, 13/64 |
| 5/16-18 | 0.3125 | F |
| 3/8-16 | 0.3750 | 5/16 |
How can you tell the difference between fine thread and coarse thread?
To be classified as coarse, the threading must be deep set and wide. On the other hand, fine threaded fasteners will have narrower, shallow ridges and a smaller pitch, with a higher number of threads per axial distance than coarse threaded bolts.
