What Are the Thread Types

UN/ (BSP, parallel)BSPT (BSP, tapered)metric parallel.metric tapered.

What are the two types of thread?

• Right-hand threads.
• Left-hand threads.
• taper threads.
• “V” shape threads.
• Metric or International Threads.
• British Standard Threads.
• Seller Threads.
• Square Threads.

How do I identify a thread type?

1. Determine if the thread is straight (parallel) or tapered. The thread is tapered if the diameter increases or decreases. …
2. Measure the thread diameter. …
3. Determine the number of threads per inch (TPI) or the pitch (metric threads) with the thread gauge. …
4. Determine the thread standard.