How to Express Unified Thread Designa...

There are two ways to express unified thread sizes: the “No. XX” designation and fractional notation such as 1/4. They may also be written in decimal form... 詳細表示

Difference Between PS and PF

Q: For PS and PF screw types, is it possible to share thread‑machining tools and gauges? A: Both are parallel pipe threads, but their tolerance settings dif... 詳細表示

Can Rp and PS Threads Share Tools?

There are two types of parallel internal pipe threads: Rp specified in the current JIS and PS specified in the former JIS. Tools such as taps can be shared.... 詳細表示

List of Thread Standards

A list of the standard numbers and symbols for major thread types can be found in our Hole Thread Machining Tool Product Catalog. However, detailed dimensio... 詳細表示

PT Thread Taper Angle – What is the s...

PT threads have a taper of 1/16, which corresponds to an included angle of 3°34′47″. The slope angle on one side is half of that taper (0.5/16), which is 1°... 詳細表示

W (whitworth) and U (unified) threads

W (whitworth) threads have a thread angle of 55°, and U (unified) threads have a thread angle of 60°, so it is not recommended to fit them together. 詳細表示

C‑mount threads and available machini...

A C‑mount thread is a mounting thread for photographic lenses used on motion‑picture cameras, as specified in the former JIS standard. The designation 1‑32U ... 詳細表示

What is a straight thread?

In general, the term straight threads often refers to a parallel thread. For example, if a customer specifies only “1/4 straight thread” in an order, the ... 詳細表示

pipe screw 6A 8A 10A 15A 20A 25A 32A 40A

In drawings, “10A” may be written in place of the pipe thread designation. This “10A”refers to the 3/8‑inch pipe thread size. ○○A is a size expression in... 詳細表示

What is an NC thread?　Is it possible ...

NC threads are American 60-degree threads. Tap can be shared, but gauges must be treated as special‑purpose items. 詳細表示