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americanNPT pipe thread i want how much taper it has depends on the pipe size/diameter
One-piece cranks use 1/2" thread
One-piece cranks use 1/2" thread
3/4" garden hose threads (GHT).
SAE is American or standard thread and metric is everything else. The size or diameter is different and the pitch of the thread is different also.
Dufferin did not always use the same thread as a standard but it should be a 3/8 - 10.
18 mm standard thread.
Yes. 1/2 x 28 TPI RH
All thread pitches are standard inch size thread pitches. I can't be more specific than that since I don't know exactly which bolt you are talking about. An example for you is the starter bolts are a 3/8-16 pitch, which is standard coarse thread. Most body panel bolts are either 5/16-18 or 3/8-16 pitch, once again, standard coarse thread pitches.
Bolts are categorised by their thread size. The standard socket size for a bolt with a three quarter inch thread is 1 and one eighth inches. Heavy head bolts use a one and a quarter inch socket.
The ANSI B1.11 Microscope Objective Screw Threads standard covers the single screw thread size: 0.8000"-36 AMO. The standard lays out the screw thread parameters and the parameters for screw thread gauging. There is some mis-information published on the web related to this screw thread which is corrected at this webpage: http://www.ring-plug-thread-gages.com/ti-spec-ANSI-ASME-B1.11.htm
What is the thread size for a Winchester Model 90?