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BA thread refers to the type of thread called BA in the British Standard BS, and the thread angle is 47.5 degrees.
For example, if size is "2BA", then 2 represents the size number.
The size of the pitch is determined by the size number, and in the case of the
PT Screw Taper Angle What is the slope angle on one side?
It is tapered by 1/16 and becomes 3°34'47".
The slope angle on one side is 0.5/16 taper, 1°47'23" per angle.
PT/R/Rc English Pipe Screws
(1)
In order to refer to JIS standards, it is common to refer mainly to the JIS Handbook. It can also be viewed at libraries.
Standards can be viewed via the Internet from the JISC " Japan Industrial Standards Committee website ".
(Please note that printing is
List of tolerances for metric screws (JIS2 grade)
The conventional JIS standard for metric screws has been erased, so it cannot be confirmed from JIS.
In the table below, you can refer to some of the allowable dimensions and tolerances of the conventional JIS2 class, which are still commonly used today.
(ANSI) ASME B1.13M
(DIN) ISO965
Combination of screws for pipes < screws>
There are two types of pipe screws: tapered screws for pipes and parallel screws for pipes.
Thick steel conduit screws
It is a screw specified in JIS as a standard for conduit screws.
JIS C 8305 (Steel conduit)
Thin steel conduit screws
It is a screw specified in JIS as a standard for conduit screws.
JIS C 8305 (Steel conduit)
Implantation bolts: Also known as stud bolts.
This is a standard that specifies the characteristics of steel implantation bolts that are commonly used.
The internal thread that fits into the implantation side is preferably 5H of the metric thread or grade 1.
The external thread on the nut side is 6g (or 2nd gr
・Automobile tire valves
This is a standard for tire valves used in automobile tires and motorcycle tires specified by JIS.
JIS D 4207
・Bicycle tire valves
This is a standard for tire valves used for rubber tubes defined in JIS K 6304.
JIS D 9422
The taps and gauges of these screws are compatible with special produ
