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answer

There are also tolerances in the angle and pitch of the gauge , and there are minute differences on the front and back.


When the effective diameter of the external thread to be judged is close to each other (just about large), the difference may not interfere with it.

 

It

No : 269
Published : 2025/03/07 00:00 Modified : 2025/04/17 07:24
Category: Screws in general
answer
It is a precision measuring tool and guarantees the product, so it is not used to remove welding.
 
In particular, care must be taken when inspecting aluminum because it is easy to weld.
 
OSG offers a threaded gauge with DLC coating that is effective when inspecting aluminum as standard stock.
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No : 270
Published : 2025/03/07 00:00 Modified : 2025/04/17 07:24
Category: Screws in general
answer

If you want to convert the size and pitch of the unified thread standard to millimeters, please refer to the conversion table below.

You can check the number of UNC, UNF, and UNEF piles of unified threads, as well as UN standards.

References: Refer to the Unified Thread System Conversion Table.   <

No : 285
Published : 2025/03/07 00:00 Modified : 2025/04/17 07:24
Category: Screws in general
answer

BSF stands for F in BS (UK).

It corresponds to the fine line of W (thread angle 55°).

Please note that it cannot be shared with a unified thread angle of 60°.

Tap is available for special products.

(FAQID:288)

No : 288
Published : 2025/03/07 00:00 Modified : 2025/04/17 07:24
Category: Screws in general
answer

Pg screws are conduit screws in the German DIN standard, and the tool is compatible with special products.

▽ Thin steel conduit screws JIS C 8305
CTC Threads and Pg Threads

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Screw symbol CTC Pg
standard JIS B 0204
No : 291
Published : 2025/03/07 00:00 Modified : 2025/04/17 07:24
Category: Screws in general
answer
NC screws are American 60-degree screws. Tap can be shared, but gauge can be used as a special product.

(FAQID:292)

No : 292
Published : 2025/03/07 00:00 Modified : 2025/04/17 07:24
Category: Screws in general
answer

Since it represents the number of mountains between 1 inch (= 25.4 mm), the pitch conversion (mm) can be calculated by dividing 25.4 by the number of mountains.

▽ Unified Screw Representation
Since the unit of measurement is inches, it needs to be converted to millimeters.
Calculated as 1 inch = 25.4 mm.

For 3/8-16 UNC,
・Outer diameter = 3/8
25.4×3/8=9.525mm
Pitc

No : 294
Published : 2025/03/07 00:00 Modified : 2025/04/17 07:24
Category: Screws in general
answer
W (wit) has a thread angle of 55°, and U (unify) has a thread angle of 60°, so it is not recommended to fit them together.

(FAQID:298)

No : 298
Published : 2025/03/07 00:00 Modified : 2025/04/17 07:24
Category: Screws in general
answer

There are two types of camera release screws: parallel screws and tapered screws. Both Tap (M3.4x0.5) are special.

gauge is also a special product, but the external thread is only a tapered screw, and the taper (slope angle of 14°) is too strong to produce a ring gauge .

No : 299
Published : 2025/03/07 00:00 Modified : 2025/04/17 07:24
Category: Screws in general
answer

Compare the difference in effective diameter Conventional JIS and ISO ・ Screw and screw gauge ・ external thread and internal thread    

The figure below shows the positional relationship between the thread accuracy, the thread and the thread gauge, external thread and

No : 9682
Published : 2021/10/04 13:00 Modified : 2024/08/28 02:29
Category: Screws in general

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