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The angle of chamfer for hexagonal and square nut is ____ degrees as per standards.

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The angle of chamfer for hexagonal and square nut is ____ degrees as per standards.

(a) 30

(b) 45

(c) 60

(d) 15

I have been asked this question in quiz.

My doubt stems from Nut and Washers in division Screw Threads & Screwed Fastening of Engineering Drawing

1 Answer

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Best answer
The correct choice is (a) 30

Explanation: The upper corners of this nut are rounded-off or chamfered. The chamfering is generally conical. The angle of chamfer is 30-45 degrees with the base of the nut. Due to chamfering, an arc is formed on each vertical face and circle is formed on top surface.

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