You are trying to correctly fasten parts 2 and 3 together to part 1 using fasten
ID: 2073757 • Letter: Y
Question
You are trying to correctly fasten parts 2 and 3 together to part 1 using fasteners A, B, C, D. Part 1 and part 2 are made of 6061 aluminum while part 3 is made of mild carbon steel. All dimensions are in inches A. For fastener A, a through hole is drilled into part 1 using a #25 drill for a free fit, and a blind. tapped hole is drilled into part 2 with thread engagement x using a #33 drill. What is fasteners A's major diameter and threads/inch? Also, what is the minimum required thread engagement? (3 points) B. For fastener B. a through hole is drilled in part 1 and part 2 with a #32 drill for a close fit. It is a coarse thread fastener. What is fastener B's major diameter and threads/inch? (2 points) C. Fastener C is an 8-32 screw. The hold drilled into part 1 is a clearance hole for a free fit, and the hole in part 3 is a blind, tapped hole with thread engagement y. Which drill size was used to what is the minimum required thread engagement? (3 points) D. For fastener D, a free fit through hole is drilled in part 1 and part 3 with a size H drill. It is a coarse thread fastener. What is fastener D's major diameter and threads/inch? (2 points)Explanation / Answer
Answer A.: Fastener A is 6-32 UNC, with major dia 0.1360 and 32 threads/inch. and thread engagement should be
minimum 0.272".(approx. twice dia of the bolt for aluminum 6061)
Answer B.: Fastener B is Unified Coarse Thread #3-48, with 48 threads/inch, major dia. 0.099".
Answer C.: Fastener C is 8-32 UNC screw and for clearance hole in plate 1 is 0.1770" and drill size is 16.
For plate 3, 29 no tap is used with drill size 0.1360",
& thread depth should be minimum 0.246"(approx. 1.5 times dia of bolt for mild carbon steel)
Answer D.: Fastener D is 1/4-20 UFC with 20 threads/inch and with 0.250" major diameter.
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