Fasteners assignment part c 3 8 16 unc 2a 1 5 flat head
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Fasteners Assignment Part C: 3/8-16 UNC-2A 1.5 FLAT HEAD. Check PDF packet page one for quick reference to page numbers… Start by drawing the following vertical rectangle .375x1.5. Offset top line down ½ D (0.1875) Draw a line from the blue circle intersection heading “@1<50”

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Fasteners assignment part c 3 8 16 unc 2a 1 5 flat head

Fasteners AssignmentPart C: 3/8-16 UNC-2A 1.5 FLAT HEAD


Check PDF packet page one for quick reference to page numbers…

Start by drawing the following vertical rectangle .375x1.5


  • Offset top line down ½ D (0.1875) numbers…

  • Draw a line from the blue circle intersection heading “@1<50”

  • Mirror angled line over to the left side of the fastener and fillet, trim, extend, / erase.


Add slot for screw driver. Dimensions for height and width are 1/4D as noted in the book example.


  • Check last page of PDF for dimensions of steel plates. are 1/4D as noted in the book example.

  • Top plate has a clearance hole for the fastener.

  • Bottom plate is tapped (threaded)- See page 1 of PDF for page number referencing threaded holes

  • Bottom plate has more threads cut than length of bolt, i.e. bolt can’t bottom out without fully tightening down.

  • Pilot hole (pre-drilled hole before tapping can occur) extends lower than threads and has 80 degree angle (same as the twist drill bit that cut the hole). Dimensions can be “eye balled.”


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