Reverse (Left Handed) Screw and Bolt for Testing your 3D Printer

Overview & Background: Mechanical test.
Objectives: observe Screw marge in for 3D printing
Audiences: Maker,designer.
Subjects: testing Technology.
Skills Learned (Standards): none.
Lesson/Activity: Learn to use Repetier Host and Cura. 3D printed bridges on the top of the part. (No support required)
Duration: 10 hours printing.
Preparation: Have a paper sheet to note all yourobservations.
References: nothing to report.
Rubric & Assessment: None.
Handouts & Assets: see the picture..