This durable, standard length of TeacherGeek machine screw is an excellent addition for STEM | STEAM activities or science fair projects. These are longer than the normal 1" (25mm) screws used in most TeacherGeek projects. Excellent for Projectile Launchers, or other special applications. Pair with #10 washers, nuts or locking nuts to craft complex fastening systems.
You may want to use these machine screws with: