Military Grades: Enlisted (E7 and below)
Minimum Requirements: Experience or training that has provided the candidate with the ability to plan, manufacture, and install cylindrical, square, or rectangular-shaped objects that have easily constructed fastenings such as single and double-hem edges and single, double or grooved seams.
Specialized Experience: Experience or training in planning, layout, and construction skills to manufacture items and systems with dovetailed seams, set-in-bottom seams, burred-bottom seams, or wired or lock seams. Experience using more complicated shop tools and equipment. Experience in using metals including stainless steel, copper sheet, magnesium, honeycomb material and alloys. Experience demonstrating the use of more complicated mathematical calculations and complicated measuring instruments.