5821-99-947-7986

5310-99-944-8809 5310999448809 999448809 is a nut, flat on top and bottom, having 4 flat sides. for items having a thickness (or height) exceeding two times the width across the flats, use post, electrical-mechanical equipment. (when height or thickness and/or width across the flats is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.)