Description:

2b thread class, right-hand , square nut style, 0.178 inches nut height, 0.423 inches width across flats, unc thread series, 20 thread quantity per inch.

Properties:

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.)