Nylon 6/6 Hex Nut, Black, 3/4"-10 Thread Size, 1 7/64" Width Across Flats, 41/64" Thick (Pack of 25) Hex nut tightens from the side with a wrench, enabling use when there is limited space above the nut Nylon 6/6 provides resistance to abrasion, corrosion, and many chemicals, is nonconductive, and is a strong yet lightweight plastic Color is black