PRODUCT SPECIFICATIONSPart #: 0000-126248Fastener Type: Regular Square NutSize Description: 1"-8Diameter/Nominal Size: 1"Thickness: 7/8" (0.847-0.903")Wrench Size/Across Flats: 1 1/2" (1.450-1.500")Width Across Corners: 1.961-2.121"Thread Pitch: 8Thread Pitch Type: CoarseThread Direction: RightSystem of Measurement: InchGrade: 2Material: Low Carbon SteelFinish: Hot Dip GalvanizedDrive Type: External SquareUsed with: Bolts/Screws up to Grade 5Average Piece Weight: 0.3630000 lbs.Nuts are almost always used in conjunction with a mating bolt to fasten multiple parts together; kept together by a combination of their threads' friction, a slight stretching of the bolt, and compression of the parts to be held together.