PRODUCT SPECIFICATIONSPart #: 0000-107229Fastener Type: Finished Hex NutSize Description: 1/4"-28Diameter/Nominal Size: 1/4"Thickness: 7/32 (0.212-0.226")Wrench Size/Across Flats: 7/16" (0.428-0.438")Width Across Corners: 0.488-0.505"Thread Pitch: 28Thread Pitch Type: FineThread Direction: RightSystem of Measurement: InchGrade: 2Material: Low Carbon SteelFinish: Zinc PlatedDrive Type: External HexUsed with: Bolts/Screws up to Grade 5Average Piece Weight: 0.0070400 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.