Size: 0.39" (10mm) width across flat, 0.2" (5mm) height.
Material: The hex nut is made of high quality 304 stainless steel, rust resistance, more strong than regular steel.
Widely-used: Hex nuts are used with mating screws and bolts to help secure items. Hexagonal fasteners are used in a variety of applications. Can be used in furniture, household appliances, building frames, kids' toys, automobiles and more.