These square nuts have a four-sided, square design which provides a greater bearing surface when installing. Square nuts are designed for use with square headed bolts, though they can also be used with some machine screws. The large surface provides better resistance to loosening . Also used with flat washers of compatible size and material.
California residents: see Proposition 65 information
- 2 pieces per pack
- Steel construction
- 1/4 in.-20