An assortment of regular and long extruded metric U"-nut variants from Hillman. Speed nuts act as both a lock washer and nut, and are designed for quick application and removal. The extruded metric "U"-nut variants included in this assortment come engineered to fit myriad screws sized M6 thru M10. Full assortments of #58458 contain six (6) refills comprised of Hillman item numbers #58459 - #58464.