Also known as collar nuts, these metric nuts have a flange that distributes pressure across the surface, so you don't need a washer. Made of high-strength Class 10 steel, they’re about 25% stronger than medium-strength steel flange nuts.

About half the strength of medium-strength steel flange nuts, use these metric nuts in light duty fastening applications, such as securing access panels.

These Grade 5 flange nuts are suitable for fastening most machinery and equipment.

These nuts are about 25% stronger than medium-strength steel flange locknuts.

Strong enough for use in most machinery and equipment, these medium-strength metric nuts have serrations on the underside of the flange. The serrations prevent the nuts from loosening in applications with mild vibration.

These flange locknuts are comparable in strength to Grade 8 bolts.

Choose these flange locknuts for their adherence to strict military standards for material and construction.