Grade F nuts are comparable in strength to Grade 5 bolts.

Grade G nuts are comparable in strength to Grade 8 bolts.

About half the strength of medium-strength steel flange locknuts, these are for light duty fastening applications, such as securing access panels.

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.

They're about 25% stronger than medium-strength steel flange locknuts and comparable in strength to Class 10.9 bolts.

Metric 18-8 stainless steel is also known as A2 stainless steel. These flange locknuts have good chemical resistance and may be mildly magnetic.

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.

Made from Grade 8 steel, these nuts are about 25% stronger than medium-strength steel flange nuts.

These metric nuts meet JIS (Japanese Industrial Standard) B 1190.

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

No need for a washer—these metric medium-strength steel nuts have a flange that distributes pressure across its surface the way a washer does. Made of medium-strength, Class 8 steel, they’re suitable for fastening most machinery and equipment.

Made from 18-8 stainless steel, these flange nuts have good chemical resistance.

More corrosion resistant than 18-8 stainless steel flange nuts, these nuts have excellent resistance to chemicals and salt water.

Stainless steel nuts have excellent corrosion resistance in most environments.

These flange nuts have a black-oxide finish for mild corrosion resistance in dry environments.

Also known as Keps and K Lock nuts, these locknuts have a free-spinning tooth lock washer that grips the material surface instead of threads for easy installation and mild vibration resistance.

These stainless steel locknuts have good chemical resistance and may be mildly magnetic.

A conical washer acts as a spring to add tension between the nut and the material surface for easy installation and mild vibration resistance. These metric locknuts have a smooth rim to resist scratching materials when tightened.