Metric Nuts

A metric nut is a type of fastener with a metric threaded hole and is often paired with a metric bolt or screw to fasten one part to another. The metric nut and bolt or screw are kept together and secured by the threads. Offered in many different styles for your commercial and industrial needs. Available and ready-to-ship in a variety of sizes and finishes. Browse our selection of machine screw nuts for your building projects and industrial applications.

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Cage Nut:  A free floating square nut retained within a spring steel cage. The cage has two retaining legs on the same side of the nut, positioned 180 degrees from each other, that hold the nut in place at pane edges or center panel locations. Free floating nuts will compensate for poorly aligned holes.

Coupling Nut:  A coupling nut is used to join two externally threaded parts of equal thread diameter and pitch, often two pieces of threaded rod. They are used when wrenching is not required and a smooth, outer appearance is preferred. Also referred to as rod couplings. Coupling nuts come in a round body and a hex body. Round couplings nuts are less common than hex couplings.

Hex Jam:  A six-sided internally threaded fastener with a metric thread pitch. The jam nut is approximately ½ the thickness of a Style 2 nut. Jam nuts are chamfered on the top and on the bearing surface. Metric hex jam nuts are tightened against the work surface and a Style 1 or Style 2 hex nut is tightened against the jam nut to keep it from loosening.

Knurled Thumb:  An internally threaded barrel-shaped fasteners integrally formed with a pancake-shaped top which has a knurled edge to facilitate manual tightening and loosening. Designed to be easily tightened and loosened by hand.

Square:  A square nut is a four-sided, internally threaded fastener with a flat bottom side and a chamfered, washer-crowned top. A square nut offers a greater bearing surface for wrenching than hex nuts. Designed for use with square bolts. Available in a thin square nut for tighter spaces.

Hex Nut:  A hex nut is a heat-treated fastener with a metric thread pitch. Nuts M16 and smaller are chamfered on the top and the bearing surface. Nuts M20 and larger may be either double chamfered, or have a washer face on one side and a chamfered surface on the opposite side. Designed for use with metric machine screws and bolts.

Domed Hex Cap:  A one-piece hex nut with a dome-shaped top, similar to an acorn nut, and a threaded hole at the opposite end. Cap nuts are designed for decorative purposes or as covers for protecting threads. The low-type cap nut is chosen when there is limited clearance space above the nut.

Hex Flange Nut:  A hex nut with an enlarged circular base flaring out from the bottom of the nut, and a metric threaded pitch. The bearing surface of the flange is smooth. The flange design will span oversized or poorly aligned holes and provides a more uniform bearing-stress to clamp-force ratio. Serrated hex flange nuts are also available where the bearing surface of the flange has serrations which displace material on the mating surface when the nut is wrenched into place, forming a connection which resists loosening. Requires a greater amount of torque to loosen than to tighten the nut.

Nylon Insert Hex Flange:  A hex nut with a nylon-filled collar at its back end and an enlarged circular base flaring out from the front end of the nut. When an externally threaded fastener reaches the collar, the threads and nylon form a tight, frictional fit as the nylon applies downward pressure that forces contact between the internal and external threads. Can be reused up to 50 times, does not damage threads of the fastener it is used with and withstands extreme vibrations without loosening.

Top-Lock Flange Nut:  An all-in-one metal, one-piece hex nut with a flange on the bottom side. The fastener derives its prevailing torque characteristics from controlled distortion of its top threads from their normal helical form to a more elliptical shape. The nuts are reusable and can withstand severe vibration and shock loads.

Self-Clinching Nuts:  A round, internally threaded, one-piece fastener with a shank protruding from the internal circumference, and a knurled clinching ring surrounding the shank. Both the shank and the clinching ring are integrally formed into the bottom side of the nut. Designed for use in thin sheet metal when load bearing threads are necessary.

Weld Nuts:  A weld nut is designed to be welded to another steel part. Weld nuts come in numerous shapes, thicknesses, configurations and sizes. One advantage to weld nuts is they can be used in restricted space areas. Another advantage is they form the strongest bonds when compared to mechanically clinched fasteners.

Wing Nuts:  A wing nut is a nut with a metric thread pitch and wings set 180 degrees apart from each other which allows the part to be manually turned. Designed for when a part is frequently assembled and disassembled at a place where torque greater than that achieved with finger pressure is not needed.