M3.5 Nuts | McMaster-Carr

Stronger than PTFE nuts and resistant to solvents, bases, and acids—including hydrochloric and nitric acid—these PVDF nuts are often used in chemical processing equipment.

Metric Brass Hex Nuts

These metric nuts are corrosion resistant in wet environments, electrically conductive, and nonmagnetic.

Low-Strength Steel Thin Hex Nuts

These nuts should be used for light duty fastening applications, such as securing access panels.

Super-Corrosion-Resistant 316
Stainless Steel Narrow Hex Nuts

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

Metric Low-Strength Steel Coupling Nuts

For light duty applications, choose these metric-sized coupling nuts.

Plastic Coupling Nuts

Plastic coupling nuts are chemical resistant, nonconductive, and lightweight.

Steel Extra-Long Coupling Nuts

Known for their strength, steel coupling nuts are available with a corrosion-resistant finish.

Metric Steel Press-Fit Nuts for Sheet Metal

Press these metric nuts into a drilled or punched hole with an arbor press or similar pressure tool.

Metric Stainless Steel Press-Fit Nuts for Sheet Metal

These metric nuts have good chemical resistance and may be mildly magnetic.

Metric 18-8 Stainless Steel Knurled-Head Thumb Nuts

Made from 18-8 stainless steel, these metric thumb nuts have good chemical resistance and may be mildly magnetic.

Metric 18-8 Stainless Steel
Flanged Knurled-Head Thumb Nuts

These metric thumb nuts have good chemical resistance. The flange distributes pressure over a large area to reduce stress on your part.

Metric Brass Flanged Knurled-Head Thumb Nuts

These metric thumb nuts are corrosion resistant in wet environments, electrically conductive, and nonmagnetic. The flange distributes pressure over a large area to reduce stress on your part.

Steel Offset-Barrel Narrow-Base Weld Nuts

Weld these nuts to uncoated steel surfaces.

Threaded Standoffs

Female Threaded Hex Standoffs

Male-Female Threaded Hex Standoffs

Thread Adapters

Metric-to-Metric Female Hex Thread Adapters

Increase or decrease metric thread size from one male-threaded part to another. Commonly used to connect two differently sized threaded rods, they have a hex-shaped body, so you can tighten them with a standard wrench.

Inch-to-Metric Female Hex Thread Adapters

Adapt threaded rods from inch to metric. These adapters connect two male-threaded fasteners, so you can change the gender of a mating part or increase or decrease its thread size. The hex-shaped body fits into the head of a standard wrench.

Metric-to-Metric Male-Female Hex Thread Adapters

In addition to joining male- and female-threaded parts, these adapters can increase or decrease metric thread sizes and change the thread pitch.

Inch-to-Metric Male-Female Hex Thread Adapters

Change inch threads to metric with these adapters, or swap metric threads for inch. An external hex lets you tighten or loosen them with a wrench.

Metric-to-Metric Male Hex Thread Adapters

Twist these adapters onto female metric threads to change pitch or switch thread sizes.

Inch-to-Metric Male Hex Thread Adapters

One side inch, one side metric, and a hex in the middle—these handy fasteners connect two female-threaded parts, such as coupling nuts, adapting from inch threads to metric. Tighten with a standard wrench.

Nuts

Metric Medium-Strength Steel Hex Nuts—Class 8

Metric Low-Strength Steel Hex Nuts

Metric 18-8 Stainless Steel Hex Nuts

Metric Super-Corrosion-Resistant316 Stainless Steel Hex Nuts

Metric Nylon Hex Nuts

Impact-Resistant Polycarbonate Hex Nuts

Glass-Filled Nylon Hex Nuts

High-Strength Chemical-Resistant PVDF Hex Nuts