M3.5 Nuts | McMaster-Carr

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

DFARS Specialty Metals
Compliant

	Length Length

	Color Color

	Black
	Off-White

	Threading Threading

	Fully Threaded
	Partially Threaded

	Hex Size Hex Size

184 Products

Nuts

Metric Medium-Strength Steel Hex Nuts—Class 8

Class 8 nuts are comparable in strength to Class 8.8 bolts and are suitable for fastening most machinery and equipment.

Metric Low-Strength Steel Hex Nuts

About half the strength of medium-strength steel nuts, these metric nuts are for light duty fastening applications.

Metric 18-8 Stainless Steel Hex Nuts

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

Metric Super-Corrosion-Resistant
316 Stainless Steel Hex Nuts

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

Metric Nylon Hex Nuts

These metric nuts resist oil, grease, and solvents (except mineral acids).

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 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.

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.

Threaded Standoffs

Female Threaded Hex Standoffs

Male-Female Threaded Hex Standoffs

Thread Adapters

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.

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 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.

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.