Aluminum Nuts | McMaster-Carr

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	Material Material

Aluminum

Brass

Steel

	Finish Finish

Aluminum Plated

Black Anodized

Black Ultra-Corrosion-
Resistant Coated

Cadmium Plated

Tin-Zinc Plated

Yellow-Chromate Plated

Zinc-Aluminum Coated

	System of Measurement System of Measurement

Inch

Metric

	Thread Size Thread Size

	Nut Type Nut Type


Cap	Coupling

Flange	Hex

Locknut	Rivet

Square	Tamper Resistant

Threadless

	Hex Nut Profile Hex Nut Profile


Standard	Thin

	Width Width

	Fastener Strength Grade/Class Fastener Strength Grade/Class


Grade 8	Grade C

	Thread Direction Thread Direction

	Right Hand
	Right Hand and Left Hand

	Height Height

	Thread Spacing Thread Spacing

Coarse

Fine

Extra Fine

	Thread Type Thread Type

	Thread Pitch Thread Pitch

	Length Length

	Thread Fit Thread Fit

	Drive Style Drive Style


External Hex	Serrated Edge

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

DFARS Specialty Metals
COTS-Exempt

DFARS Specialty Metals
Compliant

	Body Type Body Type


Ribbed	Sleeve

Smooth

	Specifications Met Specifications Met

	Locking Type Locking Type


Nylon Insert	Serrations

Distorted Thread

	For Tube Material For Tube Material

Aluminum

	Nut Material Nut Material

Aluminum

	Terminal Material Terminal Material

Aluminum

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2,445 Products

Nuts

High-Strength Steel Hex Nuts—Grade 8

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

Aluminum Hex Nuts

One-third the weight of steel, these aluminum nuts are corrosion resistant in wet environments and nonmagnetic.

Metric Aluminum Hex Nuts

One-third the weight of steel, these metric aluminum nuts are corrosion resistant in wet environments and nonmagnetic.

High-Strength Steel Thin Hex Nuts—Grade 8

These nuts are about 25% stronger than medium-strength steel thin hex nuts. Available in inch thread sizes.

Aluminum Thin Hex Nuts

One-third the weight of steel, aluminum nuts resist corrosion in wet environments.

Aluminum Nylon-Insert Locknuts

One-third the weight of steel, aluminum locknuts resist corrosion in wet environments.

High-Strength Steel Top-Lock
Distorted-Thread Locknuts

Comparable in strength to Grade 8 bolts, these locknuts are about 25% stronger than medium-strength steel locknuts.

High-Strength Steel Center-Lock
Distorted-Thread Locknuts—Grade 8

These Grade 8 locknuts are about three times stronger than low-strength steel distorted-thread locknuts.

Low-Strength Steel Serrated Flange Locknuts

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

Aluminum Cap Nuts

One-third the weight of steel, aluminum cap nuts resist corrosion in wet environments.

Low-Strength Steel Coupling Nuts

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

Aluminum Coupling Nuts

One-third the weight of steel, aluminum coupling nuts resist corrosion in wet environments.

Aluminum Twist-Resistant Rivet Nuts

These aluminum rivet nuts are one-third the weight of steel rivet nuts and have mild corrosion resistance.

Twist-Resistant Rivet Nuts for Soft Materials

Wedges under the flange lock the nut in place in soft materials such as brass and aluminum.

Aluminum Low-Profile Rivet Nuts

These low-profile rivet nuts are one-third the weight of steel and have mild corrosion resistance.

Aluminum Rivet Nuts

These aluminum rivet nuts are one-third the weight of steel rivet nuts and have mild corrosion resistance.

Flange-Sealing Rivet Nuts

A PVC foam seal under the flange keeps liquids and gasses from leaking between the nut and the surrounding material.

Tamper-Resistant Breakaway Nuts

The most tamper-resistant nuts we offer, these have a hex head that breaks away upon tightening, leaving a non-removable cone. Install with a standard wrench.

Tamper-Resistant Serrated-Edge Locknuts

These nuts have serrations that dig into the material surface to resist loosening and are narrow to fit in tight spaces. Install with a serrated-edge driver.

Low-Profile Binding Barrels and Screws

Aluminum Low-Profile Binding Barrels and Screws

One-third the weight of steel, aluminum binding barrels and screws resist corrosion in wet environments.

Extensions for Low-Profile Binding Barrels

Add length to a binding barrel.

Metal Press-Fit Low-Profile Binding Barrels and Caps

These barrels and caps are corrosion resistant in wet environments.

Threaded Standoffs

Female Threaded Hex Standoffs

Male-Female Threaded Hex Standoffs

Female Threaded Round Standoffs

Thread Adapters

Inch-to-Inch Male-Female Hex Thread Adapters

Join threads with small diameters to large or course threads to fine with these inch-sized 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-Inch Female Hex Thread Adapters

Connect two differently sized male-threaded parts, such as threaded rods, and tighten with 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.

Left-Hand to Right-Hand Female Hex Thread Adapters

Often called sleeve nuts, these thread adapters fasten parts with right-hand threads to parts with left-hand threads.

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.

Inch-to-Inch Male Hex Thread Adapters

Need to join two female-threaded parts, such as coupling nuts, with dissimilar inch thread sizes? Attach them to these adapters and tighten the exterior hex nut for a secure connection.

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.

Rivet Nut Assortments

These rivet nuts have a smooth body and fit in smaller holes than twist-resistant rivet nuts. Assortments include rivet nuts, mandrels, nosepieces, and a plier-style installation tool.

Lead Screws and Screw Jacks

Self-Reversing Lead Screws and Nuts

A crisscross thread pattern allows you to drive the nut back and forth without changing the lead screw's direction of rotation. When the nut reaches one end of the lead screw, it changes direction and travels back to the other end.

Threadless Lead Screw Nuts

Install these nuts on a rotary shaft to create a linear positioning system without a lead screw. Instead of threads, a set of angled ball bearings drives the nut along a shaft as it spins.

Pipe, Tubing, Hose, and Fittings

Low-Pressure Aluminum Threaded Pipe Fittings

In addition to being lightweight, these aluminum fittings offer good corrosion resistance. Use them in low-pressure flow applications.

Nuts for 37° Flared Fittings for Aluminum Tubing

Nuts for High-Pressure Nipples for Compressed Gas

These nuts attach to high-pressure nipples for compressed gas so you can connect your tank to the inlet of a pressure regulator.

Structural Framing

Strut Channel Nuts

Serrated grooves grip the lip of the channel.

Strut Channel Nuts with Springs

A spring plus serrated grooves that grip the lip of the channel provide a more secure hold than standard strut channel nuts.

Miniature T-Slotted Framing and Fittings

Build test fixtures, prototypes, and other small structures with this miniature version of T-slotted framing and fittings.

Clamping and Workholding

T-Slot Covers

Prevent chips, debris, and small parts from falling into T-slots.

T-Slot Blocks

Mount these versatile blocks to any flat surface for machine table-style T-slot clamping. They can also be used on a machine table to clamp parts at specific angles or add more total clamping points.

Electrical

Locknuts for Metal Conduit Fittings

Secure threaded metal conduit fittings to a knockout in an outlet box or enclosure.

Screw-Down Split-Bolt Splices

Splice large size wires without special tools—insert your wires and tighten the hex nut to make a connection.

Loop Clamps

Snug-Fit Vibration-Damping Loop Clamps

A molded cushion reduces vibration and wear from clamp edges, plus it provides a tighter fit around material than standard vibration-damping loop clamps.

Loop Clamps

These clamps completely surround single lines of pipe, tubing, and conduit while holding them close to the mounting surface.

Nuts

High-Strength Steel Hex Nuts—Grade 8

Aluminum Hex Nuts

Metric Aluminum Hex Nuts

High-Strength Steel Thin Hex Nuts—Grade 8

Aluminum Thin Hex Nuts

Aluminum Nylon-Insert Locknuts

High-Strength Steel Top-LockDistorted-Thread Locknuts

High-Strength Steel Center-LockDistorted-Thread Locknuts—Grade 8

Low-Strength Steel Serrated Flange Locknuts

Aluminum Cap Nuts

Low-Strength Steel Coupling Nuts

Aluminum Coupling Nuts

Aluminum Twist-Resistant Rivet Nuts

Twist-Resistant Rivet Nuts for Soft Materials

Aluminum Low-Profile Rivet Nuts

Aluminum Rivet Nuts

Flange-Sealing Rivet Nuts

Tamper-Resistant Breakaway Nuts

Tamper-Resistant Serrated-Edge Locknuts

Low-Profile Binding Barrels and Screws

Aluminum Low-Profile Binding Barrels and Screws

Extensions for Low-Profile Binding Barrels

Metal Press-Fit Low-Profile Binding Barrels and Caps

Threaded Standoffs

Female Threaded Hex Standoffs

Male-Female Threaded Hex Standoffs

Female Threaded Round Standoffs

Thread Adapters

Inch-to-Inch Male-Female Hex Thread Adapters

Metric-to-Metric Male-Female Hex Thread Adapters

Inch-to-Metric Male-Female Hex Thread Adapters

Inch-to-Inch Female Hex Thread Adapters

Metric-to-Metric Female Hex Thread Adapters

Left-Hand to Right-Hand Female Hex Thread Adapters

Inch-to-Metric Female Hex Thread Adapters

Inch-to-Inch Male Hex Thread Adapters

Metric-to-Metric Male Hex Thread Adapters

Inch-to-Metric Male Hex Thread Adapters

Rivet Nut Assortments

Rivet Nut Assortments

Lead Screws and Screw Jacks

Self-Reversing Lead Screws and Nuts

Threadless Lead Screw Nuts

Pipe, Tubing, Hose, and Fittings

Low-Pressure Aluminum Threaded Pipe Fittings

Nuts for 37° Flared Fittings for Aluminum Tubing

Nuts for High-Pressure Nipples for Compressed Gas

Structural Framing

Strut Channel Nuts

Strut Channel Nuts with Springs

Miniature T-Slotted Framing and Fittings

Clamping and Workholding

T-Slot Covers

T-Slot Blocks

Electrical

Locknuts for Metal Conduit Fittings

Screw-Down Split-Bolt Splices

Loop Clamps

Snug-Fit Vibration-Damping Loop Clamps

Loop Clamps

High-Strength Steel Top-Lock
Distorted-Thread Locknuts

High-Strength Steel Center-Lock
Distorted-Thread Locknuts—Grade 8