Black-Oxide Steel Hex Nuts

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Black Oxide

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	Material Material

Stainless Steel

Steel

	Locking Type Locking Type


Nylon Insert	Distorted Thread

Lock Washer	Serrations

Flex-Top

	System of Measurement System of Measurement

Inch

Metric

	Thread Size Thread Size

	Nut Type Nut Type


Cap	Coupling

Flange	Hex

Locknut	Panel

	Hex Nut Profile Hex Nut Profile


Standard	Thin

Extra Wide	Narrow

High	Extra-Wide Thin

	Fastener Strength Grade/Class Fastener Strength Grade/Class

	Thread Direction Thread Direction


Right Hand	Left Hand

	Width Width

	Height Height

	Thread Spacing Thread Spacing

Coarse

Fine

Extra Fine

	Thread Pitch Thread Pitch

	Thread Type Thread Type

	Thread Fit Thread Fit

	Drive Style Drive Style

	External Hex

	Specifications Met Specifications Met

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

RoHS Compliant with
Exemptions

	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

	Flange Diameter Flange Diameter

	Flange Thickness Flange Thickness

	Length Length

1,061 Products

About Nuts, Materials, and Finishes

Medium-Strength Steel Hex Nuts—Grade 5

These nuts are suitable for fastening most machinery and equipment.

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 Fine-Thread Medium-Strength
Steel Hex Nuts—Class 8

High-Strength Steel Hex Nuts—Grade 8

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

Metric High-Strength Steel Hex Nuts—Class 10

About 25% stronger than medium-strength steel nuts, these nuts are comparable in strength to class 10.9 bolts.

Mil. Spec. High-Strength Steel Hex Nuts

Choose these nuts for their adherence to strict military standards for material and construction.

Low-Strength Steel Hex Nuts

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

Metric Low-Strength Steel Hex Nuts

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

18-8 Stainless Steel Hex Nuts

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

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 Fine-Thread 18-8 Stainless Steel Hex Nuts

Super-Corrosion-Resistant 316 Stainless Steel Hex Nuts

These nuts have excellent chemical resistance and can be used in saltwater environments.

Metric Super-Corrosion-Resistant
316 Stainless Steel Hex Nuts

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

Extra-Wide Hex Nuts

Extreme-Strength Steel Extra-Wide Hex Nuts—Grade 2H

These nuts are comparable in strength to Grade 9 bolts.

Low-Strength Steel Extra-Wide Hex Nuts

About half the strength of medium-strength steel extra-wide hex nuts, use these nuts for light duty fastening applications, such as securing access panels.

Extreme-Strength Steel Extra-Wide Hex
Nuts for Structural Applications—Grade DH

High-Strength Steel Extra-Wide Hex Nuts
for Structural Applications—Grade C

Thin Hex Nuts

Low-Strength Steel Thin Hex Nuts

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

Left-Hand Threaded Low-Strength Steel Thin Hex Nuts

These nuts tighten when turned to the left; once fastened, they resist loosening from counterclockwise motion. They’re Grade 2 steel, so they can be used for fastening panels and other light duty fastening applications

18-8 Stainless Steel Thin Hex Nuts

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

Metric 18-8 Stainless Steel Thin Hex Nuts

Useful in low-clearance applications, these metric nuts are roughly half the height of standard hex nuts, but aren’t as strong. All are 18-8 stainless steel, which is nearly as strong as steel but won’t rust in outdoor, washdown, and other corrosive environments.

Metric Fine-Thread 18-8 Stainless Steel Thin Hex Nuts

Made with fine-pitch threads, vibration is less likely to loosen these metric nuts than those with coarse-pitch threads since the threads sit closer together. Also called jam nuts, they are roughly half the height of standard hex nuts, so they’re good for applications with low clearance.

Super-Corrosion-Resistant 316
Stainless Steel Thin Hex Nuts

These nuts have excellent chemical resistance and can be used in saltwater environments.

Narrow Hex Nuts

18-8 Stainless Steel Narrow Hex Nuts

These 18-8 stainless steel nuts have good chemical resistance and may be mildly magnetic.

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.

Steel Narrow Hex Nuts

Also known as small-pattern hex nuts, these are about 20% narrower than standard hex nuts for use in tight spaces where standard hex nuts won't fit.

Low-Strength Steel Extra-Wide Thin Hex Nuts

Use these nuts for light duty fastening applications, such as securing access panels.

Locknuts

High-Strength Steel Nylon-Insert Locknuts—Grade 8

Includes inch thread sizes. These Grade 8 steel locknuts are 25% stronger than our medium-strength steel nylon-insert locknuts.

18-8 Stainless Steel Nylon-Insert Locknuts

These locknuts have good chemical resistance.

Metric Stainless Steel Locknuts
with External-Tooth Lock Washer

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

Metric Steel Nonmarring Locknuts
with Spring-Lock Washer

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.

Steel Nonmarring Locknuts with Spring-Lock Washer

These locknuts have a curved washer that acts as a spring for easy installation and mild vibration resistance. The smooth rim makes them less likely to scratch materials when tightened than locknuts with a tooth lock washer.

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.

Medium-Strength Steel Top-Lock
Distorted-Thread Locknuts—Grade 5

These locknuts have an irregularly shaped thread at the top of the nut that grips the bolt for a stronger hold than nylon-insert 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.

Steel Flex-Top Locknuts for Heavy Vibration

Threads at the top of these locknuts expand to grip the bolt on all sides for a stronger hold than distorted thread locknuts.

Metric Steel Flex-Top Locknuts for Heavy Vibration

Threads at the top of these metric locknuts expand to grip the bolt on all sides for a stronger hold than distorted-thread locknuts.

Stainless Steel Flex-Top Locknuts for Heavy Vibration

Made from 18-8 stainless steel, these flex top locknuts have good chemical resistance and may be mildly magnetic.

Flange Nuts

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.

High-Strength Steel Serrated
Flange Locknuts—Grade 8

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

High-Strength Steel Distorted-Thread Flange Locknuts

These flange locknuts are comparable in strength to Grade 8 bolts.

Stainless Steel Nylon-Insert Flange Locknuts

Metric High-Strength Steel Flange Nuts—Class 10

Also known as collar nuts, these metric nuts have a flange that distributes pressure across the surface, so you don't need a washer. Made of high-strength Class 10 steel, they’re about 25% stronger than medium-strength steel flange nuts.

Low-Strength Steel Flange Nuts

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

Metric Low-Strength Steel Flange Nuts

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

Rotating Flange Nuts

The nut head rotates while the flange remains stationary to prevent scratching the material surface as you tighten the nut.

Steel Leveling Flange Nuts

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

Coupling Nuts

Metric Medium-Strength Steel Coupling Nuts—Class 8

Choose these locknuts to fasten standard metric threads. They’re Class 8 steel, so they can be used in most fastening applications.

Low-Strength Steel Coupling Nuts

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

Metric Low-Strength Steel Coupling Nuts

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

Metric 18-8 Stainless Steel Coupling Nuts

These metric coupling nuts have good chemical resistance.

Steel Extra-Wide High-Hex Cap Nuts

Known for their strength, these steel cap nuts have a black-oxide finish to resist corrosion in dry environments.

Hex Panel Nuts

Steel Hex Panel Nuts

These steel panel nuts are zinc plated for corrosion resistance.

Stainless Steel Hex Panel Nuts

All of these stainless steel panel nuts have some chemical resistance.

Thread Adapters

Inch-to-Inch Male-Female Hex Thread Adapters

Change thread sizes or types, such as fine to coarse threads, on parts without changing gender.

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-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-Inch Female Hex Thread Adapters

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

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-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.

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.

About Nuts, Materials, and Finishes

Hex Nuts

Medium-Strength Steel Hex Nuts—Grade 5

Metric Medium-Strength Steel Hex Nuts—Class 8

Metric Fine-Thread Medium-StrengthSteel Hex Nuts—Class 8

High-Strength Steel Hex Nuts—Grade 8

Metric High-Strength Steel Hex Nuts—Class 10

Mil. Spec. High-Strength Steel Hex Nuts

Low-Strength Steel Hex Nuts

Metric Low-Strength Steel Hex Nuts

18-8 Stainless Steel Hex Nuts

Metric 18-8 Stainless Steel Hex Nuts

Metric Fine-Thread 18-8 Stainless Steel Hex Nuts

Super-Corrosion-Resistant 316 Stainless Steel Hex Nuts

Metric Super-Corrosion-Resistant316 Stainless Steel Hex Nuts

Extra-Wide Hex Nuts

Extreme-Strength Steel Extra-Wide Hex Nuts—Grade 2H

Low-Strength Steel Extra-Wide Hex Nuts

Extreme-Strength Steel Extra-Wide HexNuts for Structural Applications—Grade DH

High-Strength Steel Extra-Wide Hex Nutsfor Structural Applications—Grade C

Thin Hex Nuts

Low-Strength Steel Thin Hex Nuts

Left-Hand Threaded Low-Strength Steel Thin Hex Nuts

18-8 Stainless Steel Thin Hex Nuts

Metric 18-8 Stainless Steel Thin Hex Nuts

Metric Fine-Thread 18-8 Stainless Steel Thin Hex Nuts

Super-Corrosion-Resistant 316Stainless Steel Thin Hex Nuts

Narrow Hex Nuts

18-8 Stainless Steel Narrow Hex Nuts

Super-Corrosion-Resistant 316Stainless Steel Narrow Hex Nuts

Steel Narrow Hex Nuts

Low-Strength Steel Extra-Wide Thin Hex Nuts

Low-Strength Steel Extra-Wide Thin Hex Nuts

Locknuts

High-Strength Steel Nylon-Insert Locknuts—Grade 8

18-8 Stainless Steel Nylon-Insert Locknuts

Metric Stainless Steel Locknutswith External-Tooth Lock Washer

Metric Steel Nonmarring Locknutswith Spring-Lock Washer

Steel Nonmarring Locknuts with Spring-Lock Washer

High-Strength Steel Top-LockDistorted-Thread Locknuts

Medium-Strength Steel Top-LockDistorted-Thread Locknuts—Grade 5

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

Steel Flex-Top Locknuts for Heavy Vibration

Metric Steel Flex-Top Locknuts for Heavy Vibration

Stainless Steel Flex-Top Locknuts for Heavy Vibration

Flange Nuts

Low-Strength Steel Serrated Flange Locknuts

High-Strength Steel SerratedFlange Locknuts—Grade 8

High-Strength Steel Distorted-Thread Flange Locknuts

Stainless Steel Nylon-Insert Flange Locknuts

Metric High-Strength Steel Flange Nuts—Class 10

Low-Strength Steel Flange Nuts

Metric Low-Strength Steel Flange Nuts

Rotating Flange Nuts

Steel Leveling Flange Nuts

Coupling Nuts

Metric Medium-Strength Steel Coupling Nuts—Class 8

Low-Strength Steel Coupling Nuts

Metric Low-Strength Steel Coupling Nuts

Metric 18-8 Stainless Steel Coupling Nuts

Steel Extra-Wide High-Hex Cap Nuts

Steel Extra-Wide High-Hex Cap Nuts

Hex Panel Nuts

Steel Hex Panel Nuts

Stainless Steel Hex Panel Nuts

Thread Adapters

Inch-to-Inch Male-Female Hex Thread Adapters

Inch-to-Metric Male-Female Hex Thread Adapters

Metric-to-Metric Male-Female Hex Thread Adapters

Inch-to-Inch Female Hex Thread Adapters

Left-Hand to Right-Hand Female Hex Thread Adapters

Inch-to-Metric Female Hex Thread Adapters

Metric-to-Metric Female Hex Thread Adapters

Metric-to-Metric Male Hex Thread Adapters

Inch-to-Inch Male Hex Thread Adapters

Inch-to-Metric Male Hex Thread Adapters

Metric Fine-Thread Medium-Strength
Steel Hex Nuts—Class 8

Metric Super-Corrosion-Resistant
316 Stainless Steel Hex Nuts

Extreme-Strength Steel Extra-Wide Hex
Nuts for Structural Applications—Grade DH

High-Strength Steel Extra-Wide Hex Nuts
for Structural Applications—Grade C

Super-Corrosion-Resistant 316
Stainless Steel Thin Hex Nuts

Super-Corrosion-Resistant 316
Stainless Steel Narrow Hex Nuts

Metric Stainless Steel Locknuts
with External-Tooth Lock Washer

Metric Steel Nonmarring Locknuts
with Spring-Lock Washer

High-Strength Steel Top-Lock
Distorted-Thread Locknuts

Medium-Strength Steel Top-Lock
Distorted-Thread Locknuts—Grade 5

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

High-Strength Steel Serrated
Flange Locknuts—Grade 8