System of Measurement

Thread Size

Nut Type

Material

316 Stainless Steel

18-8 Stainless Steel

Black-Oxide 18-8 Stainless Steel

Black-Oxide Steel

Hot-Dipped Galvanized Steel

Nylon 6/6 Plastic

Zinc-Flake-Coated Steel

Zinc-Plated Steel

Thread Direction

Width

Fastener Strength Grade/Class

Thread Pitch

Thread Spacing

Thread Type

Specifications Met

DIN 6334, ASME B18.2.2

Thread Fit

Drive Style

Length

Coupling Nuts

622 Products

Metric 18-8 Stainless Steel Coupling Nuts

Metric 18-8 Stainless Steel Coupling Nuts

These metric coupling nuts have good chemical resistance.

Coupling Nuts with Sight Hole

Coupling Nuts with Sight Hole

Use the sight hole to check for proper thread engagement.

Steel Extra-Long Coupling Nuts

Steel Extra-Long Coupling Nuts

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

Stainless Steel Extra-Long Coupling Nuts

Stainless Steel Extra-Long Coupling Nuts

Stainless steel coupling nuts have excellent corrosion resistance in most environments.

Round Coupling Nuts

Round Coupling Nuts

A smooth rounded body provides a finished look.

Plastic Coupling Nuts

Plastic Coupling Nuts

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

Brass Coupling Nuts

Brass Coupling Nuts

Brass coupling nuts are corrosion resistant in wet environments and electrically conductive.

Aluminum Coupling Nuts

Aluminum Coupling Nuts

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

Metric Super-Corrosion-Resistant316 Stainless Steel Coupling Nuts

Metric Super-Corrosion-Resistant316 Stainless Steel Coupling Nuts

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

Super-Corrosion-Resistant 316Stainless Steel Coupling Nuts

Super-Corrosion-Resistant 316Stainless Steel Coupling Nuts

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

Low-Strength Steel Coupling Nuts

Low-Strength Steel Coupling Nuts

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

18-8 Stainless Steel Coupling Nuts

18-8 Stainless Steel Coupling Nuts

These coupling nuts have good chemical resistance.

Extreme-Strength Steel Coupling Nuts

Extreme-Strength Steel Coupling Nuts

Comparable in strength to Grade 9 bolts, these coupling nuts are about 20% stronger than high-strength steel coupling nuts. Available in inch thread sizes.

Metric High-Strength Steel Coupling Nuts—Class 10

Metric High-Strength Steel Coupling Nuts—Class 10

These metric-sized coupling nuts are Class 10 steel, so they’re about 25% stronger than medium-strength steel coupling nuts.

High-Strength Steel Coupling Nuts—Grade 8

High-Strength Steel Coupling Nuts—Grade 8

Made from Grade 8 steel, these nuts are about 25% stronger than medium-strength steel coupling nuts. Furnished in inch thread sizes.

Metric Medium-Strength Steel Coupling Nuts—Class 8

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.

Medium-Strength Steel Coupling Nuts—Grade 5

Medium-Strength Steel Coupling Nuts—Grade 5

Made from Grade 5 steel, these inch-sized coupling nuts are suitable for most applications.

Left-Hand Threaded Low-Strength Steel Coupling Nuts

Left-Hand Threaded Low-Strength Steel Coupling Nuts

The left-hand threads on these coupling nuts resists loosening from counterclockwise vibration. Use in light duty applications.

Metric Low-Strength Steel Coupling Nuts

Metric Low-Strength Steel Coupling Nuts

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