System of Measurement System of Measurement |
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Thread Size Thread Size | Show |
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Thread Size Thread Size | Hide |
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Material Material |
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Threading Threading |
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 | Fully Threaded |
 | Partially Threaded |
Thread Direction Thread Direction |
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| Right Hand | Left Hand |
Drive Style Drive Style |
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Thread Fit Thread Fit |
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Thread Spacing Thread Spacing |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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Thread Type Thread Type |
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Gender Gender |
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 | Female |
For Adapting For Adapting |
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Shape Shape |
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Tensile Strength Tensile Strength |
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Coupling Nut Profile Coupling Nut Profile |
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Hardness Hardness |
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About Nuts, Materials, and Finishes
More
Inch-to-Inch Female Hex Thread Adapters
Connect two differently sized male-threaded parts, such as threaded rods, and tighten with a standard wrench. The threads on these adapters have various sizes and spacing, so you can increase or decrease thread size or adapt from coarse to fine threading. You can also use them to change the gender of a connection from male to female. Small adapters can work as threaded standoffs, which position and separate circuit boards and other components in assemblies.
Zinc-plated steel adapters are a good option in dry environments. The zinc plating prevents the steel from corroding until the plating wears away.
18-8 stainless steel adapters resist corrosion caused by water. They're good for wet and damp environments but will corrode when exposed to salt water and other chloride solutions.
316 stainless steel adapters have the best corrosion resistance. They stand up to wet environments, just like 18-8 stainless steel adapters, but unlike 18-8 stainless steel adapters, they resist corrosion caused by salt water and harsh chemicals.
For technical drawings and 3-D models, click on a part number.
Thread Size | Thread Lg. | Thread Fit | Hex | Each | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| (A) | (B) | (A) | (B) | (A) | (B) | Size | Lg. | Specifications Met | Hardness | 1-9 | 10-Up | |
Zinc-Plated Steel | ||||||||||||
| 5/8"-11 | 7/8"-9 | 5/8" | 3/4" | Class 2B | Class 2B | 1 1/4" | 1 3/4" | ASTM A108, ASTM B633 | Rockwell B65 | 000000000 | 00000 | 00000 |
| 3/4"-10 | 7/8"-9 | 3/4" | 3/4" | Class 2B | Class 2B | 1 1/4" | 1 3/4" | ASTM A108, ASTM B633 | Rockwell B65 | 000000000 | 0000 | 0000 |
| 7/8"-9 | 1"-8 | 7/8" | 1" | Class 2B | Class 2B | 1 3/8" | 2" | ASTM A108, ASTM B633 | Rockwell B65 | 000000000 | 0000 | 0000 |
| 7/8"-9 | 1 1/4"-7 | 7/8" | 1 1/16" | Class 2B | Class 2B | 1 5/8" | 3" | ASTM A108, ASTM B633 | Rockwell B65 | 000000000 | 00000 | 00000 |
18-8 Stainless Steel | ||||||||||||
| 5/8"-11 | 7/8"-9 | 5/8" | 7/8" | Class 2B | Class 2B | 1 1/4" | 2" | ASTM A582 | Rockwell B80 | 000000000 | 00000 | 00000 |
| 3/4"-10 | 7/8"-9 | 3/4" | 7/8" | Class 2B | Class 2B | 1 1/4" | 2 1/4" | ASTM A582 | Rockwell B80 | 000000000 | 00000 | 00000 |
| 7/8"-9 | 1"-8 | 7/8" | 1" | Class 2B | Class 2B | 1 3/8" | 2" | ASTM A582 | Rockwell B80 | 000000000 | 00000 | 00000 |
| 7/8"-9 | 1 1/4"-7 | 7/8" | 1 1/16" | Class 2B | Class 2B | 1 5/8" | 3" | ASTM A582 | Rockwell B80 | 000000000 | 00000 | 00000 |
316 Stainless Steel | ||||||||||||
| 5/8"-11 | 7/8"-9 | 5/8" | 7/8" | Class 2B | Class 2B | 1 1/4" | 2" | ASTM A276 | Rockwell B83 | 000000000 | 00000 | 00000 |
| 3/4"-10 | 7/8"-9 | 3/4" | 7/8" | Class 2B | Class 2B | 1 1/4" | 2 1/4" | ASTM A276 | Rockwell B83 | 000000000 | 00000 | 00000 |
| 7/8"-9 | 1"-8 | 7/8" | 1" | Class 2B | Class 2B | 1 3/8" | 2" | ASTM A276 | Rockwell B83 | 000000000 | 00000 | 00000 |
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.
Choose black-oxide steel adapters to match the aesthetics of your system or for their mild corrosion resistance. The finish won't chip or rub off. They resist rust in indoor and dry environments, but avoid using them in corrosive environments.
Zinc-plated steel adapters are strong and corrosion resistant.
At about a third of the weight of steel adapters, aluminum adapters are the lightest we offer. They resist corrosion in wet environments.
18-8 stainless steel adapters have good corrosion resistance.
Black-oxide 18-8 stainless steel adapters have a black finish that won’t chip or rub off.
316 stainless steel adapters have the best corrosion resistance. They stand up to wet environments, just like 18-8 stainless steel adapters, but unlike 18-8 stainless steel adapters, they resist corrosion caused by salt water and harsh chemicals.
For technical drawings and 3-D models, click on a part number.
Thread Size | Thread Lg. | Thread Fit | Hex | Each | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| (A) | (B) | (A) | (B) | (A) | (B) | Size | Lg. | Hardness | 1-9 | 10-Up | |
Black-Oxide Steel | |||||||||||
| 7/8"-9 | 7/8"-9 | 1 1/2" | 1 1/2" | Class 2B | Class 2B | 1 3/8" | 5" | Rockwell B80 | 000000000 | 000000 | 000000 |
Zinc-Plated Steel | |||||||||||
| 7/8"-9 | 7/8"-9 | 3 1/4" | 3 1/4" | Class 2B | Class 2B | 1 3/8" | 7" | Rockwell B65 | 000000000 | 00000 | 00000 |
Aluminum | |||||||||||
| 7/8"-9 | 7/8"-9 | 1 1/2" | 1 1/2" | Class 2B | Class 2B | 1 3/8" | 5" | Rockwell B56 | 000000000 | 00000 | 00000 |
18-8 Stainless Steel | |||||||||||
| 7/8"-9 | 7/8"-9 | 1 1/2" | 1 1/2" | Class 2B | Class 2B | 1 3/8" | 5" | Rockwell B80 | 000000000 | 00000 | 00000 |
Black-Oxide 18-8 Stainless Steel | |||||||||||
| 7/8"-9 | 7/8"-9 | 1 1/2" | 1 1/2" | Class 2B | Class 2B | 1 3/8" | 5" | Rockwell B80 | 000000000 | 00000 | 00000 |
316 Stainless Steel | |||||||||||
| 7/8"-9 | 7/8"-9 | 1 1/2" | 1 1/2" | Class 2B | Class 2B | 1 3/8" | 5" | Rockwell B80 | 000000000 | 00000 | 00000 |
18-8 Stainless Steel Coupling Nuts
These coupling nuts have good chemical resistance and may be mildly magnetic. Also known as extension nuts, use them to connect and extend threaded rods.
For technical drawings and 3-D models, click on a part number.
Each | |||||
|---|---|---|---|---|---|
| Thread Size | Lg. | Wd. | 1-9 | 10-Up | |
18-8 Stainless Steel | |||||
| 7/8"-9 | 2 1/2" | 1 1/4" | 000000000 | 000000 | 000000 |
Super-Corrosion-Resistant 316 Stainless Steel Coupling Nuts
These coupling nuts have excellent resistance to chemicals and salt water. Also known as extension nuts, use them to connect and extend threaded rods. They may be mildly magnetic.
For technical drawings and 3-D models, click on a part number.
Each | |||||
|---|---|---|---|---|---|
| Thread Size | Lg. | Wd. | 1-9 | 10-Up | |
316 Stainless Steel | |||||
| 7/8"-9 | 2 1/2" | 1 1/4" | 000000000 | 000000 | 000000 |
Low-Strength Steel Coupling Nuts
Also known as extension nuts, use these to connect and extend threaded rods. They're about half the strength of medium-strength steel coupling nuts for use in light duty fastening applications.
Zinc-plated steel coupling nuts resist corrosion in wet environments.
Hot-dipped galvanized steel coupling nuts have a thick coating for better corrosion resistance than zinc-plated steel nuts. They must be used with other hot-dipped galvanized fasteners.
Zinc-aluminum-coated steel coupling nuts are 40 times as corrosion resistant as zinc-plated steel coupling nuts and are comparable to Magni-coated nuts. They meet ASTM B117, which means they withstand 1,000 hours of salt spray.
Black-oxide steel coupling nuts have a dark surface color and are mildly corrosion resistant in dry environments.
For technical drawings and 3-D models, click on a part number.
Each | |||||
|---|---|---|---|---|---|
| Thread Size | Lg. | Wd. | 1-9 | 10-Up | |
Zinc-Plated Steel | |||||
| 7/8"-9 | 2 1/2" | 1 1/4" | 000000000 | 00000 | 00000 |
Hot-Dipped Galvanized Steel | |||||
| 7/8"-9 | 2 1/2" | 1 1/4" | 000000000 | 00000 | 0000 |
Zinc-Aluminum Coated Steel | |||||
| 7/8"-9 | 2 1/2" | 1 1/4" | 000000000 | 00000 | 00000 |
Black-Oxide Steel | |||||
| 7/8"-9 | 2 1/4" | 1 7/16" | 000000000 | 00000 | 0000 |
| 7/8"-9 | 2 1/2" | 1 1/4" | 000000000 | 00000 | 00000 |
Left-Hand Threaded Low-Strength Steel Coupling Nuts
These coupling nuts tighten when turned to the left. Also known as extension nuts, use them to connect and extend threaded rods. They're made from low-strength steel for use them in light-duty fastening applications. A zinc plating provides corrosion resistance in wet environments.
For technical drawings and 3-D models, click on a part number.
Each | |||||
|---|---|---|---|---|---|
| Thread Size | Lg. | Wd. | 1-9 | 10-Up | |
Zinc-Plated Steel | |||||
| 7/8"-9 | 2 1/2" | 1 1/4" | 000000000 | 00000 | 00000 |
Medium-Strength Steel Coupling Nuts—Grade 5
Also known as extension nuts, use these to connect and extend threaded rods.
Zinc-plated steel coupling nuts resist corrosion in wet environments.
For technical drawings and 3-D models, click on a part number.
Each | |||||
|---|---|---|---|---|---|
| Thread Size | Lg. | Wd. | 1-9 | 10-Up | |
Zinc-Plated Steel—Grade 5 | |||||
| 7/8"-9 | 2 1/2" | 1 1/4" | 000000000 | 000000 | 000000 |
High-Strength Steel Coupling Nuts—Grade 8
Also known as extension nuts, use these to connect and extend threaded rods. Made from Grade 8 steel, they're about 25% stronger than medium-strength steel coupling nuts. A zinc plating provides corrosion resistance in wet environments.
For technical drawings and 3-D models, click on a part number.
Each | |||||
|---|---|---|---|---|---|
| Thread Size | Lg. | Wd. | 1-9 | 10-Up | |
Zinc-Plated Steel—Grade 8 | |||||
| 7/8"-9 | 2 1/2" | 1 5/16" | 000000000 | 000000 | 000000 |
Extreme-Strength Steel Coupling Nuts
Also known as extension nuts, use these to connect and extend threaded rods. Made from Grade 2H steel, they're about 20% stronger than high-strength steel coupling nuts and comparable in strength to Grade 9 bolts.
For technical drawings and 3-D models, click on a part number.
Each | |||||
|---|---|---|---|---|---|
| Thread Size | Lg. | Wd. | 1-9 | 10-Up | |
Steel—Grade 2H | |||||
| 7/8"-9 | 2 1/2" | 1 1/2" | 000000000 | 000000 | 000000 |
Brass Coupling Nuts
These coupling nuts are corrosion resistant in wet environments, electrically conductive, and nonmagnetic. Also known as extension nuts, use them to connect and extend threaded rods.
For technical drawings and 3-D models, click on a part number.
Each | |||||
|---|---|---|---|---|---|
| Thread Size | Lg. | Wd. | 1-9 | 10-Up | |
Brass | |||||
| 7/8"-9 | 2 1/2" | 1 1/4" | 000000000 | 000000 | 000000 |
Aluminum Coupling Nuts
One-third the weight of steel, these aluminum coupling nuts are corrosion resistant in wet environments and nonmagnetic. Also known as extension nuts, use them to connect and extend threaded rods.
For technical drawings and 3-D models, click on a part number.
Thread | Each | ||||
|---|---|---|---|---|---|
| Size | Lg. | Wd. | 1-9 | 10-Up | |
6061 Aluminum | |||||
| 7/8"-9 | 2 1/2" | 1 1/4" | 000000000 | 000000 | 000000 |
Steel Extra-Long Coupling Nuts
Also known as sleeve nuts, these are at least twice the length of standard coupling nuts to provide more room to connect and extend long lengths of threaded rods.
Zinc-plated steel nuts resist corrosion in wet environments.
For technical drawings and 3-D models, click on a part number.
Each | ||||||
|---|---|---|---|---|---|---|
| Thread Size | Lg. | Wd. | Threading | 1-9 | 10-Up | |
Zinc-Plated Steel | ||||||
| 7/8"-9 | 7" | 1 3/8" | Partially Threaded | 000000000 | 000000 | 000000 |