About Nuts, Materials, and Finishes
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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 | |||||
| 3/4"-16 | 2 1/4" | 1" | 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 | |||||
| 3/4"-16 | 2 1/4" | 1" | 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.
For technical drawings and 3-D models, click on a part number.
Each | |||||
|---|---|---|---|---|---|
| Thread Size | Lg. | Wd. | 1-9 | 10-Up | |
Zinc-Plated Steel | |||||
| 3/4"-16 | 2 1/4" | 1" | 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 | |||||
| 3/4"-16 | 2 1/4" | 1" | 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 | |||||
| 3/4"-16 | 2 1/4" | 1 1/8" | 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 | |||||
| 3/4"-16 | 2 1/4" | 1" | 000000000 | 000000 | 000000 |
Stainless Steel Extra-Long Coupling Nuts
These coupling nuts have good chemical resistance. Also known as sleeve nuts, they're at least twice the length of standard coupling nuts to provide more room to connect and extend long lengths of threaded rods.
For technical drawings and 3-D models, click on a part number.
Round Coupling Nuts
With a smooth rounded body for a finished look, use these nuts to connect and extend threaded rods.
Black-oxide steel coupling nuts have mild corrosion resistance.
18-8 stainless steel coupling nuts have good chemical resistance.
316 stainless steel coupling nuts have excellent resistance to chemicals and salt water.
For technical drawings and 3-D models, click on a part number.
Thread | Each | |||||
|---|---|---|---|---|---|---|
| Size | Lg. | OD | Specifications Met | 1-9 | 10-Up | |
Black-Oxide Steel | ||||||
| 3/4"-16 | 1 1/4" | 63/64" | ASTM A108 | 000000000 | 000000 | 000000 |
| 3/4"-16 | 1 1/2" | 63/64" | ASTM A108 | 000000000 | 00000 | 00000 |
| 3/4"-16 | 2" | 63/64" | ASTM A108 | 000000000 | 00000 | 00000 |
18-8 Stainless Steel | ||||||
| 3/4"-16 | 2" | 63/64" | ASTM A582 | 000000000 | 00000 | 00000 |
316 Stainless Steel | ||||||
| 3/4"-16 | 1 1/4" | 63/64" | ASTM A276 | 000000000 | 00000 | 00000 |
| 3/4"-16 | 1 1/2" | 63/64" | ASTM A276 | 000000000 | 00000 | 00000 |
Steel High Hex Nuts
With a height that is taller than standard hex nuts, these nuts provide a larger gripping area for installation with a wrench.
For technical drawings and 3-D models, click on a part number.
| Thread Size | Wd. | Ht. | Specifications Met | Pkg. Qty. | Pkg. | |
Steel—Grade 8 | ||||||
|---|---|---|---|---|---|---|
| 3/4"-16 | 1 1/8" | 1" | SAE J995 | 10 | 000000000 | 000000 |
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.
18-8 stainless steel adapters withstand wet environments but will corrode when exposed to salt water and other chloride solutions.
316 stainless steel adapters are ideal in wet environments and will not corrode when exposed to salt water or harsh chemicals.
Aluminum adapters are about one third of the weight of steel adapters and resist corrosion in wet environments.
Adapters that meet ASTM specifications are made from or plated with materials that adhere to standards for chemical and physical properties, such as hardness.
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 | |
18-8 Stainless Steel | ||||||||||||
| 3/4"-10 | 3/4"-16 | 3/4" | 3/4" | Class 2B | Class 2B | 1 1/4" | 2" | ASTM A582 | Rockwell B80 | 000000000 | 000000 | 000000 |
316 Stainless Steel | ||||||||||||
| 3/4"-10 | 3/4"-16 | 3/4" | 3/4" | Class 2B | Class 2B | 1 1/4" | 2" | ASTM A276 | Rockwell B83 | 000000000 | 00000 | 00000 |
Aluminum | ||||||||||||
| 3/4"-10 | 3/4"-16 | 3/4" | 3/4" | Class 2B | Class 2B | 1 1/4" | 2" | ASTM B211 | Rockwell B56 | 000000000 | 00000 | 00000 |