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About Threaded Studs and Rods
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About Nuts, Materials, and Finishes
More
Metric Low-Strength Steel Threaded Rods
These threaded rods are about half the strength of medium-strength steel threaded rods for light duty hanging, mounting, and fastening.
Zinc-plated steel threaded rods are corrosion resistant in wet environments.
For technical drawings and 3-D models, click on a part number.
| Lg. | Thread Pitch, mm | Tensile Strength, psi | Hardness | Specifications Met | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel | |||||||
|---|---|---|---|---|---|---|---|
M3.5 | |||||||
| 1 m | 0.6 | 50,000 | Rockwell B49 | DIN 976 | 1 | 000000000 | 000000 |
Steel Press-Fit Studs
These steel studs are zinc plated to resist corrosion in wet environments. Press them into a drilled or punched hole with an arbor press or similar pressure tool. Also known as self-clinching studs, ribs under the head hold the stud firmly in place. Length listed is overall length.
For technical drawings and 3-D models, click on a part number.
| Lg., mm | Thread Pitch, mm | PEM® Part Number | Thread Lg., mm | Drill Bit Size | For Min. Material Thick., mm | For Min. Lg. Between Hole Center and Sheet Edge, mm | For Hole Dia., mm | Hole Size Tolerance, mm | Base Dia., mm | Tensile Strength | Hardness | Pkg. Qty. | Pkg. | |
Metric Zinc-Plated Steel | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
M3.5 | ||||||||||||||
| 8 | 0.6 | FH-M3.5-8 | 6 | 3.5 mm | 1.000 | 6.5 | 3.5 | 0.000 to 0.08 | 5.7 | Not Rated | Not Rated | 50 | 000000000 | 000000 |
| 10 | 0.6 | FH-M3.5-10 | 8 | 3.5 mm | 1.000 | 6.5 | 3.5 | 0.000 to 0.08 | 5.7 | Not Rated | Not Rated | 50 | 000000000 | 00000 |
| 12 | 0.6 | FH-M3.5-12 | 10 | 3.5 mm | 1.000 | 6.5 | 3.5 | 0.000 to 0.08 | 5.7 | Not Rated | Not Rated | 25 | 000000000 | 00000 |
Weld Studs
These studs have a wide base that distributes the load and projections that concentrate the weld. Length listed is overall length.
Choose studs with above-head projection to weld the screw directly to the surface of the material for a smoother appearance.
For technical drawings and 3-D models, click on a part number.
Metric Low-Strength Steel Coupling Nuts
Often referred to 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.
Black-oxide steel coupling nuts have a dark surface color and are mildly corrosion resistant in dry environments.
Plastic Coupling Nuts
These nylon 6/6 coupling nuts are chemical resistant, nonconductive, and lightweight. 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.
Temperature Range, °F | Each | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Thread Size | Lg. | Wd. | Threading | Min. | Max. | Color | 1-9 | 10-Up | |
Nylon 6/6 Plastic | |||||||||
| M3.5 | 10mm | 10mm | Fully Threaded | -40° | 250° | Off-White | 0000000 | 00000 | 00000 |
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.
Thread | Each | ||||||
|---|---|---|---|---|---|---|---|
| Size | Pitch, mm | Lg., mm | Wd., mm | Threading | 1-9 | 10-Up | |
Zinc-Plated Steel | |||||||
| M3.5 | 0.6 | 18 | 6 | Fully Threaded | 000000000 | 000000 | 00000 |
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, these adapters have a hex-shaped body, so you can tighten them with a standard wrench. You can also use them to change thread pitch or convert a male-threaded connection to a female-threaded connection. Small adapters can work as threaded standoffs, positioning and separating circuit boards and other components in assemblies.
Adapters that meet ASTM specifications are made from or plated with materials that adhere to specific standards for chemical and physical properties, such as hardness.
Black-oxide steel adapters have a finish that won’t chip or rub off. They match the aesthetics of many systems. They resist rust in indoor and dry environments but will degrade in outdoor and highly corrosive environments.
Zinc-plated steel adapters are a good option in dry environments. The zinc plating prevents the steel from corroding until the plating wears away.
Aluminum adapters are about one third of the weight of steel adapters. They resist corrosion in wet environments.
18-8 stainless steel adapters resist corrosion in wet environments. However, they will corrode when exposed to salt water and other chloride solutions.
For technical drawings and 3-D models, click on a part number.
Thread Size | Thread Lg. | Thread Fit | Hex | Each | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| (A) | Pitch (A), mm | (B) | Pitch (B), mm | (A), mm | (B), mm | (A) | (B) | Size, mm | Lg., mm | Specifications Met | Hardness | 1-9 | 10-Up | |
Black-Oxide Steel | ||||||||||||||
| M3.5 | 0.6 | M2.5 | 0.45 | 9.5 | 4.8 | Class 6H | Class 6H | 6 | 37 | ASTM A108 | Rockwell B85 | 000000000 | 000000 | 00000 |
| M3.5 | 0.6 | M3 | 0.5 | 9.5 | 6.4 | Class 6H | Class 6H | 6 | 37 | ASTM A108 | Rockwell B85 | 000000000 | 00000 | 0000 |
| M3.5 | 0.6 | M4 | 0.7 | 9.5 | 11.1 | Class 6H | Class 6H | 6 | 37 | ASTM A108 | Rockwell B85 | 000000000 | 00000 | 0000 |
Zinc-Plated Steel | ||||||||||||||
| M3.5 | 0.6 | M2.5 | 0.45 | 9.5 | 4.8 | Class 6H | Class 6H | 6 | 37 | ASTM A108, ASTM B633 | Rockwell B85 | 000000000 | 00000 | 0000 |
| M3.5 | 0.6 | M3 | 0.5 | 9.5 | 6.4 | Class 6H | Class 6H | 6 | 37 | ASTM A108, ASTM B633 | Rockwell B85 | 000000000 | 00000 | 0000 |
| M3.5 | 0.6 | M4 | 0.7 | 9.5 | 11.1 | Class 6H | Class 6H | 6 | 37 | ASTM A108, ASTM B633 | Rockwell B85 | 000000000 | 00000 | 0000 |
| M5 | 0.8 | M3.5 | 0.6 | 12.7 | 9.5 | Class 6H | Class 6H | 10 | 50 | ASTM A108, ASTM B633 | Rockwell B85 | 000000000 | 00000 | 0000 |
| M6 | 1 | M3.5 | 0.6 | 16 | 9.5 | Class 6H | Class 6H | 13 | 50 | ASTM A108, ASTM B633 | Rockwell B85 | 000000000 | 00000 | 00000 |
| M8 | 1.25 | M3.5 | 0.6 | 16 | 9.5 | Class 6H | Class 6H | 13 | 50 | ASTM A108, ASTM B633 | Rockwell B85 | 000000000 | 00000 | 00000 |
Aluminum | ||||||||||||||
| M3.5 | 0.6 | M2.5 | 0.45 | 9.5 | 4.8 | Class 6H | Class 6H | 6 | 37 | __ | Rockwell B56 | 000000000 | 0000 | 0000 |
| M3.5 | 0.6 | M3 | 0.5 | 9.5 | 6.4 | Class 6H | Class 6H | 6 | 37 | __ | Rockwell B56 | 000000000 | 0000 | 0000 |
| M3.5 | 0.6 | M4 | 0.7 | 9.5 | 11.1 | Class 6H | Class 6H | 6 | 37 | __ | Rockwell B56 | 000000000 | 0000 | 0000 |
| M5 | 0.8 | M3.5 | 0.6 | 12.7 | 9.5 | Class 6H | Class 6H | 10 | 50 | __ | Rockwell B56 | 000000000 | 0000 | 0000 |
| M6 | 1 | M3.5 | 0.6 | 16 | 9.5 | Class 6H | Class 6H | 13 | 50 | __ | Rockwell B56 | 000000000 | 0000 | 0000 |
| M8 | 1.25 | M3.5 | 0.6 | 16 | 9.5 | Class 6H | Class 6H | 13 | 50 | __ | Rockwell B56 | 000000000 | 0000 | 0000 |
18-8 Stainless Steel | ||||||||||||||
| M3.5 | 0.6 | M2.5 | 0.45 | 9.5 | 4.8 | Class 6H | Class 6H | 6 | 37 | ASTM A582 | Rockwell B80 | 000000000 | 00000 | 0000 |
| M3.5 | 0.6 | M3 | 0.5 | 9.5 | 6.4 | Class 6H | Class 6H | 6 | 37 | ASTM A582 | Rockwell B80 | 000000000 | 00000 | 0000 |
| M3.5 | 0.6 | M4 | 0.7 | 9.5 | 11.1 | Class 6H | Class 6H | 6 | 37 | ASTM A582 | Rockwell B80 | 000000000 | 00000 | 0000 |
| M5 | 0.8 | M3.5 | 0.6 | 12.7 | 9.5 | Class 6H | Class 6H | 10 | 50 | ASTM A582 | Rockwell B80 | 000000000 | 00000 | 00000 |
| M6 | 1 | M3.5 | 0.6 | 16 | 9.5 | Class 6H | Class 6H | 13 | 50 | ASTM A582 | Rockwell B80 | 000000000 | 00000 | 00000 |
| M8 | 1.25 | M3.5 | 0.6 | 16 | 9.5 | Class 6H | Class 6H | 13 | 50 | ASTM A582 | Rockwell B80 | 000000000 | 00000 | 00000 |
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. Small adapters can also be used as standoffs, positioning and separating circuit boards and other components in assemblies.
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 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.
At about a third of the weight of steel adapters, aluminum adapters are the lightest we offer. They resist corrosion in wet environments.
For technical drawings and 3-D models, click on a part number.
Thread Size | Thread Lg. | Thread Fit | Hex | Each | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| (A) | (B) | Pitch (B), mm | (A) | (B), mm | (A) | (B) | Size | Lg. | Specifications Met | Tensile Strength, psi | Hardness | 1-9 | 10-Up | |
Black-Oxide Steel | ||||||||||||||
| 4-40 | M3.5 | 0.6 | 1/4" | 9.5 | Class 2B | Class 6H | 1/4" | 1 1/2" | ASTM A108 | 78,000 | Rockwell B85 | 000000000 | 000000 | 00000 |
| 6-32 | M3.5 | 0.6 | 3/8" | 9.5 | Class 2B | Class 6H | 1/4" | 1 1/2" | ASTM A108 | 78,000 | Rockwell B85 | 000000000 | 00000 | 0000 |
| 1/4"-20 | M3.5 | 0.6 | 5/8" | 9.5 | Class 2B | Class 6H | 1/2" | 2 1/2" | ASTM A108 | 78,000 | Rockwell B85 | 000000000 | 00000 | 00000 |
Zinc-Plated Steel | ||||||||||||||
| 2-56 | M3.5 | 0.6 | 0.187" | 9.5 | Class 2B | Class 6H | 1/4" | 1 1/2" | ASTM A108, ASTM B633 | 78,000 | Rockwell B85 | 000000000 | 00000 | 0000 |
| 4-40 | M3.5 | 0.6 | 1/4" | 9.5 | Class 2B | Class 6H | 1/4" | 1 1/2" | ASTM A108, ASTM B633 | 78,000 | Rockwell B85 | 000000000 | 00000 | 0000 |
| 6-32 | M3.5 | 0.6 | 3/8" | 9.5 | Class 2B | Class 6H | 1/4" | 1 1/2" | ASTM A108, ASTM B633 | 78,000 | Rockwell B85 | 000000000 | 00000 | 0000 |
| 8-32 | M3.5 | 0.6 | 0.437" | 9.5 | Class 2B | Class 6H | 1/4" | 1 1/2" | ASTM A108, ASTM B633 | 78,000 | Rockwell B85 | 000000000 | 00000 | 0000 |
| 10-32 | M3.5 | 0.6 | 1/2" | 9.5 | Class 2B | Class 6H | 3/8" | 2" | ASTM A108, ASTM B633 | 78,000 | Rockwell B85 | 000000000 | 00000 | 0000 |
| 1/4"-20 | M3.5 | 0.6 | 5/8" | 9.5 | Class 2B | Class 6H | 1/2" | 2 1/2" | ASTM A108, ASTM B633 | 78,000 | Rockwell B85 | 000000000 | 00000 | 0000 |
| 5/16"-18 | M3.5 | 0.6 | 5/8" | 9.5 | Class 2B | Class 6H | 1/2" | 2 1/2" | ASTM A108, ASTM B633 | 78,000 | Rockwell B85 | 000000000 | 00000 | 00000 |
18-8 Stainless Steel | ||||||||||||||
| 2-56 | M3.5 | 0.6 | 0.187" | 9.5 | Class 2B | Class 6H | 1/4" | 1 1/2" | ASTM A582 | 85,000 | Rockwell B80 | 000000000 | 00000 | 0000 |
| 4-40 | M3.5 | 0.6 | 1/4" | 9.5 | Class 2B | Class 6H | 1/4" | 1 1/2" | ASTM A582 | 85,000 | Rockwell B80 | 000000000 | 00000 | 0000 |
| 6-32 | M3.5 | 0.6 | 3/8" | 9.5 | Class 2B | Class 6H | 1/4" | 1 1/2" | ASTM A582 | 85,000 | Rockwell B80 | 000000000 | 00000 | 0000 |
| 8-32 | M3.5 | 0.6 | 0.437" | 9.5 | Class 2B | Class 6H | 1/4" | 1 1/2" | ASTM A582 | 85,000 | Rockwell B80 | 000000000 | 00000 | 0000 |
| 10-32 | M3.5 | 0.6 | 1/2" | 9.5 | Class 2B | Class 6H | 3/8" | 2" | ASTM A582 | 85,000 | Rockwell B80 | 000000000 | 00000 | 00000 |
| 1/4"-20 | M3.5 | 0.6 | 5/8" | 9.5 | Class 2B | Class 6H | 1/2" | 2 1/2" | ASTM A582 | 85,000 | Rockwell B80 | 000000000 | 00000 | 00000 |
| 5/16"-18 | M3.5 | 0.6 | 5/8" | 9.5 | Class 2B | Class 6H | 1/2" | 2 1/2" | ASTM A582 | 85,000 | Rockwell B80 | 000000000 | 00000 | 00000 |
Aluminum | ||||||||||||||
| 4-40 | M3.5 | 0.6 | 1/4" | 9.5 | Class 2B | Class 6H | 1/4" | 1 1/2" | __ | 45,000 | Rockwell B56 | 000000000 | 0000 | 0000 |
| 6-32 | M3.5 | 0.6 | 3/8" | 9.5 | Class 2B | Class 6H | 1/4" | 1 1/2" | __ | 45,000 | Rockwell B56 | 000000000 | 0000 | 0000 |
| 10-32 | M3.5 | 0.6 | 1/2" | 9.5 | Class 2B | Class 6H | 3/8" | 2" | __ | 45,000 | Rockwell B56 | 000000000 | 0000 | 0000 |
| 1/4"-20 | M3.5 | 0.6 | 5/8" | 9.5 | Class 2B | Class 6H | 1/2" | 2 1/2" | __ | 45,000 | Rockwell B56 | 000000000 | 0000 | 0000 |
| 5/16"-18 | M3.5 | 0.6 | 5/8" | 9.5 | Class 2B | Class 6H | 1/2" | 2 1/2" | __ | 45,000 | Rockwell B56 | 000000000 | 0000 | 0000 |