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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Length Length |
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Threading Threading |
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 | Fully Threaded |
 | Partially Threaded |
Material Material |
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Thread Direction Thread Direction |
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 | Right Hand |
Thread Spacing Thread Spacing |
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Drive Style Drive Style |
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| External Hex | Hex |
Thread Type Thread Type |
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Tensile Strength Tensile Strength |
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Socket Head Profile Socket Head Profile |
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Body Style Body Style |
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| Without Shoulder | With Shoulder |
About Nuts, Materials, and Finishes
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About Threaded Studs and Rods
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How to Identify and Measure Fittings
Pipe size is an industry designation, not the actual size. View information about how to measure threaded and unthreaded pipe and pipe fittings.
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About Hex Head Screws and Bolts
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About Socket Head Screws
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High-Strength Grade 8 Steel Hex Head Screws
Made from Grade 8 steel, these screws can be used in high-stress applications, such as valves, pumps, motors, and automotive suspension systems. They are at least 25% stronger than medium-strength steel screws. Grade 8 steel hex head screws are marked with six radial lines. Length is measured from under the head.
Zinc yellow-chromate plated steel screws resist corrosion in wet environments. Match the thread spacing of mating components. Fine and extra-fine threads are closely spaced to prevent loosening from vibration; the finer the thread, the better the resistance.
Screws that meet ASTM A354BD or SAE J429 comply with specifications and testing requirements for material quality. Screws that meet ASME B18.2.1 or ASME B18.6.3 comply with specifications for dimensional standards.
For technical drawings and 3-D models, click on a part number.
Head | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Threading | Min. Thread Lg. | Thread Spacing | Wd. | Ht. | Tensile Strength, psi | Specifications Met | Pkg. Qty. | Pkg. | |
Zinc Yellow-Chromate Plated Grade 8 Steel | ||||||||||
9/16"-18 | ||||||||||
| 1" | Fully Threaded | __ | Fine | 13/16" | 23/64" | 150,000 | ASME B18.2.1, SAE J429 | 10 | 000000000 | 00000 |
| 1 1/4" | Fully Threaded | __ | Fine | 13/16" | 23/64" | 150,000 | ASME B18.2.1, SAE J429 | 10 | 000000000 | 0000 |
| 1 1/2" | Fully Threaded | __ | Fine | 13/16" | 23/64" | 150,000 | ASME B18.2.1, SAE J429 | 10 | 000000000 | 00000 |
| 2" | Fully Threaded | __ | Fine | 13/16" | 23/64" | 150,000 | ASME B18.2.1, SAE J429 | 10 | 000000000 | 00000 |
| 3" | Partially Threaded | 1 3/8" | Fine | 13/16" | 23/64" | 150,000 | ASME B18.2.1, SAE J429 | 5 | 000000000 | 0000 |
| 3 1/2" | Partially Threaded | 1 3/8" | Fine | 13/16" | 23/64" | 150,000 | ASME B18.2.1, SAE J429 | 5 | 000000000 | 00000 |
| 4" | Partially Threaded | 1 3/8" | Fine | 13/16" | 23/64" | 150,000 | ASME B18.2.1, SAE J429 | 5 | 000000000 | 00000 |
| 4 1/2" | Partially Threaded | 1 3/8" | Fine | 13/16" | 23/64" | 150,000 | ASME B18.2.1, SAE J429 | 1 | 000000000 | 0000 |
| 5" | Partially Threaded | 1 3/8" | Fine | 13/16" | 23/64" | 150,000 | ASME B18.2.1, SAE J429 | 1 | 000000000 | 0000 |
| 6" | Partially Threaded | 1 3/8" | Fine | 13/16" | 23/64" | 150,000 | ASME B18.2.1, SAE J429 | 1 | 000000000 | 0000 |
Medium-Strength Grade 5 Steel Hex Head Screws
Made from Grade 5 steel, these screws are suitable for fastening most machinery and equipment. Dimensions meet ASME B18.2.1 specifications. Grade 5 steel hex head screws are marked with three radial lines. Length is measured from under the head.
Zinc-plated steel screws resist corrosion in wet environments. Match the thread spacing of mating components. Fine and extra-fine threads are closely spaced to prevent loosening from vibration; the finer the thread, the better the resistance.
Screws that meet ASTM A449 or SAE J429 comply with specifications and testing requirements for material quality.
For technical drawings and 3-D models, click on a part number.
Head | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Threading | Min. Thread Lg. | Thread Spacing | Wd. | Ht. | Tensile Strength, psi | Specifications Met | Pkg. Qty. | Pkg. | |
Zinc-Plated Grade 5 Steel | ||||||||||
9/16"-18 | ||||||||||
| 1" | Fully Threaded | __ | Fine | 13/16" | 23/64" | 120,000 | ASME B18.2.1, SAE J429 | 10 | 000000000 | 00000 |
| 1 1/4" | Fully Threaded | __ | Fine | 13/16" | 23/64" | 120,000 | ASME B18.2.1, SAE J429 | 10 | 000000000 | 0000 |
| 1 1/2" | Fully Threaded | __ | Fine | 13/16" | 23/64" | 120,000 | ASME B18.2.1, SAE J429 | 10 | 000000000 | 0000 |
| 1 3/4" | Fully Threaded | __ | Fine | 13/16" | 23/64" | 120,000 | ASME B18.2.1, SAE J429 | 10 | 000000000 | 0000 |
| 2" | Fully Threaded | __ | Fine | 13/16" | 23/64" | 120,000 | ASME B18.2.1, SAE J429 | 10 | 000000000 | 00000 |
| 2 1/4" | Partially Threaded | 1 3/8" | Fine | 13/16" | 23/64" | 120,000 | ASME B18.2.1, SAE J429 | 10 | 000000000 | 00000 |
| 2 1/2" | Partially Threaded | 1 3/8" | Fine | 13/16" | 23/64" | 120,000 | ASME B18.2.1, SAE J429 | 5 | 000000000 | 0000 |
| 2 3/4" | Partially Threaded | 1 3/8" | Fine | 13/16" | 23/64" | 120,000 | ASME B18.2.1, SAE J429 | 5 | 000000000 | 0000 |
| 3" | Partially Threaded | 1 3/8" | Fine | 13/16" | 23/64" | 120,000 | ASME B18.2.1, SAE J429 | 5 | 000000000 | 0000 |
| 3 1/4" | Partially Threaded | 1 3/8" | Fine | 13/16" | 23/64" | 120,000 | ASME B18.2.1, SAE J429 | 5 | 000000000 | 0000 |
| 3 1/2" | Partially Threaded | 1 3/8" | Fine | 13/16" | 23/64" | 120,000 | ASME B18.2.1, SAE J429 | 5 | 000000000 | 0000 |
| 4" | Partially Threaded | 1 3/8" | Fine | 13/16" | 23/64" | 120,000 | ASME B18.2.1, SAE J429 | 5 | 000000000 | 0000 |
| 4 1/2" | Partially Threaded | 1 3/8" | Fine | 13/16" | 23/64" | 120,000 | ASME B18.2.1, SAE J429 | 5 | 000000000 | 00000 |
| 5" | Partially Threaded | 1 3/8" | Fine | 13/16" | 23/64" | 120,000 | ASME B18.2.1, SAE J429 | 5 | 000000000 | 00000 |
| 5 1/2" | Partially Threaded | 1 3/8" | Fine | 13/16" | 23/64" | 120,000 | ASME B18.2.1, SAE J429 | 5 | 000000000 | 00000 |
| 6" | Partially Threaded | 1 3/8" | Fine | 13/16" | 23/64" | 120,000 | ASME B18.2.1, SAE J429 | 5 | 000000000 | 00000 |
18-8 Stainless Steel Hex Head Screws
Made from 18-8 stainless steel, these screws have good chemical resistance and may be mildly magnetic. Length is measured from under the head.
Match the thread spacing of mating components. Fine and extra-fine threads are closely spaced to prevent loosening from vibration; the finer the thread, the better the resistance.
Screws that meet ASME or ISO (formerly DIN) specifications comply with these dimensional standards.
For technical drawings and 3-D models, click on a part number.
Head | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Threading | Min. Thread Lg. | Thread Spacing | Wd. | Ht. | Tensile Strength, psi | Specifications Met | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | ||||||||||
9/16"-18 | ||||||||||
| 1" | Fully Threaded | __ | Fine | 13/16" | 23/64" | 70,000 | ASME B18.2.1 | 1 | 000000000 | 00000 |
| 1 1/2" | Fully Threaded | __ | Fine | 13/16" | 23/64" | 70,000 | ASME B18.2.1 | 1 | 000000000 | 0000 |
| 2" | Fully Threaded | __ | Fine | 13/16" | 23/64" | 70,000 | ASME B18.2.1 | 1 | 000000000 | 0000 |
| 2 1/2" | Partially Threaded | 1 3/8" | Fine | 13/16" | 23/64" | 70,000 | ASME B18.2.1 | 1 | 000000000 | 0000 |
| 3" | Partially Threaded | 1 3/8" | Fine | 13/16" | 23/64" | 70,000 | ASME B18.2.1 | 1 | 000000000 | 0000 |
Alloy Steel Socket Head Screws
With a tensile strength of 170,000 psi, these alloy steel screws are stronger than Grade 8 steel screws. Length is measured from under the head.
Black-oxide steel screws are mildly corrosion resistant in dry environments. Fine and extra-fine threads are closely spaced to prevent loosening from vibration; the finer the thread, the better the resistance. They are not compatible with coarse threads.
For technical drawings and 3-D models, click on a part number.
Head | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Threading | Min. Thread Lg. | Thread Spacing | Dia. | Ht. | Drive Size | Tensile Strength, psi | Specifications Met | Pkg. Qty. | Pkg. | |
9/16"-18 | |||||||||||
Black-Oxide Alloy Steel | |||||||||||
| 3/4" | Fully Threaded | __ | Fine | 27/32" | 9/16" | 7/16" | 170,000 | ASTM A574 | 1 | 000000000 | 00000 |
| 1" | Fully Threaded | __ | Fine | 27/32" | 9/16" | 7/16" | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
| 1 1/2" | Fully Threaded | __ | Fine | 27/32" | 9/16" | 7/16" | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
| 1 3/4" | Fully Threaded | __ | Fine | 27/32" | 9/16" | 7/16" | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
| 2" | Fully Threaded | __ | Fine | 27/32" | 9/16" | 7/16" | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
| 2 1/2" | Fully Threaded | __ | Fine | 27/32" | 9/16" | 7/16" | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
| 3" | Partially Threaded | 1 5/8" | Fine | 27/32" | 9/16" | 7/16" | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
| 4" | Partially Threaded | 1 1/2" | Fine | 27/32" | 9/16" | 7/16" | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
18-8 Stainless Steel Socket Head Screws
Made from 18-8 stainless steel, these screws have good chemical resistance and may be mildly magnetic. Length is measured from under the head. Fine threads are closely spaced to prevent loosening from vibration. They are not compatible with coarse threads.
For technical drawings and 3-D models, click on a part number.
Medium-Strength Steel Threaded Rods—Grade B7
These Grade B7 threaded rods meet the pressure and temperature requirements of ASTM A193 and are often used to secure pressure tanks, valves, and flanges.
For technical drawings and 3-D models, click on a part number.
| Lg. | Tensile Strength, psi | Hardness | Specifications Met | Each | |
9/16"-18 | |||||
|---|---|---|---|---|---|
| 4" | 120,000 | Rockwell C35 | ASTM A193 | 000000000 | 00000 |
| 6" | 120,000 | Rockwell C35 | ASTM A193 | 000000000 | 0000 |
| 1ft. | 120,000 | Rockwell C35 | ASTM A193 | 000000000 | 00000 |
| 2ft. | 120,000 | Rockwell C35 | ASTM A193 | 000000000 | 00000 |
| 3ft. | 120,000 | Rockwell C35 | ASTM A193 | 000000000 | 00000 |
| 6ft. | 120,000 | Rockwell C35 | ASTM A193 | 000000000 | 00000 |
Low-Strength Steel Threaded Rods
About half the strength of medium-strength steel threaded rods, use these 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.
18-8 Stainless Steel Threaded Rods
18-8 stainless steel threaded rods have good chemical resistance and may be mildly magnetic.
For technical drawings and 3-D models, click on a part number.
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.
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 | |||||
| 9/16"-18 | 2 1/8" | 13/16" | 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 | |||||
| 9/16"-18 | 2 1/8" | 13/16" | 000000000 | 00000 | 00000 |
Eyebolts—For Lifting
Also known as machinery eyebolts.
Zinc-plated steel eyebolts offer good corrosion resistance.
Note: Capacities listed are for vertical lifting only. Eyebolts with shoulder can be used for angular lifting up to 45°, but the capacities will be significantly reduced. For angular lifting, we recommend Hoist Rings. Eyebolts without shoulder are for vertical lifting only.
Warning: Never use to lift people or items over people.
For technical drawings and 3-D models, click on a part number.
Thread | |||||||
|---|---|---|---|---|---|---|---|
| Size | Lg. | Shank Lg. | Eye Dia. | Vertical Capacity, lbs. | Overall Lg. | Each | |
With Shoulder | |||||||
Steel | |||||||
| 9/16"-18 | 1 5/8" | 1 5/8" | 1 1/4" | 3,000 | 4 1/2" | 00000000 | 000000 |
Zinc-Plated Steel | |||||||
| 9/16"-18 | 1 5/8" | 1 5/8" | 1 1/4" | 3,000 | 4 1/2" | 00000000 | 00000 |
Without Shoulder | |||||||
Steel | |||||||
| 9/16"-18 | 1 5/8" | 1 5/8" | 1 1/4" | 3,000 | 3 7/8" | 00000000 | 00000 |
Zinc-Plated Steel | |||||||
| 9/16"-18 | 1 5/8" | 1 5/8" | 1 1/4" | 3,000 | 3 7/8" | 00000000 | 00000 |
Die Spring Screw Caps
In addition to providing a backing for springs, these screw caps can also be used to control spring tension. Install them by drilling and tapping a hole through your die set.
For technical drawings and 3-D models, click on a part number.
| Thread Size | Hex Wd. | Thick. | Material | Each | |
| 9/16"-18 | 1/4" | 5/16" | Black-Oxide Steel | 0000000 | 00000 |
Center-Locating Punches for Threaded Holes
Also known as transfer screws, these punches can be used in any threaded hole to transfer the hole location. Use the handle to screw a punch into a hole. Place your workpiece against the punch and strike it with a hammer to mark the hole location.
| Thread Size | Includes | Punch Material | Grip Texture | Each | |
Inch | |||||
|---|---|---|---|---|---|
| 9/16"-18 | Handle, Six Punches | Steel | Smooth | 0000000 | 000000 |
Tight-Space 37° Flared Fittings for Aluminum Tubing
- For Use With: Air, Cutting Oil, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Mineral Oil, Water
- Tubing: Use with seamless aluminum
Also known as JIC (Joint Industrial Council) fittings, these provide a tight metal-to-metal seal on tubing that is flared to 37°. Fittings are aluminum, which is lightweight with good corrosion resistance. They require a nut and a sleeve (ferrule) for each tube end. Nuts and sleeves are sold separately.
For technical drawings and 3-D models, click on a part number.
| For Tube OD | Thread Size | Adapter Material | Specifications Met | Each | |
UN/UNF (SAE) Threads | |||||
|---|---|---|---|---|---|
| 3/8" | 9/16"-18 | Anodized Aluminum | SAE AS3220 | 0000000 | 000000 |
| For Tube OD | Thread Size | Bolt Material | Max. Pressure | Each | |
UN/UNF (SAE) Threads | |||||
|---|---|---|---|---|---|
| 3/8" | 9/16"-18 | Anodized Aluminum | Not Rated | 0000000 | 000000 |
| Thread Size | For Tube OD | Nut Material | Specifications Met | Pkg. Qty. | Pkg. | |
| 9/16"-18 | 3/8" | Anodized Aluminum | AN818-06, AN901-06, SAE AS3220, SAE AS5161, SAE AS5162 | 5 | 0000000 | 00000 |
| Thread Size | For Tube OD | Adapter Material | Specifications Met | Each | |
| 9/16"-18 | 3/8" | Anodized Aluminum | SAE AS5162 | 0000000 | 000000 |
| For Tube OD | Sleeve Material | Specifications Met | Pkg. Qty. | Pkg. | |
| 3/8" | Anodized Aluminum | AN818-06 | 5 | 0000000 | 00000 |
| For Tube OD | Pkg. Qty. | Pkg. | |
| 3/8" | 5 | 0000000 | 00000 |