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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Threading Threading |
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 | Fully Threaded |
 | Partially Threaded |
Material Material |
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Finish Finish |
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Thread Spacing Thread Spacing |
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Drive Style Drive Style |
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Tensile Strength Tensile Strength |
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Thread Type Thread Type |
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Thread Direction Thread Direction |
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Hardness Hardness |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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Socket Head Profile Socket Head Profile |
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 | Standard |
About Threaded Studs and Rods
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About Hex Head Screws and Bolts
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About Socket Head Screws
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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 | |||||||||||
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| Lg. | Threading | Min. Thread Lg. | Thread Spacing | Dia. | Ht. | Drive Size | Tensile Strength, psi | Specifications Met | Pkg. Qty. | Pkg. | |
1 1/8"-12 | |||||||||||
Black-Oxide Alloy Steel | |||||||||||
| 3" | Fully Threaded | __ | Fine | 1 11/16" | 1 1/8" | 7/8" | 170,000 | ASTM A574 | 1 | 000000000 | 000000 |
| 4" | Partially Threaded | 2 7/8" | Fine | 1 11/16" | 1 1/8" | 7/8" | 170,000 | ASTM A574 | 1 | 000000000 | 00000 |
| 5" | Partially Threaded | 2 7/8" | Fine | 1 11/16" | 1 1/8" | 7/8" | 170,000 | ASTM A574 | 1 | 000000000 | 00000 |
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 | ||||||||||
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| Lg. | Threading | Min. Thread Lg. | Thread Spacing | Wd. | Ht. | Tensile Strength, psi | Specifications Met | Pkg. Qty. | Pkg. | |
Zinc Yellow-Chromate Plated Grade 8 Steel | ||||||||||
1 1/8"-12 | ||||||||||
| 2 1/4" | Fully Threaded | __ | Fine | 1 11/16" | 23/32" | 150,000 | ASME B18.2.1, SAE J429 | 1 | 000000000 | 000000 |
| 2 3/4" | Partially Threaded | 2 1/2" | Fine | 1 11/16" | 23/32" | 150,000 | ASME B18.2.1, SAE J429 | 1 | 000000000 | 00000 |
| 3 1/4" | Partially Threaded | 2 1/2" | Fine | 1 11/16" | 23/32" | 150,000 | ASME B18.2.1, SAE J429 | 1 | 000000000 | 00000 |
| 5" | Partially Threaded | 2 1/2" | Fine | 1 11/16" | 23/32" | 150,000 | ASME B18.2.1, SAE J429 | 1 | 000000000 | 00000 |
| 9" | Partially Threaded | 2 3/4" | Fine | 1 11/16" | 23/32" | 150,000 | ASME B18.2.1, SAE J429 | 1 | 000000000 | 00000 |
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.
Low-Strength Steel Threaded Rods
About half the strength of medium-strength steel threaded rods, use these for light duty hanging, mounting, and fastening.
For technical drawings and 3-D models, click on a part number.
High-Strength Steel Threaded Rods
Grade 8 steel threaded rods are about 25% stronger than medium-strength steel rods.
For technical drawings and 3-D models, click on a part number.