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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Head Type Head Type |
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Threading Threading |
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![]() | Fully Threaded |
![]() | Partially Threaded |
Size Size |
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Drive Style Drive Style |
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Material Material |
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Thread Spacing Thread Spacing |
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Thread Fit Thread Fit |
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Tensile Strength Tensile Strength |
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Finish Finish |
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Minimum Thread Length Minimum Thread Length |
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Thread Type Thread Type |
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Socket Head Profile Socket Head Profile |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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Hardness Hardness |
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Fastener Strength Grade/Class Fastener StrengthGrade/Class |
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Thread Direction Thread Direction |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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About Threaded Studs and Rods
More
About Socket Head Screws
More
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. | |
2"-8 | |||||||||||
Black-Oxide Alloy Steel | |||||||||||
6" | Partially Threaded | 5" | Fine | 3" | 2" | 1 1/2" | 170,000 | ASTM A574 | 1 | 000000000 | 0000000 |
8" | Partially Threaded | 5" | Fine | 3" | 2" | 1 1/2" | 170,000 | ASTM A574 | 1 | 000000000 | 000000 |
12" | Partially Threaded | 5" | Fine | 3" | 2" | 1 1/2" | 170,000 | ASTM A574 | 1 | 000000000 | 000000 |
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.