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 |
Head Type Head Type |
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![]() | Socket |
Drive Style Drive Style |
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Material Material |
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Thread Spacing Thread Spacing |
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Tensile Strength Tensile Strength |
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Socket Head Profile Socket Head Profile |
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Size Size |
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Specifications Met Specifications Met |
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Thread Direction Thread Direction |
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Finish Finish |
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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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Fastener Strength Grade/Class Fastener StrengthGrade/Class |
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Minimum Thread Length Minimum Thread Length |
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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. | |
1 1/2"-12 | |||||||||||
Black-Oxide Alloy Steel | |||||||||||
3" | Fully Threaded | __ | Fine | 2 1/4" | 1 1/2" | 1" | 170,000 | ASTM A574 | 1 | 000000000 | 000000 |
3 1/2" | Fully Threaded | __ | Fine | 2 1/4" | 1 1/2" | 1" | 170,000 | ASTM A574 | 1 | 000000000 | 00000 |
4" | Fully Threaded | __ | Fine | 2 1/4" | 1 1/2" | 1" | 170,000 | ASTM A574 | 1 | 000000000 | 00000 |
4 1/2" | Fully Threaded | __ | Fine | 2 1/4" | 1 1/2" | 1" | 170,000 | ASTM A574 | 1 | 000000000 | 00000 |
5" | Partially Threaded | 3 3/4" | Fine | 2 1/4" | 1 1/2" | 1" | 170,000 | ASTM A574 | 1 | 000000000 | 00000 |
5 1/2" | Partially Threaded | 3 3/4" | Fine | 2 1/4" | 1 1/2" | 1" | 170,000 | ASTM A574 | 1 | 000000000 | 00000 |
6" | Partially Threaded | 3 3/4" | Fine | 2 1/4" | 1 1/2" | 1" | 170,000 | ASTM A574 | 1 | 000000000 | 00000 |
7" | Partially Threaded | 3 3/4" | Fine | 2 1/4" | 1 1/2" | 1" | 170,000 | ASTM A574 | 1 | 000000000 | 00000 |
8" | Partially Threaded | 3 3/4" | Fine | 2 1/4" | 1 1/2" | 1" | 170,000 | ASTM A574 | 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.
Zinc-plated steel threaded rods are corrosion resistant in wet environments.
For technical drawings and 3-D models, click on a part number.
High-Strength Steel Threaded Rods

Comparable to Grade 8 steel, these threaded rods have a tensile strength of 150,000 psi, making them about 25% stronger than medium-strength steel rods.
For technical drawings and 3-D models, click on a part number.