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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Thread Pitch Thread Pitch |
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Thread Type Thread Type |
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Threading Threading |
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![]() | Fully Threaded |
![]() | Partially Threaded |
![]() | Threaded on Both Ends |
Head Type Head Type |
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![]() | Socket |
Fastener Strength Grade/Class Fastener StrengthGrade/Class |
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Drive Style Drive Style |
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Material Material |
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Socket Head Profile Socket Head Profile |
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Drive Size Drive Size |
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Finish Finish |
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Thread Spacing Thread Spacing |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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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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Tensile Strength Tensile Strength |
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Thread Fit Thread Fit |
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Thread Direction Thread Direction |
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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 and black-oxide steel screws are mildly corrosion resistant in dry environments.
Coarse threads are the industry standard; choose these screws if you don’t know the pitch or threads per inch. Screws that meet ASME B18.3, ASME B18.3.1M, ISO 21269, and ISO 4762 (formerly DIN 912) comply with specifications for dimensional standards.
For technical drawings and 3-D models, click on a part number.
Head | |||||||||||
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Lg., mm | Threading | Min. Thread Lg., mm | Thread Spacing | Dia., mm | Ht., mm | Drive Size, mm | Tensile Strength, psi | Specifications Met | Pkg. Qty. | Pkg. | |
M42 × 4.5 mm | |||||||||||
Black-Oxide Class 12.9 Alloy Steel | |||||||||||
100 | Fully Threaded | __ | Coarse | 63 | 42 | 32 | 170,000 | DIN 912, ISO 4762 | 1 | 000000000 | 000000 |
120 | Fully Threaded | __ | Coarse | 63 | 42 | 32 | 170,000 | DIN 912, ISO 4762 | 1 | 000000000 | 00000 |
180 | Partially Threaded | 96 | Coarse | 63 | 42 | 32 | 170,000 | DIN 912, ISO 4762 | 1 | 000000000 | 00000 |
200 | Partially Threaded | 96 | Coarse | 63 | 42 | 32 | 170,000 | DIN 912, ISO 4762 | 1 | 000000000 | 00000 |
Metric 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.
Medium-Strength Steel Threaded Rods—Class 8.8

An economical alternative to Grade B7 and Grade B16 threaded rods, these metric Class 8.8 rods are suitable for fastening most machinery and equipment.
Zinc-plated steel threaded rods resist corrosion in wet environments.
For technical drawings and 3-D models, click on a part number.
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.
Metric High-Strength Steel Threaded Rods—Class 10.9

These Class 10.9 steel threaded rods are about 25% stronger than medium-strength steel rods.
For technical drawings and 3-D models, click on a part number.
Metric 18-8 Stainless Steel Threaded Rods

These 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.
Setup Studs

Secure setup clamps and fixtures to your machine table, or assemble heavy machines, such as engine mounts. These studs act as a pilot when connecting parts since they’re headless, which eases installation. Unlike a bolt, which has a head, they let you access parts from either end, but they require nuts to hold the part. Pair them with a T-slot or flanged nut when securing to a machine table. Or, put a nut on before your part to work as a float, allowing you to adjust the height of your part. The unthreaded middle is useful for gripping and adjusting. Also known as double-ended studs.
Steel studs are stronger than stainless steel studs. But, unfinished steel studs will rust from air and moisture.
For technical drawings and 3-D models, click on a part number.
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.
Warning: Never use to lift people or items over people.
For technical drawings and 3-D models, click on a part number.