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 Type Thread Type |
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Threading Threading |
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 | Fully Threaded |
 | Partially Threaded |
Length Length |
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Material Material |
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Fastener Strength Grade/Class Fastener StrengthGrade/Class |
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Drive Style Drive Style |
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Specifications Met Specifications Met |
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Thread Direction Thread Direction |
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Socket Head Profile Socket Head Profile |
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Thread Fit Thread Fit |
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Hardness Hardness |
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Tensile Strength Tensile Strength |
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About Threaded Studs and Rods
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Selecting Compatible Lead Screws and Nuts
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About Socket Head Screws
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About Hex Head Screws and Bolts
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About Flat 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.
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 B18.3M, 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 | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Lg., mm | Threading | Min. Thread Lg., mm | Thread Spacing | Dia., mm | Ht., mm | Drive Size, mm | Tensile Strength, psi | Specifications Met | Pkg. Qty. | Pkg. | |
M18 × 2.5 mm | |||||||||||
Black-Oxide Class 12.9 Alloy Steel | |||||||||||
| 30 | Fully Threaded | __ | Coarse | 27 | 18 | 14 | 170,000 | DIN 912, ISO 4762 | 5 | 000000000 | 00000 |
| 35 | Fully Threaded | __ | Coarse | 27 | 18 | 14 | 170,000 | DIN 912, ISO 4762 | 1 | 000000000 | 0000 |
| 40 | Fully Threaded | __ | Coarse | 27 | 18 | 14 | 170,000 | DIN 912, ISO 4762 | 5 | 000000000 | 0000 |
| 45 | Fully Threaded | __ | Coarse | 27 | 18 | 14 | 170,000 | DIN 912, ISO 4762 | 5 | 000000000 | 0000 |
| 50 | Fully Threaded | __ | Coarse | 27 | 18 | 14 | 170,000 | DIN 912, ISO 4762 | 5 | 000000000 | 0000 |
| 55 | Fully Threaded | __ | Coarse | 27 | 18 | 14 | 170,000 | DIN 912, ISO 4762 | 5 | 000000000 | 0000 |
| 60 | Fully Threaded | __ | Coarse | 27 | 18 | 14 | 170,000 | DIN 912, ISO 4762 | 5 | 000000000 | 00000 |
| 65 | Fully Threaded | __ | Coarse | 27 | 18 | 14 | 170,000 | DIN 912, ISO 4762 | 5 | 000000000 | 00000 |
| 70 | Partially Threaded | 48 | Coarse | 27 | 18 | 14 | 170,000 | DIN 912, ISO 4762 | 1 | 000000000 | 0000 |
| 75 | Partially Threaded | 48 | Coarse | 27 | 18 | 14 | 170,000 | DIN 912, ISO 4762 | 1 | 000000000 | 0000 |
| 80 | Partially Threaded | 48 | Coarse | 27 | 18 | 14 | 170,000 | DIN 912, ISO 4762 | 1 | 000000000 | 0000 |
| 90 | Partially Threaded | 48 | Coarse | 27 | 18 | 14 | 170,000 | DIN 912, ISO 4762 | 1 | 000000000 | 0000 |
| 100 | Partially Threaded | 48 | Coarse | 27 | 18 | 14 | 170,000 | DIN 912, ISO 4762 | 1 | 000000000 | 0000 |
| 110 | Partially Threaded | 48 | Coarse | 27 | 18 | 14 | 170,000 | DIN 912, ISO 4762 | 1 | 000000000 | 0000 |
| 120 | Partially Threaded | 48 | Coarse | 27 | 18 | 14 | 170,000 | DIN 912, ISO 4762 | 1 | 000000000 | 0000 |
| 130 | Partially Threaded | 48 | Coarse | 27 | 18 | 14 | 170,000 | DIN 912, ISO 4762 | 1 | 000000000 | 0000 |
| 140 | Partially Threaded | 48 | Coarse | 27 | 18 | 14 | 170,000 | DIN 912, ISO 4762 | 1 | 000000000 | 0000 |
| 150 | Partially Threaded | 48 | Coarse | 27 | 18 | 14 | 170,000 | DIN 912, ISO 4762 | 1 | 000000000 | 0000 |
| 160 | Partially Threaded | 48 | Coarse | 27 | 18 | 14 | 170,000 | DIN 912, ISO 4762 | 1 | 000000000 | 0000 |
| 180 | Partially Threaded | 48 | Coarse | 27 | 18 | 14 | 170,000 | DIN 912, ISO 4762 | 1 | 000000000 | 0000 |
| 200 | Partially Threaded | 48 | Coarse | 27 | 18 | 14 | 170,000 | DIN 912, ISO 4762 | 1 | 000000000 | 0000 |
High-Strength Metric Class 10.9 Steel Hex Head Screws
Choose these Class 10.9 steel screws for high-stress applications, such as valves, pumps, motors, and automotive suspension systems. They are at least 25% stronger than medium-strength steel screws. Dimensions meet ISO (formerly DIN) specifications. Length is measured from under the head.
Steel screws should be used in dry, noncorrosive environments. Match the thread spacing of mating components. Coarse threads are the industry standard; choose these screws if you don’t know the pitch.
For technical drawings and 3-D models, click on a part number.
Head | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Lg., mm | Threading | Min. Thread Lg., mm | Thread Spacing | Wd., mm | Ht., mm | Tensile Strength, psi | Specifications Met | Pkg. Qty. | Pkg. | |
Class 10.9 Steel | ||||||||||
M18 × 2.5 mm | ||||||||||
| 55 | Partially Threaded | 37 | Coarse | 27 | 11.5 | 150,000 | ISO 4014, DIN 931 | 5 | 000000000 | 00000 |
| 60 | Partially Threaded | 37 | Coarse | 27 | 11.5 | 150,000 | ISO 4014, DIN 931 | 5 | 000000000 | 0000 |
| 70 | Partially Threaded | 37 | Coarse | 27 | 11.5 | 150,000 | ISO 4014, DIN 931 | 5 | 000000000 | 00000 |
| 80 | Partially Threaded | 37 | Coarse | 27 | 11.5 | 150,000 | ISO 4014, DIN 931 | 5 | 000000000 | 00000 |
| 100 | Partially Threaded | 37 | Coarse | 27 | 11.5 | 150,000 | ISO 4014, DIN 931 | 5 | 000000000 | 00000 |
Medium-Strength Metric Class 8.8 Steel Hex Head Screws
These Class 8.8 steel screws are suitable for fastening most machinery and equipment. Dimensions meet ISO (formerly DIN) specifications. Length is measured from under the head.
Zinc-plated steel screws resist corrosion in wet environments. Match the thread spacing of mating components. Coarse threads are the industry standard; choose these screws if you don’t know the pitch. Fine and extra-fine threads are closely spaced to prevent loosening from vibration; the finer the thread, the better the resistance.
For technical drawings and 3-D models, click on a part number.
Head | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Lg., mm | Threading | Thread Spacing | Wd., mm | Ht., mm | Tensile Strength, psi | Specifications Met | Pkg. Qty. | Pkg. | |
Zinc-Plated Class 8.8 Steel | |||||||||
M18 × 2.5 mm | |||||||||
| 30 | Fully Threaded | Coarse | 27 | 11.5 | 110,000 | ISO 4017, DIN 933 | 5 | 000000000 | 00000 |
| 35 | Fully Threaded | Coarse | 27 | 11.5 | 110,000 | ISO 4017, DIN 933 | 5 | 000000000 | 0000 |
| 40 | Fully Threaded | Coarse | 27 | 11.5 | 110,000 | ISO 4017, DIN 933 | 5 | 000000000 | 0000 |
| 45 | Fully Threaded | Coarse | 27 | 11.5 | 110,000 | ISO 4017, DIN 933 | 5 | 000000000 | 0000 |
| 50 | Fully Threaded | Coarse | 27 | 11.5 | 110,000 | ISO 4017, DIN 933 | 5 | 000000000 | 0000 |
| 60 | Fully Threaded | Coarse | 27 | 11.5 | 110,000 | ISO 4017, DIN 933 | 5 | 000000000 | 00000 |
| 70 | Fully Threaded | Coarse | 27 | 11.5 | 110,000 | ISO 4017, DIN 933 | 5 | 000000000 | 00000 |
| 80 | Fully Threaded | Coarse | 27 | 11.5 | 110,000 | ISO 4017, DIN 933 | 5 | 000000000 | 00000 |
M18 × 1.5 mm | |||||||||
| 30 | Fully Threaded | Fine | 27 | 11.5 | 110,000 | ISO 8676, DIN 961 | 1 | 000000000 | 0000 |
| 40 | Fully Threaded | Fine | 27 | 11.5 | 110,000 | ISO 8676, DIN 961 | 1 | 000000000 | 0000 |
| 50 | Fully Threaded | Fine | 27 | 11.5 | 110,000 | ISO 8676, DIN 961 | 1 | 000000000 | 0000 |
| 60 | Fully Threaded | Fine | 27 | 11.5 | 110,000 | ISO 8676, DIN 961 | 1 | 000000000 | 0000 |
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.
Metric screws are also known as A2 stainless steel screws.
Match the thread spacing of mating components. Coarse threads are the industry standard; choose these screws if you don’t know the pitch or threads per inch.
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 | Thread Spacing | Wd. | Ht. | Tensile Strength, psi | Specifications Met | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | |||||||||
M18 × 2.5 mm | |||||||||
| 30mm | Fully Threaded | Coarse | 27mm | 11.5mm | 100,000 | ISO 4017, DIN 933 | 1 | 000000000 | 00000 |
| 40mm | Fully Threaded | Coarse | 27mm | 11.5mm | 100,000 | ISO 4017, DIN 933 | 1 | 000000000 | 0000 |
| 50mm | Fully Threaded | Coarse | 27mm | 11.5mm | 100,000 | ISO 4017, DIN 933 | 1 | 000000000 | 0000 |
| 60mm | Fully Threaded | Coarse | 27mm | 11.5mm | 100,000 | ISO 4017, DIN 933 | 1 | 000000000 | 0000 |
| 80mm | Fully Threaded | Coarse | 27mm | 11.5mm | 100,000 | ISO 4017, DIN 933 | 1 | 000000000 | 0000 |
| 100mm | Fully Threaded | Coarse | 27mm | 11.5mm | 100,000 | ISO 4017, DIN 933 | 1 | 000000000 | 0000 |
Metric Alloy Steel Hex Drive Flat Head Screws
Made from alloy steel, these screws are nearly twice as strong as stainless steel flat head screws. They're angled under the head to sit flush within countersunk holes. Length is measured from the top of the head.
Black-oxide alloy steel screws have mild corrosion resistance in dry environments.
For technical drawings and 3-D models, click on a part number.
| Lg., mm | Threading | Head Dia., mm | Head Ht., mm | Drive Size, mm | Tensile Strength, psi | Specifications Met | Pkg. Qty. | Pkg. | |
Black-Oxide Class 10.9 Alloy Steel | |||||||||
|---|---|---|---|---|---|---|---|---|---|
M18 × 2.5 mm | |||||||||
| 40 | Fully Threaded | 33 | 8 | 12 | 120,000 | DIN 7991, ISO 10642 | 5 | 000000000 | 000000 |
| 50 | Fully Threaded | 33 | 8 | 12 | 120,000 | DIN 7991, ISO 10642 | 5 | 000000000 | 00000 |
| 60 | Fully Threaded | 33 | 8 | 12 | 120,000 | DIN 7991, ISO 10642 | 5 | 000000000 | 00000 |
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.
| Lg. | Thread Pitch, mm | Tensile Strength, psi | Hardness | Specifications Met | Each | |
Steel | ||||||
|---|---|---|---|---|---|---|
M18 | ||||||
| 50 mm | 2.5 | 150,000 | Rockwell C32 | DIN 975 | 0000000 | 000000 |
| 100 mm | 2.5 | 150,000 | Rockwell C32 | DIN 975 | 0000000 | 00000 |
| 150 mm | 2.5 | 150,000 | Rockwell C32 | DIN 975 | 0000000 | 00000 |
| 200 mm | 2.5 | 150,000 | Rockwell C32 | DIN 975 | 0000000 | 00000 |
| 300 mm | 2.5 | 150,000 | Rockwell C32 | DIN 975 | 0000000 | 00000 |
| 500 mm | 2.5 | 150,000 | Rockwell C32 | DIN 975 | 0000000 | 00000 |
| 1 m | 2.5 | 150,000 | Rockwell C32 | DIN 975 | 0000000 | 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.
Zinc yellow-chromate plated steel threaded rods resist corrosion in wet environments.
For technical drawings and 3-D models, click on a part number.
| Lg. | Thread Pitch, mm | Tensile Strength, psi | Hardness | Specifications Met | Each | |
Steel | ||||||
|---|---|---|---|---|---|---|
M18 | ||||||
| 50 mm | 2.5 | 120,000 | Rockwell C35 | ASTM A193, DIN 976 | 000000000 | 00000 |
| 100 mm | 2.5 | 120,000 | Rockwell C35 | ASTM A193, DIN 976 | 000000000 | 0000 |
| 300 mm | 2.5 | 120,000 | Rockwell C35 | ASTM A193, DIN 976 | 000000000 | 00000 |
| 1 m | 2.5 | 120,000 | Rockwell C35 | ASTM A193, DIN 976 | 000000000 | 00000 |
| 2 m | 2.5 | 120,000 | Rockwell C35 | ASTM A193, DIN 976 | 000000000 | 00000 |
Zinc Yellow-Chromate Plated Steel | ||||||
M18 | ||||||
| 1 m | 2.5 | 120,000 | Rockwell C35 | ASTM A193, DIN 976 | 000000000 | 00000 |
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 Fine-Thread 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.
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 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.
Metric Ball Screws and Nuts
Internal ball bearings provide smooth low-friction travel in applications that require high speeds, accurate positioning, and repeatable movement. Also known as single-start ball screws and nuts, these have a single thread that runs the length of the screw. They operate with more torque than fast-travel ball screws and nuts. To ensure compatibility, select components that have the same thread size and pitch. Ball nuts are furnished with a tube to keep ball bearings in place. Do not remove the tube until you are ready to install the nuts onto the screws.
Travel distance per turn, also known as screw lead, is the distance a ball nut moves with one revolution of the ball screw.
For technical drawings and 3-D models, click on a part number.
Root diameter indicates the diameter the ball screw will be after machining away the threads.
| Thread Size | Thread Pitch, mm | Lg., mm | No. of Thread Starts | Travel Distance per Turn, mm | Accuracy for Travel Distance per Turn | Root Dia., mm | Hardness | Temperature Range, °F | Each | |
Carbon Steel | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| M18 | 8 | 500 | 1 | 8 | ±0.210 mm per 300 mm | 14.4 | Rockwell C58 | Not Rated to 175° | 00000000 | 0000000 |
| M18 | 8 | 1,000 | 1 | 8 | ±0.210 mm per 300 mm | 14.4 | Rockwell C58 | Not Rated to 175° | 00000000 | 000000 |
| M18 | 8 | 1,500 | 1 | 8 | ±0.210 mm per 300 mm | 14.4 | Rockwell C58 | Not Rated to 175° | 00000000 | 000000 |
| Thread Size | Thread Pitch, mm | Lg., mm | Wd., mm | Ht., mm | Center Ht., mm | No. of Thread Starts | Travel Distance per Turn, mm | Hardness | Dynamic Thrust Load Cap., lbs. | Max. Backlash, mm | Includes | Temperature Range, °F | Each | |
Alloy Steel | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| M18 | 8 | 56 | 48 | 44 | 17 | 1 | 8 | Rockwell C58 | 2,940 | 0.1 | Seals | Not Rated to 175° | 00000000 | 0000000 |
Flange | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Thread Size | Thread Pitch, mm | Lg., mm | Dia., mm | Dia., mm | Thick., mm | No. of Thread Starts | Travel Distance per Turn, mm | Hardness | Dynamic Thrust Load Cap., lbs. | Max. Backlash, mm | Includes | Temperature Range, °F | Each | |
Alloy Steel | ||||||||||||||
| M18 | 8 | 61 | 50 | 80 | 12 | 1 | 8 | Rockwell C58 | 2,940 | 0.1 | Seals | Not Rated° to 175° | 00000000 | 0000000 |
Eyebolts—For Lifting
Also known as machinery eyebolts.
Galvanized steel eyebolts have a hot-dipped finish for more corrosion resistance than zinc-plated steel.
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.
Eyebolts with Nuts—For Lifting
Also known as nut eyebolts, these are designed for through-hole applications.
316 stainless steel are the most corrosion resistant eyebolts.
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.
Eye Nuts—For Lifting
Create your own lifting eye by adding an eye nut to a stud or bolt.
316 stainless steel are the most corrosion resistant eye nuts.
Note: Capacity applies to the eye nut only. The stud or bolt you use will affect the overall capacity. Eye nuts 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.