About Rounded Head Screws
More
About Socket Head Screws
More
About Hex Head Screws and Bolts
More
About Flat Head Screws
More
Left-Hand Threaded High-Strength Steel Hex Head Screws
Tighten these screws by turning them to the left; once fastened, they prevent counterclockwise-moving parts from loosening. Made from Grade 8 steel, they are at least 25% stronger than medium-strength steel screws. The zinc yellow-chromate plating resists corrosion in wet environments. Material meets SAE J429 specifications for quality. Grade 8 steel hex head screws are marked with six radial lines. Length is measured from under the head.
For technical drawings and 3-D models, click on a part number.
Head | ||||||||
|---|---|---|---|---|---|---|---|---|
| Lg. | Threading | Thread Spacing | Wd. | Ht. | Tensile Strength, psi | Specifications Met | Each | |
Zinc Yellow-Chromate Plated Grade 8 Steel | ||||||||
1/4"-20 | ||||||||
| 3/4" | Fully Threaded | Coarse | 7/16" | 11/64" | 150,000 | SAE J429 | 000000000 | 000000 |
| 1" | Fully Threaded | Coarse | 7/16" | 11/64" | 150,000 | SAE J429 | 000000000 | 00000 |
| 1 1/4" | Fully Threaded | Coarse | 7/16" | 11/64" | 150,000 | SAE J429 | 000000000 | 00000 |
| 1 1/2" | Fully Threaded | Coarse | 7/16" | 11/64" | 150,000 | SAE J429 | 000000000 | 00000 |
| 2" | Fully Threaded | Coarse | 7/16" | 11/64" | 150,000 | SAE J429 | 000000000 | 00000 |
| 2 1/2" | Fully Threaded | Coarse | 7/16" | 11/64" | 150,000 | SAE J429 | 000000000 | 00000 |
| 3" | Fully Threaded | Coarse | 7/16" | 11/64" | 150,000 | SAE J429 | 000000000 | 00000 |
5/16"-18 | ||||||||
| 3/4" | Fully Threaded | Coarse | 1/2" | 7/32" | 150,000 | SAE J429 | 000000000 | 00000 |
| 1" | Fully Threaded | Coarse | 1/2" | 7/32" | 150,000 | SAE J429 | 000000000 | 00000 |
| 1 1/2" | Fully Threaded | Coarse | 1/2" | 7/32" | 150,000 | SAE J429 | 000000000 | 00000 |
| 2" | Fully Threaded | Coarse | 1/2" | 7/32" | 150,000 | SAE J429 | 000000000 | 00000 |
| 2 1/2" | Fully Threaded | Coarse | 1/2" | 7/32" | 150,000 | SAE J429 | 000000000 | 00000 |
3/8"-16 | ||||||||
| 1" | Fully Threaded | Coarse | 9/16" | 1/4" | 150,000 | SAE J429 | 000000000 | 00000 |
| 1 1/4" | Fully Threaded | Coarse | 9/16" | 1/4" | 150,000 | SAE J429 | 000000000 | 00000 |
| 1 1/2" | Fully Threaded | Coarse | 9/16" | 1/4" | 150,000 | SAE J429 | 000000000 | 00000 |
| 1 3/4" | Fully Threaded | Coarse | 9/16" | 1/4" | 150,000 | SAE J429 | 000000000 | 00000 |
| 2" | Fully Threaded | Coarse | 9/16" | 1/4" | 150,000 | SAE J429 | 000000000 | 00000 |
| 2 1/2" | Fully Threaded | Coarse | 9/16" | 1/4" | 150,000 | SAE J429 | 000000000 | 00000 |
| 3" | Fully Threaded | Coarse | 9/16" | 1/4" | 150,000 | SAE J429 | 000000000 | 00000 |
| 4" | Fully Threaded | Coarse | 9/16" | 1/4" | 150,000 | SAE J429 | 000000000 | 00000 |
3/8"-24 | ||||||||
| 1" | Fully Threaded | Fine | 9/16" | 15/64" | 150,000 | SAE J429 | 000000000 | 00000 |
7/16"-14 | ||||||||
| 1 1/2" | Fully Threaded | Coarse | 5/8" | 9/32" | 150,000 | SAE J429 | 000000000 | 00000 |
1/2"-13 | ||||||||
| 1 1/2" | Fully Threaded | Coarse | 3/4" | 11/32" | 150,000 | SAE J429 | 000000000 | 00000 |
| 1 3/4" | Fully Threaded | Coarse | 3/4" | 11/32" | 150,000 | SAE J429 | 000000000 | 00000 |
| 2" | Fully Threaded | Coarse | 3/4" | 11/32" | 150,000 | SAE J429 | 000000000 | 00000 |
| 2 1/4" | Fully Threaded | Coarse | 3/4" | 11/32" | 150,000 | SAE J429 | 000000000 | 00000 |
| 2 1/2" | Fully Threaded | Coarse | 3/4" | 11/32" | 150,000 | SAE J429 | 000000000 | 00000 |
| 3" | Fully Threaded | Coarse | 3/4" | 11/32" | 150,000 | SAE J429 | 000000000 | 00000 |
| 3 1/2" | Fully Threaded | Coarse | 3/4" | 11/32" | 150,000 | SAE J429 | 000000000 | 00000 |
| 4" | Fully Threaded | Coarse | 3/4" | 11/32" | 150,000 | SAE J429 | 000000000 | 00000 |
| 4 1/2" | Fully Threaded | Coarse | 3/4" | 11/32" | 150,000 | SAE J429 | 000000000 | 00000 |
1/2"-20 | ||||||||
| 1 1/2" | Fully Threaded | Fine | 3/4" | 5/16" | 150,000 | SAE J429 | 000000000 | 00000 |
5/8"-11 | ||||||||
| 1 1/2" | Fully Threaded | Coarse | 15/16" | 27/64" | 150,000 | SAE J429 | 000000000 | 00000 |
| 1 3/4" | Fully Threaded | Coarse | 15/16" | 27/64" | 150,000 | SAE J429 | 000000000 | 00000 |
| 2" | Fully Threaded | Coarse | 15/16" | 27/64" | 150,000 | SAE J429 | 000000000 | 00000 |
| 2 1/2" | Fully Threaded | Coarse | 15/16" | 27/64" | 150,000 | SAE J429 | 000000000 | 00000 |
| 3" | Fully Threaded | Coarse | 15/16" | 27/64" | 150,000 | SAE J429 | 000000000 | 00000 |
| 4" | Fully Threaded | Coarse | 15/16" | 27/64" | 150,000 | SAE J429 | 000000000 | 00000 |
3/4"-10 | ||||||||
| 1 1/2" | Fully Threaded | Coarse | 1 1/8" | 1/2" | 150,000 | SAE J429 | 000000000 | 00000 |
| 2" | Fully Threaded | Coarse | 1 1/8" | 1/2" | 150,000 | SAE J429 | 000000000 | 00000 |
| 2 1/2" | Fully Threaded | Coarse | 1 1/8" | 1/2" | 150,000 | SAE J429 | 000000000 | 00000 |
| 3" | Fully Threaded | Coarse | 1 1/8" | 1/2" | 150,000 | SAE J429 | 000000000 | 00000 |
| 4" | Fully Threaded | Coarse | 1 1/8" | 1/2" | 150,000 | SAE J429 | 000000000 | 00000 |
Left-Hand Threaded Medium-Strength Metric Class 8.8 Steel Hex Head Screws
These Class 8.8 steel screws are suitable for fastening machinery and equipment. Tighten them by turning them to the left; once fastened, they prevent counterclockwise-moving parts from loosening. Material meets ISO 898-1 specifications for quality. Dimensions meet ASME B18.2.3.1M specifications. Length is measured from under the head.
Zinc-plated steel screws resist corrosion in wet environments.
For technical drawings and 3-D models, click on a part number.
Head | ||||||||
|---|---|---|---|---|---|---|---|---|
| Lg., mm | Threading | Wd., mm | Ht., mm | Thread Spacing | Tensile Strength, psi | Specifications Met | Each | |
Class 8.8 Steel | ||||||||
M6 × 1 mm | ||||||||
| 12 | Fully Threaded | 10 | 4 | Coarse | 110,000 | ASME B18.2.3.1M, ISO 898-1 | 000000000 | 000000 |
| 16 | Fully Threaded | 10 | 4 | Coarse | 110,000 | ASME B18.2.3.1M, ISO 898-1 | 000000000 | 00000 |
| 20 | Fully Threaded | 10 | 4 | Coarse | 110,000 | ASME B18.2.3.1M, ISO 898-1 | 000000000 | 00000 |
| 25 | Fully Threaded | 10 | 4 | Coarse | 110,000 | ASME B18.2.3.1M, ISO 898-1 | 000000000 | 00000 |
| 30 | Fully Threaded | 10 | 4 | Coarse | 110,000 | ASME B18.2.3.1M, ISO 898-1 | 000000000 | 00000 |
M8 × 1.25 mm | ||||||||
| 16 | Fully Threaded | 13 | 5.3 | Coarse | 110,000 | ASME B18.2.3.1M, ISO 898-1 | 000000000 | 00000 |
| 20 | Fully Threaded | 13 | 5.3 | Coarse | 110,000 | ASME B18.2.3.1M, ISO 898-1 | 000000000 | 00000 |
| 25 | Fully Threaded | 13 | 5.3 | Coarse | 110,000 | ASME B18.2.3.1M, ISO 898-1 | 000000000 | 00000 |
| 30 | Fully Threaded | 13 | 5.3 | Coarse | 110,000 | ASME B18.2.3.1M, ISO 898-1 | 000000000 | 00000 |
| 35 | Fully Threaded | 13 | 5.3 | Coarse | 110,000 | ASME B18.2.3.1M, ISO 898-1 | 000000000 | 00000 |
| 40 | Fully Threaded | 13 | 5.3 | Coarse | 110,000 | ASME B18.2.3.1M, ISO 898-1 | 000000000 | 00000 |
M10 × 1.5 mm | ||||||||
| 20 | Fully Threaded | 17 | 6.4 | Coarse | 110,000 | ASME B18.2.3.1M, ISO 898-1 | 000000000 | 00000 |
| 25 | Fully Threaded | 17 | 6.4 | Coarse | 110,000 | ASME B18.2.3.1M, ISO 898-1 | 000000000 | 00000 |
| 30 | Fully Threaded | 17 | 6.4 | Coarse | 110,000 | ASME B18.2.3.1M, ISO 898-1 | 000000000 | 00000 |
| 35 | Fully Threaded | 17 | 6.4 | Coarse | 110,000 | ASME B18.2.3.1M, ISO 898-1 | 000000000 | 00000 |
| 40 | Fully Threaded | 17 | 6.4 | Coarse | 110,000 | ASME B18.2.3.1M, ISO 898-1 | 000000000 | 00000 |
M12 × 1.75 mm | ||||||||
| 25 | Fully Threaded | 19 | 7.5 | Coarse | 110,000 | ASME B18.2.3.1M, ISO 898-1 | 000000000 | 00000 |
| 30 | Fully Threaded | 19 | 7.5 | Coarse | 110,000 | ASME B18.2.3.1M, ISO 898-1 | 000000000 | 00000 |
| 35 | Fully Threaded | 19 | 7.5 | Coarse | 110,000 | ASME B18.2.3.1M, ISO 898-1 | 000000000 | 00000 |
| 40 | Fully Threaded | 19 | 7.5 | Coarse | 110,000 | ASME B18.2.3.1M, ISO 898-1 | 000000000 | 00000 |
| 50 | Fully Threaded | 19 | 7.5 | Coarse | 110,000 | ASME B18.2.3.1M, ISO 898-1 | 000000000 | 00000 |
M16 × 2 mm | ||||||||
| 50 | Fully Threaded | 24 | 10 | Coarse | 110,000 | ASME B18.2.3.1M, ISO 898-1 | 000000000 | 00000 |
Zinc-Plated Class 8.8 Steel | ||||||||
M6 × 1 mm | ||||||||
| 12 | Fully Threaded | 10 | 4 | Coarse | 110,000 | ASME B18.2.3.1M, ISO 898-1 | 000000000 | 00000 |
| 16 | Fully Threaded | 10 | 4 | Coarse | 110,000 | ASME B18.2.3.1M, ISO 898-1 | 000000000 | 00000 |
| 20 | Fully Threaded | 10 | 4 | Coarse | 110,000 | ASME B18.2.3.1M, ISO 898-1 | 000000000 | 00000 |
| 25 | Fully Threaded | 10 | 4 | Coarse | 110,000 | ASME B18.2.3.1M, ISO 898-1 | 000000000 | 00000 |
| 30 | Fully Threaded | 10 | 4 | Coarse | 110,000 | ASME B18.2.3.1M, ISO 898-1 | 000000000 | 00000 |
M8 × 1.25 mm | ||||||||
| 16 | Fully Threaded | 13 | 5.3 | Coarse | 110,000 | ASME B18.2.3.1M, ISO 898-1 | 000000000 | 00000 |
| 20 | Fully Threaded | 13 | 5.3 | Coarse | 110,000 | ASME B18.2.3.1M, ISO 898-1 | 000000000 | 00000 |
| 25 | Fully Threaded | 13 | 5.3 | Coarse | 110,000 | ASME B18.2.3.1M, ISO 898-1 | 000000000 | 00000 |
| 30 | Fully Threaded | 13 | 5.3 | Coarse | 110,000 | ASME B18.2.3.1M, ISO 898-1 | 000000000 | 00000 |
| 35 | Fully Threaded | 13 | 5.3 | Coarse | 110,000 | ASME B18.2.3.1M, ISO 898-1 | 000000000 | 00000 |
| 40 | Fully Threaded | 13 | 5.3 | Coarse | 110,000 | ASME B18.2.3.1M, ISO 898-1 | 000000000 | 00000 |
M10 × 1.5 mm | ||||||||
| 20 | Fully Threaded | 17 | 6.4 | Coarse | 110,000 | ASME B18.2.3.1M, ISO 898-1 | 000000000 | 00000 |
| 25 | Fully Threaded | 17 | 6.4 | Coarse | 110,000 | ASME B18.2.3.1M, ISO 898-1 | 000000000 | 00000 |
| 30 | Fully Threaded | 17 | 6.4 | Coarse | 110,000 | ASME B18.2.3.1M, ISO 898-1 | 000000000 | 00000 |
| 35 | Fully Threaded | 17 | 6.4 | Coarse | 110,000 | ASME B18.2.3.1M, ISO 898-1 | 000000000 | 00000 |
| 40 | Fully Threaded | 17 | 6.4 | Coarse | 110,000 | ASME B18.2.3.1M, ISO 898-1 | 000000000 | 00000 |
M12 × 1.75 mm | ||||||||
| 25 | Fully Threaded | 19 | 7.5 | Coarse | 110,000 | ASME B18.2.3.1M, ISO 898-1 | 000000000 | 00000 |
| 30 | Fully Threaded | 19 | 7.5 | Coarse | 110,000 | ASME B18.2.3.1M, ISO 898-1 | 000000000 | 00000 |
| 35 | Fully Threaded | 19 | 7.5 | Coarse | 110,000 | ASME B18.2.3.1M, ISO 898-1 | 000000000 | 00000 |
| 40 | Fully Threaded | 19 | 7.5 | Coarse | 110,000 | ASME B18.2.3.1M, ISO 898-1 | 000000000 | 00000 |
Left-Hand Threaded Medium-Strength Grade 5 Steel Hex Head Screws
Made from Grade 5 steel, these screws are suitable for fastening machinery and equipment. Tighten them by turning them to the left; once fastened, they prevent counterclockwise-moving parts from loosening. Material meets SAE J429 specifications for quality. Dimensions meet ASME B18.2.1 specifications. Grade 5 steel hex head screws are marked with three radial lines. Length is measured from under the head.
For technical drawings and 3-D models, click on a part number.
Head | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Lg. | Threading | Min. Thread Lg. | Thread Spacing | Wd. | Ht. | Tensile Strength, psi | Specifications Met | Each | |
Grade 5 Steel | |||||||||
3/8"-16 | |||||||||
| 1 1/2" | Fully Threaded | __ | Coarse | 9/16" | 1/4" | 110,000 | ASME B18.2.1, SAE J429 | 000000000 | 00000 |
| 1 3/4" | Fully Threaded | __ | Coarse | 9/16" | 1/4" | 110,000 | ASME B18.2.1, SAE J429 | 000000000 | 0000 |
| 2" | Fully Threaded | __ | Coarse | 9/16" | 1/4" | 110,000 | ASME B18.2.1, SAE J429 | 000000000 | 0000 |
| 2 1/2" | Fully Threaded | __ | Coarse | 9/16" | 1/4" | 110,000 | ASME B18.2.1, SAE J429 | 000000000 | 0000 |
| 3" | Fully Threaded | __ | Coarse | 9/16" | 1/4" | 110,000 | ASME B18.2.1, SAE J429 | 000000000 | 00000 |
1/2"-13 | |||||||||
| 1 1/2" | Fully Threaded | __ | Coarse | 3/4" | 11/32" | 110,000 | ASME B18.2.1, SAE J429 | 000000000 | 0000 |
| 1 3/4" | Fully Threaded | __ | Coarse | 3/4" | 11/32" | 110,000 | ASME B18.2.1, SAE J429 | 000000000 | 0000 |
| 2" | Fully Threaded | __ | Coarse | 3/4" | 11/32" | 110,000 | ASME B18.2.1, SAE J429 | 000000000 | 0000 |
| 2 1/2" | Fully Threaded | __ | Coarse | 3/4" | 11/32" | 110,000 | ASME B18.2.1, SAE J429 | 000000000 | 00000 |
| 3" | Fully Threaded | __ | Coarse | 3/4" | 11/32" | 110,000 | ASME B18.2.1, SAE J429 | 000000000 | 00000 |
| 4" | Fully Threaded | __ | Coarse | 3/4" | 11/32" | 110,000 | ASME B18.2.1, SAE J429 | 000000000 | 00000 |
5/8"-11 | |||||||||
| 1 1/2" | Fully Threaded | __ | Coarse | 15/16" | 27/64" | 110,000 | ASME B18.2.1, SAE J429 | 000000000 | 00000 |
| 2" | Fully Threaded | __ | Coarse | 15/16" | 27/64" | 110,000 | ASME B18.2.1, SAE J429 | 000000000 | 00000 |
| 3" | Fully Threaded | __ | Coarse | 15/16" | 27/64" | 110,000 | ASME B18.2.1, SAE J429 | 000000000 | 00000 |
| 4" | Partially Threaded | 1 1/2" | Coarse | 15/16" | 27/64" | 110,000 | ASME B18.2.1, SAE J429 | 000000000 | 00000 |
3/4"-10 | |||||||||
| 1 1/2" | Fully Threaded | __ | Coarse | 1 1/8" | 1/2" | 110,000 | ASME B18.2.1, SAE J429 | 000000000 | 00000 |
| 4" | Partially Threaded | 1 3/4" | Coarse | 1 1/8" | 1/2" | 110,000 | ASME B18.2.1, SAE J429 | 000000000 | 00000 |
Left-Hand Threaded 18-8 Stainless Steel Hex Head Screws
Tighten these screws by turning them to the left; once fastened, they prevent counterclockwise-moving parts from loosening. Made from 18-8 stainless steel, they have good chemical resistance and may be mildly magnetic. Length is measured from under the head.
For technical drawings and 3-D models, click on a part number.
Head | |||||||
|---|---|---|---|---|---|---|---|
| Lg. | Threading | Thread Spacing | Wd. | Ht. | Tensile Strength, psi | Each | |
1/4"-20 | |||||||
| 1/2" | Fully Threaded | Coarse | 7/16" | 11/64" | 70,000 | 000000000 | 000000 |
| 3/4" | Fully Threaded | Coarse | 7/16" | 11/64" | 70,000 | 000000000 | 00000 |
| 1" | Fully Threaded | Coarse | 7/16" | 11/64" | 70,000 | 000000000 | 00000 |
| 1 1/4" | Fully Threaded | Coarse | 7/16" | 11/64" | 70,000 | 000000000 | 00000 |
| 1 1/2" | Fully Threaded | Coarse | 7/16" | 11/64" | 70,000 | 000000000 | 00000 |
3/8"-16 | |||||||
| 3/4" | Fully Threaded | Coarse | 9/16" | 1/4" | 70,000 | 000000000 | 00000 |
| 1" | Fully Threaded | Coarse | 9/16" | 1/4" | 70,000 | 000000000 | 00000 |
| 1 1/2" | Fully Threaded | Coarse | 9/16" | 1/4" | 70,000 | 000000000 | 00000 |
| 2" | Fully Threaded | Coarse | 9/16" | 1/4" | 70,000 | 000000000 | 00000 |
1/2"-13 | |||||||
| 1" | Fully Threaded | Coarse | 3/4" | 11/32" | 70,000 | 000000000 | 00000 |
| 1 1/2" | Fully Threaded | Coarse | 3/4" | 11/32" | 70,000 | 000000000 | 00000 |
| 2" | Fully Threaded | Coarse | 3/4" | 11/32" | 70,000 | 000000000 | 00000 |
| 2 1/2" | Fully Threaded | Coarse | 3/4" | 11/32" | 70,000 | 000000000 | 00000 |
| 3" | Fully Threaded | Coarse | 3/4" | 11/32" | 70,000 | 000000000 | 00000 |
Left-Hand Threaded Alloy Steel Socket Head Screws
Tighten these screws by turning them to the left; once fastened, they prevent counterclockwise-moving parts from loosening. With a tensile strength of 170,000 psi, these alloy steel screws are stronger than Grade 8 steel screws. Their black-oxide finish provides mild corrosion resistance in dry environments. Length is measured from under the head.
Coarse threads are the industry standard; choose these screws if you don’t know the pitch or threads per inch. Fine threads are closely spaced to prevent loosening from vibration. They are not compatible with coarse threads.
Screws that meet ASTM A574 comply with specifications and testing requirements for material quality. Screws that meet 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. | Threading | Thread Spacing | Dia. | Ht. | Drive Size | Tensile Strength, psi | Specifications Met | Each | |
Black-Oxide Alloy Steel | |||||||||
6-32 | |||||||||
| 3/8" | Fully Threaded | Coarse | 0.226" | 0.138" | 7/64" | 170,000 | ASTM A574 | 000000000 | 000000 |
| 1/2" | Fully Threaded | Coarse | 0.226" | 0.138" | 7/64" | 170,000 | ASTM A574 | 000000000 | 00000 |
8-32 | |||||||||
| 1/2" | Fully Threaded | Coarse | 0.27" | 0.164" | 9/64" | 170,000 | ASTM A574 | 000000000 | 0000 |
| 1" | Fully Threaded | Coarse | 0.27" | 0.164" | 9/64" | 170,000 | ASTM A574 | 000000000 | 00000 |
10-32 | |||||||||
| 1/2" | Fully Threaded | Fine | 5/16" | 0.19" | 5/32" | 170,000 | ASTM A574 | 000000000 | 0000 |
| 3/4" | Fully Threaded | Fine | 5/16" | 0.19" | 5/32" | 170,000 | ASTM A574 | 000000000 | 0000 |
| 1" | Fully Threaded | Fine | 5/16" | 0.19" | 5/32" | 170,000 | ASTM A574 | 000000000 | 00000 |
| 1 1/2" | Fully Threaded | Fine | 5/16" | 0.19" | 5/32" | 170,000 | ASTM A574 | 000000000 | 00000 |
1/4"-20 | |||||||||
| 1/2" | Fully Threaded | Coarse | 3/8" | 1/4" | 3/16" | 170,000 | ASTM A574 | 000000000 | 0000 |
| 5/8" | Fully Threaded | Coarse | 3/8" | 1/4" | 3/16" | 170,000 | ASTM A574 | 000000000 | 0000 |
| 3/4" | Fully Threaded | Coarse | 3/8" | 1/4" | 3/16" | 170,000 | ASTM A574 | 000000000 | 0000 |
| 1" | Fully Threaded | Coarse | 3/8" | 1/4" | 3/16" | 170,000 | ASTM A574 | 000000000 | 00000 |
| 1 1/4" | Fully Threaded | Coarse | 3/8" | 1/4" | 3/16" | 170,000 | ASTM A574 | 000000000 | 00000 |
| 1 1/2" | Fully Threaded | Coarse | 3/8" | 1/4" | 3/16" | 170,000 | ASTM A574 | 000000000 | 00000 |
5/16"-18 | |||||||||
| 3/4" | Fully Threaded | Coarse | 15/32" | 5/16" | 1/4" | 170,000 | ASTM A574 | 000000000 | 00000 |
| 1" | Fully Threaded | Coarse | 15/32" | 5/16" | 1/4" | 170,000 | ASTM A574 | 000000000 | 00000 |
| 1 1/4" | Fully Threaded | Coarse | 15/32" | 5/16" | 1/4" | 170,000 | ASTM A574 | 000000000 | 00000 |
| 1 1/2" | Fully Threaded | Coarse | 15/32" | 5/16" | 1/4" | 170,000 | ASTM A574 | 000000000 | 00000 |
| 2" | Fully Threaded | Coarse | 15/32" | 5/16" | 1/4" | 170,000 | ASTM A574 | 000000000 | 00000 |
3/8"-16 | |||||||||
| 3/4" | Fully Threaded | Coarse | 9/16" | 3/8" | 5/16" | 170,000 | ASTM A574 | 000000000 | 00000 |
| 1" | Fully Threaded | Coarse | 9/16" | 3/8" | 5/16" | 170,000 | ASTM A574 | 000000000 | 00000 |
| 1 1/4" | Fully Threaded | Coarse | 9/16" | 3/8" | 5/16" | 170,000 | ASTM A574 | 000000000 | 00000 |
1/2"-13 | |||||||||
| 1" | Fully Threaded | Coarse | 3/4" | 1/2" | 3/8" | 170,000 | ASTM A574 | 000000000 | 00000 |
| 1 1/2" | Fully Threaded | Coarse | 3/4" | 1/2" | 3/8" | 170,000 | ASTM A574 | 000000000 | 00000 |
| 2" | Fully Threaded | Coarse | 3/4" | 1/2" | 3/8" | 170,000 | ASTM A574 | 000000000 | 00000 |
Head | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Lg., mm | Threading | Min. Thread Lg., mm | Thread Spacing | Dia., mm | Ht., mm | Drive Size, mm | Tensile Strength, psi | Specifications Met | Each | |
Black-Oxide Class 12.9 Alloy Steel | ||||||||||
M4 × 0.7 mm | ||||||||||
| 6 | Fully Threaded | __ | Coarse | 7 | 4 | 3 | 170,000 | DIN 912, ISO 4762 | 000000000 | 000000 |
| 8 | Fully Threaded | __ | Coarse | 7 | 4 | 3 | 170,000 | DIN 912, ISO 4762 | 000000000 | 00000 |
| 10 | Fully Threaded | __ | Coarse | 7 | 4 | 3 | 170,000 | DIN 912, ISO 4762 | 000000000 | 00000 |
| 12 | Fully Threaded | __ | Coarse | 7 | 4 | 3 | 170,000 | DIN 912, ISO 4762 | 000000000 | 00000 |
| 16 | Fully Threaded | __ | Coarse | 7 | 4 | 3 | 170,000 | DIN 912, ISO 4762 | 000000000 | 00000 |
| 20 | Fully Threaded | __ | Coarse | 7 | 4 | 3 | 170,000 | DIN 912, ISO 4762 | 000000000 | 00000 |
M5 × 0.8 mm | ||||||||||
| 12 | Fully Threaded | __ | Coarse | 8.5 | 5 | 4 | 170,000 | DIN 912, ISO 4762 | 000000000 | 00000 |
| 16 | Fully Threaded | __ | Coarse | 8.5 | 5 | 4 | 170,000 | DIN 912, ISO 4762 | 000000000 | 00000 |
| 20 | Fully Threaded | __ | Coarse | 8.5 | 5 | 4 | 170,000 | DIN 912, ISO 4762 | 000000000 | 00000 |
| 25 | Partially Threaded | 22 | Coarse | 8.5 | 5 | 4 | 170,000 | DIN 912, ISO 4762 | 000000000 | 00000 |
M6 × 1 mm | ||||||||||
| 12 | Fully Threaded | __ | Coarse | 10 | 6 | 5 | 170,000 | DIN 912, ISO 4762 | 000000000 | 00000 |
| 16 | Fully Threaded | __ | Coarse | 10 | 6 | 5 | 170,000 | DIN 912, ISO 4762 | 000000000 | 00000 |
| 20 | Fully Threaded | __ | Coarse | 10 | 6 | 5 | 170,000 | DIN 912, ISO 4762 | 000000000 | 00000 |
| 25 | Partially Threaded | 24 | Coarse | 10 | 6 | 5 | 170,000 | DIN 912, ISO 4762 | 000000000 | 00000 |
| 30 | Partially Threaded | 24 | Coarse | 10 | 6 | 5 | 170,000 | DIN 912, ISO 4762 | 000000000 | 00000 |
M8 × 1.25 mm | ||||||||||
| 16 | Fully Threaded | __ | Coarse | 13 | 8 | 6 | 170,000 | DIN 912, ISO 4762 | 000000000 | 00000 |
| 20 | Fully Threaded | __ | Coarse | 13 | 8 | 6 | 170,000 | DIN 912, ISO 4762 | 000000000 | 00000 |
| 25 | Fully Threaded | __ | Coarse | 13 | 8 | 6 | 170,000 | DIN 912, ISO 4762 | 000000000 | 00000 |
| 30 | Partially Threaded | 28 | Coarse | 13 | 8 | 6 | 170,000 | DIN 912, ISO 4762 | 000000000 | 00000 |
| 35 | Partially Threaded | 28 | Coarse | 13 | 8 | 6 | 170,000 | DIN 912, ISO 4762 | 000000000 | 00000 |
| 40 | Partially Threaded | 28 | Coarse | 13 | 8 | 6 | 170,000 | DIN 912, ISO 4762 | 000000000 | 00000 |
M10 × 1.5 mm | ||||||||||
| 20 | Fully Threaded | __ | Coarse | 16 | 10 | 8 | 170,000 | DIN 912, ISO 4762 | 000000000 | 00000 |
| 25 | Fully Threaded | __ | Coarse | 16 | 10 | 8 | 170,000 | DIN 912, ISO 4762 | 000000000 | 00000 |
| 30 | Fully Threaded | __ | Coarse | 16 | 10 | 8 | 170,000 | DIN 912, ISO 4762 | 000000000 | 00000 |
| 35 | Partially Threaded | 32 | Coarse | 16 | 10 | 8 | 170,000 | DIN 912, ISO 4762 | 000000000 | 00000 |
| 40 | Partially Threaded | 32 | Coarse | 16 | 10 | 8 | 170,000 | DIN 912, ISO 4762 | 000000000 | 00000 |
M12 × 1.75 mm | ||||||||||
| 25 | Fully Threaded | __ | Coarse | 18 | 12 | 10 | 170,000 | DIN 912, ISO 4762 | 000000000 | 00000 |
| 30 | Fully Threaded | __ | Coarse | 18 | 12 | 10 | 170,000 | DIN 912, ISO 4762 | 000000000 | 00000 |
| 40 | Partially Threaded | 36 | Coarse | 18 | 12 | 10 | 170,000 | DIN 912, ISO 4762 | 000000000 | 00000 |
| 50 | Partially Threaded | 36 | Coarse | 18 | 12 | 10 | 170,000 | DIN 912, ISO 4762 | 000000000 | 00000 |
Left-Hand Threaded 18-8 Stainless Steel Socket Head Screws
Tighten these screws by turning them to the left; once fastened, they prevent counterclockwise-moving parts from loosening. Made from 18-8 stainless steel, they have good chemical resistance and may be mildly magnetic. Length is measured from under the head.
Coarse threads are the industry standard; choose these screws if you don’t know the threads per inch. Fine threads are closely spaced to prevent loosening from vibration. They are not compatible with coarse threads.
For technical drawings and 3-D models, click on a part number.
Head | ||||||||
|---|---|---|---|---|---|---|---|---|
| Lg. | Threading | Thread Spacing | Dia. | Ht. | Drive Size | Tensile Strength, psi | Each | |
18-8 Stainless Steel | ||||||||
8-32 | ||||||||
| 3/8" | Fully Threaded | Coarse | 0.27" | 0.164" | 9/64" | 70,000 | 000000000 | 000000 |
| 1/2" | Fully Threaded | Coarse | 0.27" | 0.164" | 9/64" | 70,000 | 000000000 | 00000 |
| 3/4" | Fully Threaded | Coarse | 0.27" | 0.164" | 9/64" | 70,000 | 000000000 | 00000 |
10-32 | ||||||||
| 1/2" | Fully Threaded | Fine | 5/16" | 0.19" | 5/32" | 70,000 | 000000000 | 00000 |
| 3/4" | Fully Threaded | Fine | 5/16" | 0.19" | 5/32" | 70,000 | 000000000 | 00000 |
| 1" | Fully Threaded | Fine | 5/16" | 0.19" | 5/32" | 70,000 | 000000000 | 00000 |
1/4"-20 | ||||||||
| 1/2" | Fully Threaded | Coarse | 3/8" | 1/4" | 3/16" | 70,000 | 000000000 | 00000 |
| 5/8" | Fully Threaded | Coarse | 3/8" | 1/4" | 3/16" | 70,000 | 000000000 | 00000 |
| 3/4" | Fully Threaded | Coarse | 3/8" | 1/4" | 3/16" | 70,000 | 000000000 | 00000 |
| 1" | Fully Threaded | Coarse | 3/8" | 1/4" | 3/16" | 70,000 | 000000000 | 00000 |
| 1 1/4" | Fully Threaded | Coarse | 3/8" | 1/4" | 3/16" | 70,000 | 000000000 | 00000 |
| 1 1/2" | Fully Threaded | Coarse | 3/8" | 1/4" | 3/16" | 70,000 | 000000000 | 00000 |
| 2" | Fully Threaded | Coarse | 3/8" | 1/4" | 3/16" | 70,000 | 000000000 | 00000 |
Metric Left-Hand Threaded Flat Head Screws
Tighten these screws by turning them to the left; once fastened, they prevent loosening from counterclockwise motion. Made from 18-8 stainless steel, they have good chemical resistance and may be mildly magnetic. All are passivated for added protection against oxidation and corrosion. They’re angled under the head to sit flush within countersunk holes. Length is measured from the top of the head.
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 | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | ||||||||
|---|---|---|---|---|---|---|---|---|
M3 × 0.5 mm | ||||||||
| 6 | Fully Threaded | 6.00 | 1.70 | 2 | 70,000 | 5 | 000000000 | 00000 |
| 10 | Fully Threaded | 6.00 | 1.70 | 2 | 70,000 | 5 | 000000000 | 00000 |
M4 × 0.7 mm | ||||||||
| 8 | Fully Threaded | 8.00 | 2.30 | 2.5 | 70,000 | 5 | 000000000 | 00000 |
| 12 | Fully Threaded | 8.00 | 2.30 | 2.5 | 70,000 | 5 | 000000000 | 00000 |
M5 × 0.8 mm | ||||||||
| 10 | Fully Threaded | 10.00 | 2.80 | 3 | 70,000 | 1 | 000000000 | 0000 |
| 16 | Fully Threaded | 10.00 | 2.80 | 3 | 70,000 | 1 | 000000000 | 0000 |
M6 × 1 mm | ||||||||
| 12 | Fully Threaded | 12.00 | 3.30 | 4 | 70,000 | 1 | 000000000 | 0000 |
| 20 | Fully Threaded | 12.00 | 3.30 | 4 | 70,000 | 1 | 000000000 | 0000 |
M8 × 1.25 mm | ||||||||
| 16 | Fully Threaded | 16.00 | 4.40 | 5 | 70,000 | 1 | 000000000 | 0000 |
| 25 | Fully Threaded | 16.00 | 4.40 | 5 | 70,000 | 1 | 000000000 | 0000 |
Left-Hand Threaded Flat Head Screws
Tighten these screws by turning them to the left; once fastened, they prevent loosening from counterclockwise motion. Made from 18-8 stainless steel, they have good chemical resistance and may be mildly magnetic. All are passivated for added protection against oxidation and corrosion. They’re angled under the head to sit flush within countersunk holes. Length is measured from the top of the head.
For technical drawings and 3-D models, click on a part number.
| Lg. | Threading | Head Dia. | Head Ht. | Drive Size | Tensile Strength, psi | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | ||||||||
|---|---|---|---|---|---|---|---|---|
4-40 | ||||||||
| 1/4" | Fully Threaded | 0.255" | 0.083" | 1/16" | 70,000 | 5 | 000000000 | 00000 |
| 1/2" | Fully Threaded | 0.255" | 0.083" | 1/16" | 70,000 | 5 | 000000000 | 00000 |
6-32 | ||||||||
| 1/4" | Fully Threaded | 0.307" | 0.097" | 5/64" | 70,000 | 5 | 000000000 | 0000 |
| 1/2" | Fully Threaded | 0.307" | 0.097" | 5/64" | 70,000 | 5 | 000000000 | 0000 |
8-32 | ||||||||
| 1/2" | Fully Threaded | 0.359" | 0.112" | 3/32" | 70,000 | 5 | 000000000 | 00000 |
| 3/4" | Fully Threaded | 0.359" | 0.112" | 3/32" | 70,000 | 5 | 000000000 | 00000 |
10-32 | ||||||||
| 1/2" | Fully Threaded | 0.411" | 0.127" | 1/8" | 70,000 | 1 | 000000000 | 0000 |
| 3/4" | Fully Threaded | 0.411" | 0.127" | 1/8" | 70,000 | 1 | 000000000 | 0000 |
1/4"-20 | ||||||||
| 1/2" | Fully Threaded | 0.531" | 0.161" | 5/32" | 70,000 | 1 | 000000000 | 0000 |
| 1" | Fully Threaded | 0.531" | 0.161" | 5/32" | 70,000 | 1 | 000000000 | 0000 |
Left-Hand Threaded Button Head Screws
Tighten these screws by turning them to the left; once fastened, they prevent loosening from counterclockwise motion. Made from 18-8 stainless steel, these screws have good chemical resistance and may be mildly magnetic. Length is measured from under the head.
For technical drawings and 3-D models, click on a part number.
| Lg. | Threading | Head Dia. | Head Ht. | Drive Size | Tensile Strength, psi | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | ||||||||
|---|---|---|---|---|---|---|---|---|
4-40 | ||||||||
| 1/4" | Fully Threaded | 0.213" | 0.059" | 1/16" | 80,000 | 5 | 000000000 | 00000 |
| 3/8" | Fully Threaded | 0.213" | 0.059" | 1/16" | 80,000 | 5 | 000000000 | 0000 |
| 1/2" | Fully Threaded | 0.213" | 0.059" | 1/16" | 80,000 | 5 | 000000000 | 0000 |
| 3/4" | Fully Threaded | 0.213" | 0.059" | 1/16" | 80,000 | 5 | 000000000 | 00000 |
6-32 | ||||||||
| 3/8" | Fully Threaded | 0.262" | 0.073" | 5/64" | 80,000 | 5 | 000000000 | 0000 |
| 1/2" | Fully Threaded | 0.262" | 0.073" | 5/64" | 80,000 | 5 | 000000000 | 0000 |
| 3/4" | Fully Threaded | 0.262" | 0.073" | 5/64" | 80,000 | 5 | 000000000 | 0000 |
| 1" | Fully Threaded | 0.262" | 0.073" | 5/64" | 80,000 | 5 | 000000000 | 00000 |
8-32 | ||||||||
| 3/8" | Fully Threaded | 0.312" | 0.087" | 3/32" | 80,000 | 5 | 000000000 | 0000 |
| 1/2" | Fully Threaded | 0.312" | 0.087" | 3/32" | 80,000 | 5 | 000000000 | 0000 |
| 3/4" | Fully Threaded | 0.312" | 0.087" | 3/32" | 80,000 | 5 | 000000000 | 00000 |
| 1" | Fully Threaded | 0.312" | 0.087" | 3/32" | 80,000 | 5 | 000000000 | 00000 |
10-32 | ||||||||
| 3/8" | Fully Threaded | 0.361" | 0.101" | 1/8" | 80,000 | 5 | 000000000 | 0000 |
| 1/2" | Fully Threaded | 0.361" | 0.101" | 1/8" | 80,000 | 5 | 000000000 | 00000 |
| 3/4" | Fully Threaded | 0.361" | 0.101" | 1/8" | 80,000 | 5 | 000000000 | 00000 |
| 1" | Fully Threaded | 0.361" | 0.101" | 1/8" | 80,000 | 5 | 000000000 | 00000 |
1/4"-20 | ||||||||
| 3/8" | Fully Threaded | 0.437" | 0.132" | 5/32" | 80,000 | 5 | 000000000 | 00000 |
| 1/2" | Fully Threaded | 0.437" | 0.132" | 5/32" | 80,000 | 5 | 000000000 | 00000 |
| 3/4" | Fully Threaded | 0.437" | 0.132" | 5/32" | 80,000 | 5 | 000000000 | 00000 |
| 1" | Fully Threaded | 0.437" | 0.132" | 5/32" | 80,000 | 5 | 000000000 | 00000 |
Metric Left-Hand Threaded Button Head Screws
Tighten these screws by turning them to the left; once fastened, they prevent loosening from counterclockwise motion. Made from 18-8 stainless steel, they have good chemical resistance and may be mildly magnetic. Length is measured from under the head.
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 | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | ||||||||
|---|---|---|---|---|---|---|---|---|
M3 × 0.5 mm | ||||||||
| 6 | Fully Threaded | 5.70 | 1.65 | 2 | 80,000 | 5 | 000000000 | 00000 |
| 8 | Fully Threaded | 5.70 | 1.65 | 2 | 80,000 | 5 | 000000000 | 0000 |
| 10 | Fully Threaded | 5.70 | 1.65 | 2 | 80,000 | 5 | 000000000 | 0000 |
| 12 | Fully Threaded | 5.70 | 1.65 | 2 | 80,000 | 5 | 000000000 | 00000 |
M4 × 0.7 mm | ||||||||
| 8 | Fully Threaded | 7.60 | 2.20 | 2.5 | 80,000 | 5 | 000000000 | 0000 |
| 10 | Fully Threaded | 7.60 | 2.20 | 2.5 | 80,000 | 5 | 000000000 | 00000 |
| 12 | Fully Threaded | 7.60 | 2.20 | 2.5 | 80,000 | 5 | 000000000 | 00000 |
| 16 | Fully Threaded | 7.60 | 2.20 | 2.5 | 80,000 | 5 | 000000000 | 00000 |
M5 × 0.8 mm | ||||||||
| 10 | Fully Threaded | 9.50 | 2.75 | 3 | 80,000 | 5 | 000000000 | 0000 |
| 12 | Fully Threaded | 9.50 | 2.75 | 3 | 80,000 | 5 | 000000000 | 00000 |
| 16 | Fully Threaded | 9.50 | 2.75 | 3 | 80,000 | 5 | 000000000 | 00000 |
| 20 | Fully Threaded | 9.50 | 2.75 | 3 | 80,000 | 5 | 000000000 | 00000 |
M6 × 1 mm | ||||||||
| 10 | Fully Threaded | 10.50 | 3.30 | 4 | 80,000 | 5 | 000000000 | 00000 |
| 12 | Fully Threaded | 10.50 | 3.30 | 4 | 80,000 | 5 | 000000000 | 00000 |
| 16 | Fully Threaded | 10.50 | 3.30 | 4 | 80,000 | 5 | 000000000 | 00000 |
| 20 | Fully Threaded | 10.50 | 3.30 | 4 | 80,000 | 5 | 000000000 | 00000 |