System of Measurement System of Measurement |
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Material Material |
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Finish Finish |
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Threading Threading |
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 | Fully Threaded |
 | Partially Threaded |
Drive Style Drive Style |
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| Hex | External 12- Point |
Drive Size Drive Size | Show |
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Drive Size Drive Size | Hide |
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Socket Head Profile Socket Head Profile |
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 | Standard |
Tensile Strength Tensile Strength |
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Thread Direction Thread Direction |
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Hardness Hardness |
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Screw Features Screw Features |
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 | Flanged |
About Hex Head Screws and Bolts
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About Socket Head Screws
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About Rounded 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. 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.
Screws that meet ASTM A574, ASTM A574M, and ISO 898-1 comply with specifications and testing requirements for material quality.
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 | Pkg. Qty. | Pkg. | |
9/16"-12 | ||||||||||
Black-Oxide Alloy Steel | ||||||||||
| 1" | Fully Threaded | Coarse | 27/32" | 9/16" | 7/16" | 170,000 | ASTM A574 | 1 | 000000000 | 00000 |
| 1 1/4" | Fully Threaded | Coarse | 27/32" | 9/16" | 7/16" | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
| 1 1/2" | Fully Threaded | Coarse | 27/32" | 9/16" | 7/16" | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
| 1 3/4" | Fully Threaded | Coarse | 27/32" | 9/16" | 7/16" | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
| 2" | Fully Threaded | Coarse | 27/32" | 9/16" | 7/16" | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
| 2 1/4" | Fully Threaded | Coarse | 27/32" | 9/16" | 7/16" | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
| 2 1/2" | Fully Threaded | Coarse | 27/32" | 9/16" | 7/16" | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
| 2 3/4" | Fully Threaded | Coarse | 27/32" | 9/16" | 7/16" | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
| 3" | Fully Threaded | Coarse | 27/32" | 9/16" | 7/16" | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
| 3 1/2" | Fully Threaded | Coarse | 27/32" | 9/16" | 7/16" | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
| 4" | Fully Threaded | Coarse | 27/32" | 9/16" | 7/16" | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
Head | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Threading | Min. Thread Lg. | Thread Spacing | Dia. | Ht. | Drive Size | Tensile Strength, psi | Specifications Met | Pkg. Qty. | Pkg. | |
9/16"-18 | |||||||||||
Black-Oxide Alloy Steel | |||||||||||
| 3/4" | Fully Threaded | __ | Fine | 27/32" | 9/16" | 7/16" | 170,000 | ASTM A574 | 1 | 000000000 | 00000 |
| 1" | Fully Threaded | __ | Fine | 27/32" | 9/16" | 7/16" | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
| 1 1/2" | Fully Threaded | __ | Fine | 27/32" | 9/16" | 7/16" | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
| 1 3/4" | Fully Threaded | __ | Fine | 27/32" | 9/16" | 7/16" | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
| 2" | Fully Threaded | __ | Fine | 27/32" | 9/16" | 7/16" | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
| 2 1/2" | Fully Threaded | __ | Fine | 27/32" | 9/16" | 7/16" | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
| 3" | Partially Threaded | 1 5/8" | Fine | 27/32" | 9/16" | 7/16" | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
| 4" | Partially Threaded | 1 1/2" | Fine | 27/32" | 9/16" | 7/16" | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
18-8 Stainless Steel Socket 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.
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 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. | Threading | Min. Thread Lg. | Thread Spacing | Dia. | Ht. | Drive Size | Tensile Strength, psi | Pkg. Qty. | Pkg. | |
9/16"-12 | ||||||||||
18-8 Stainless Steel | ||||||||||
| 1" | Fully Threaded | __ | Coarse | 27/32" | 9/16" | 7/16" | 70,000 | 1 | 000000000 | 00000 |
| 1 1/2" | Fully Threaded | __ | Coarse | 27/32" | 9/16" | 7/16" | 70,000 | 1 | 000000000 | 00000 |
| 2" | Fully Threaded | __ | Coarse | 27/32" | 9/16" | 7/16" | 70,000 | 1 | 000000000 | 00000 |
| 2 1/2" | Partially Threaded | 1 3/4" | Coarse | 27/32" | 9/16" | 7/16" | 70,000 | 1 | 000000000 | 0000 |
| 3" | Partially Threaded | 1 3/4" | Coarse | 27/32" | 9/16" | 7/16" | 70,000 | 1 | 000000000 | 00000 |
| 4" | Partially Threaded | 1 3/4" | Coarse | 27/32" | 9/16" | 7/16" | 70,000 | 1 | 000000000 | 00000 |
| 5" | Partially Threaded | 1 3/4" | Coarse | 27/32" | 9/16" | 7/16" | 70,000 | 1 | 000000000 | 00000 |
| 6" | Partially Threaded | 1 3/4" | Coarse | 27/32" | 9/16" | 7/16" | 70,000 | 1 | 000000000 | 00000 |
Head | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Threading | Min. Thread Lg. | Thread Spacing | Dia. | Ht. | Drive Size | Tensile Strength, psi | Pkg. Qty. | Pkg. | |
9/16"-18 | ||||||||||
18-8 Stainless Steel | ||||||||||
| 1" | Fully Threaded | __ | Fine | 27/32" | 9/16" | 7/16" | 70,000 | 1 | 000000000 | 000000 |
| 1 1/2" | Fully Threaded | __ | Fine | 27/32" | 9/16" | 7/16" | 70,000 | 1 | 000000000 | 00000 |
| 2" | Fully Threaded | __ | Fine | 27/32" | 9/16" | 7/16" | 70,000 | 1 | 000000000 | 00000 |
| 2 1/2" | Partially Threaded | 1 3/4" | Fine | 27/32" | 9/16" | 7/16" | 70,000 | 1 | 000000000 | 00000 |
| 3" | Partially Threaded | 1 3/4" | Fine | 27/32" | 9/16" | 7/16" | 70,000 | 1 | 000000000 | 00000 |
| 3 1/2" | Partially Threaded | 1 3/4" | Fine | 27/32" | 9/16" | 7/16" | 70,000 | 1 | 000000000 | 00000 |
| 4" | Partially Threaded | 1 3/4" | Fine | 27/32" | 9/16" | 7/16" | 70,000 | 1 | 000000000 | 00000 |
| 5" | Partially Threaded | 1 3/4" | Fine | 27/32" | 9/16" | 7/16" | 70,000 | 1 | 000000000 | 00000 |
| 6" | Partially Threaded | 1 3/4" | Fine | 27/32" | 9/16" | 7/16" | 70,000 | 1 | 000000000 | 00000 |
Alloy Steel Button Head Hex Drive Screws
Made from alloy steel, these screws are nearly twice as strong as stainless steel button head screws. Length is measured from under the head.
Black-oxide alloy steel screws are mildly corrosion resistant in dry environments.
For technical drawings and 3-D models, click on a part number.
Alloy Steel 12-Point Screws
Good for high-strength fastening, these screws are made from steel comparable in strength to Grade 9 steel. Use them for heavy duty stamping applications as well as earth-moving machinery, such as bulldozers and excavators. The head makes 12 points of contact with a wrench to handle more torque than a socket head or hex head screw. The flange distributes pressure where the screw meets the surface, eliminating the need for a separate washer. To install, use a 12-point wrench that matches the head width of your screw. Head height includes the flange. Length is measured from under the flange.
Black-oxide coated screws are mildly corrosion resistant in dry environments. They meet SAE AS9104/1 specifications for quality.
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. Fine threads are closely spaced to prevent loosening from vibration.
Screws that meet IFI 115 comply with these specifications for dimensions.
For technical drawings and 3-D models, click on a part number.
Head | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Threading | Min. Thread Lg. | Thread Spacing | Wd. | Ht. | Flange Dia. | Tensile Strength, psi | Specifications Met | Pkg. Qty. | Pkg. | |
Alloy Steel | |||||||||||
7/16"-14 | |||||||||||
| 1" | Fully Threaded | __ | Coarse | 7/16" | 7/16" | 21/32" | 170,000 | IFI 115 | 5 | 000000000 | 000000 |
| 1 1/4" | Fully Threaded | __ | Coarse | 7/16" | 7/16" | 21/32" | 170,000 | IFI 115 | 10 | 000000000 | 00000 |
| 1 1/2" | Fully Threaded | __ | Coarse | 7/16" | 7/16" | 21/32" | 170,000 | IFI 115 | 10 | 000000000 | 00000 |
| 2" | Partially Threaded | 1 3/8" | Coarse | 7/16" | 7/16" | 21/32" | 170,000 | IFI 115 | 10 | 000000000 | 00000 |
| 2 1/4" | Partially Threaded | 1 3/8" | Coarse | 7/16" | 7/16" | 21/32" | 170,000 | IFI 115 | 10 | 000000000 | 00000 |
| 2 1/2" | Partially Threaded | 1 3/8" | Coarse | 7/16" | 7/16" | 21/32" | 170,000 | IFI 115 | 10 | 000000000 | 00000 |
Black-Oxide Alloy Steel | |||||||||||
7/16"-14 | |||||||||||
| 3" | Partially Threaded | 1 1/4" | Coarse | 1/2" | 3/8" | 3/4" | 170,000 | __ | 1 | 000000000 | 0000 |
| 3 1/2" | Partially Threaded | 1 1/4" | Coarse | 1/2" | 3/8" | 3/4" | 170,000 | __ | 1 | 000000000 | 0000 |
| 4" | Partially Threaded | 1 1/4" | Coarse | 1/2" | 3/8" | 3/4" | 170,000 | __ | 1 | 000000000 | 0000 |
| 4 1/2" | Partially Threaded | 1 1/4" | Coarse | 1/2" | 3/8" | 3/4" | 170,000 | __ | 1 | 000000000 | 0000 |
| 5" | Partially Threaded | 1 1/4" | Coarse | 1/2" | 3/8" | 3/4" | 170,000 | __ | 1 | 000000000 | 0000 |
7/16"-20 | |||||||||||
| 1" | Fully Threaded | __ | Fine | 1/2" | 3/8" | 3/4" | 170,000 | __ | 1 | 000000000 | 0000 |
| 1 1/4" | Fully Threaded | __ | Fine | 1/2" | 3/8" | 3/4" | 170,000 | __ | 1 | 000000000 | 0000 |
| 1 1/2" | Partially Threaded | 1 1/4" | Fine | 1/2" | 3/8" | 3/4" | 170,000 | __ | 1 | 000000000 | 0000 |
| 1 3/4" | Partially Threaded | 1 1/4" | Fine | 1/2" | 3/8" | 3/4" | 170,000 | __ | 1 | 000000000 | 0000 |
| 2" | Partially Threaded | 1 1/4" | Fine | 1/2" | 3/8" | 3/4" | 170,000 | __ | 1 | 000000000 | 0000 |
| 2 1/4" | Partially Threaded | 1 1/4" | Fine | 1/2" | 3/8" | 3/4" | 170,000 | __ | 1 | 000000000 | 0000 |
| 2 1/2" | Partially Threaded | 1 1/4" | Fine | 1/2" | 3/8" | 3/4" | 170,000 | __ | 1 | 000000000 | 0000 |
| 3" | Partially Threaded | 1 1/4" | Fine | 1/2" | 3/8" | 3/4" | 170,000 | __ | 1 | 000000000 | 0000 |