About Flat Head Screws
More
About Rounded Head Screws
More
About Set Screws
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.
Screws that meet ASTM A574, ASTM A574M, and ISO 898-1 comply with specifications and testing requirements for material quality.
Head | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Threading | Min. Thread Lg. | Thread Spacing  | Dia. | Ht. | Drive Size | Tensile Strength, psi | Specifications Met | Pkg. Qty. | Pkg. | |
3-56 | |||||||||||
Black-Oxide Alloy Steel | |||||||||||
| 1/8" | Fully Threaded | __ | Fine | 0.161" | 0.099" | 5/64" | 170,000 | ASTM A574 | 10 | 000000000 | 000000 |
| 3/16" | Fully Threaded | __ | Fine | 0.161" | 0.099" | 5/64" | 170,000 | ASTM A574 | 5 | 000000000 | 0000 |
| 1/4" | Fully Threaded | __ | Fine | 0.161" | 0.099" | 5/64" | 170,000 | ASTM A574 | 5 | 000000000 | 0000 |
| 5/16" | Fully Threaded | __ | Fine | 0.161" | 0.099" | 5/64" | 170,000 | ASTM A574 | 5 | 000000000 | 0000 |
| 3/8" | Fully Threaded | __ | Fine | 0.161" | 0.099" | 5/64" | 170,000 | ASTM A574 | 5 | 000000000 | 0000 |
| 1/2" | Fully Threaded | __ | Fine | 0.161" | 0.099" | 5/64" | 170,000 | ASTM A574 | 5 | 000000000 | 0000 |
| 3/4" | Fully Threaded | __ | Fine | 0.161" | 0.099" | 5/64" | 170,000 | ASTM A574 | 5 | 000000000 | 0000 |
| 1" | Partially Threaded | 5/8" | Fine | 0.161" | 0.099" | 5/64" | 170,000 | ASTM A574 | 5 | 000000000 | 00000 |
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.
Fine threads are closely spaced to prevent loosening from vibration. They are not compatible with coarse threads.
Screws that meet ASME B1.1, ASME B18.3, ISO 21269, and ISO 4762 (formerly DIN 912) comply with standards for dimensions.
Head | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Threading | Min. Thread Lg. | Thread Spacing | Dia. | Ht. | Drive Size | Tensile Strength, psi | Specifications Met | Pkg. Qty. | Pkg. | |
3-56 | |||||||||||
18-8 Stainless Steel | |||||||||||
| 1/8" | Fully Threaded | __ | Fine | 0.161" | 0.099" | 5/64" | 70,000 | ASME B18.3 | 100 | 000000000 | 00000 |
| 3/16" | Fully Threaded | __ | Fine | 0.161" | 0.099" | 5/64" | 70,000 | ASME B18.3 | 100 | 000000000 | 0000 |
| 1/4" | Fully Threaded | __ | Fine | 0.161" | 0.099" | 5/64" | 70,000 | ASME B18.3 | 25 | 000000000 | 0000 |
| 5/16" | Fully Threaded | __ | Fine | 0.161" | 0.099" | 5/64" | 70,000 | ASME B18.3 | 50 | 000000000 | 00000 |
| 3/8" | Fully Threaded | __ | Fine | 0.161" | 0.099" | 5/64" | 70,000 | ASME B18.3 | 25 | 000000000 | 0000 |
| 1/2" | Fully Threaded | __ | Fine | 0.161" | 0.099" | 5/64" | 70,000 | ASME B18.3 | 50 | 000000000 | 00000 |
| 5/8" | Fully Threaded | __ | Fine | 0.161" | 0.099" | 5/64" | 70,000 | ASME B18.3 | 50 | 000000000 | 00000 |
| 3/4" | Fully Threaded | __ | Fine | 0.161" | 0.099" | 5/64" | 70,000 | ASME B18.3 | 50 | 000000000 | 00000 |
| 1" | Partially Threaded | 5/8" | Fine | 0.161" | 0.099" | 5/64" | 70,000 | ASME B18.3 | 100 | 000000000 | 0000 |
18-8 Stainless Steel Button Head Hex Drive Screws
18-8 stainless steel button head screws have good chemical resistance and may be mildly magnetic. Length is measured from under the head.
Passivated stainless steel screws provide added protection against oxidation and corrosion.
| Lg. | Threading | Head Dia. | Head Ht. | Drive Size | Finish | Tensile Strength, psi | Specifications Met | Pkg. Qty. | Pkg. | |
3-56 | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1/4" | Fully Threaded | 0.188" | 0.052" | 1/16" | Passivated | 70,000 | ASME B18.3 | 25 | 000000000 | 00000 |
| 3/8" | Fully Threaded | 0.188" | 0.052" | 1/16" | Passivated | 70,000 | ASME B18.3 | 25 | 000000000 | 0000 |
| 1/2" | Fully Threaded | 0.188" | 0.052" | 1/16" | Passivated | 70,000 | ASME B18.3 | 10 | 000000000 | 0000 |
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.
| Lg. | Threading | Head Dia. | Head Ht. | Drive Size | Tensile Strength, psi | Specifications Met | Pkg. Qty. | Pkg. | |
Black-Oxide Alloy Steel | |||||||||
|---|---|---|---|---|---|---|---|---|---|
3-56 | |||||||||
| 1/4" | Fully Threaded | 0.188" | 0.052" | 1/16" | 120,000 | ASME B18.3;ASTM F835 | 10 | 000000000 | 00000 |
| 3/8" | Fully Threaded | 0.188" | 0.052" | 1/16" | 120,000 | ASME B18.3;ASTM F835 | 10 | 000000000 | 00000 |
| 1/2" | Fully Threaded | 0.188" | 0.052" | 1/16" | 120,000 | ASME B18.3;ASTM F835 | 10 | 000000000 | 00000 |
Brass Button Head Hex Drive Screws
Brass button head screws are corrosion resistant in wet environments, nonmagnetic, and electrically conductive. Length is measured from under the head.
18-8 Stainless Steel Pan Head Phillips Screws
18-8 stainless steel pan head screws have good chemical resistance and may be mildly magnetic. Length is measured from under the head. For partially threaded screws thread length may vary from the minimum thread length published to fully threaded.
Passivated stainless steel screws provide added protection against oxidation and corrosion.
| Lg. | Threading | Head Dia. | Head Ht. | Drive Size | Tensile Strength, psi | Specifications Met | Pkg. Qty. | Pkg. | |
Passivated 18-8 Stainless Steel | |||||||||
|---|---|---|---|---|---|---|---|---|---|
3-56 | |||||||||
| 1/8" | Fully Threaded | 0.193" | 0.071" | No. 1 | 70,000 | ASME B18.6.3 | 100 | 000000000 | 000000 |
| 3/16" | Fully Threaded | 0.193" | 0.071" | No. 1 | 70,000 | ASME B18.6.3 | 100 | 000000000 | 0000 |
| 1/4" | Fully Threaded | 0.193" | 0.071" | No. 1 | 70,000 | ASME B18.6.3 | 100 | 000000000 | 0000 |
| 5/16" | Fully Threaded | 0.193" | 0.071" | No. 1 | 70,000 | ASME B18.6.3 | 100 | 000000000 | 0000 |
| 3/8" | Fully Threaded | 0.193" | 0.071" | No. 1 | 70,000 | ASME B18.6.3 | 100 | 000000000 | 0000 |
| 7/16" | Fully Threaded | 0.193" | 0.071" | No. 1 | 70,000 | ASME B18.6.3 | 100 | 000000000 | 0000 |
| 1/2" | Fully Threaded | 0.193" | 0.071" | No. 1 | 70,000 | ASME B18.6.3 | 100 | 000000000 | 0000 |
| 5/8" | Fully Threaded | 0.193" | 0.071" | No. 1 | 70,000 | ASME B18.6.3 | 100 | 000000000 | 0000 |
| 3/4" | Fully Threaded | 0.193" | 0.071" | No. 1 | 70,000 | ASME B18.6.3 | 50 | 000000000 | 0000 |
| 1" | Fully Threaded | 0.193" | 0.071" | No. 1 | 70,000 | ASME B18.6.3 | 50 | 000000000 | 0000 |
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.
| Lg. | Threading | Flat Head Profile | Head Dia. | Head Ht. | Drive Size | Tensile Strength, psi | Specifications Met | Pkg. Qty. | Pkg. | |
Black-Oxide Alloy Steel | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
3-56 | ||||||||||
| 1/4" | Fully Threaded | Standard | 0.226" | 0.073" | 1/16" | 130,000 | ASTM F835 | 10 | 000000000 | 00000 |
| 3/8" | Fully Threaded | Standard | 0.226" | 0.073" | 1/16" | 130,000 | ASTM F835 | 10 | 000000000 | 0000 |
| 1/2" | Fully Threaded | Standard | 0.226" | 0.073" | 1/16" | 130,000 | ASTM F835 | 10 | 000000000 | 00000 |
18-8 Stainless Steel Phillips Flat Head Screws
These screws have good chemical resistance and may be mildly magnetic. They’re angled under the head to sit flush within countersunk holes. Length is measured from the top of the head.
Passivated stainless steel screws provide added protection against oxidation and corrosion.
| Lg. | Threading | Flat Head Profile | Head Dia. | Head Ht. | Drive Size | Tensile Strength, psi | Specifications Met | Pkg. Qty. | Pkg. | |
Passivated 18-8 Stainless Steel—82° Countersink Angle | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
3-56 | ||||||||||
| 3/16" | Fully Threaded | Standard | 0.187" | 0.059" | No. 1 | 80,000 | ASME B18.6.3 | 100 | 000000000 | 00000 |
| 1/4" | Fully Threaded | Standard | 0.187" | 0.059" | No. 1 | 80,000 | ASME B18.6.3 | 100 | 000000000 | 0000 |
| 3/8" | Fully Threaded | Standard | 0.187" | 0.059" | No. 1 | 80,000 | ASME B18.6.3 | 100 | 000000000 | 0000 |
Alloy Steel Cup-Point Set Screws
Made from alloy steel, these set screws have a thin edge that digs into hard surfaces for a secure hold. Length listed is the overall length.
Black-oxide alloy steel set screws resist corrosion in dry environments.
| Lg. | Drive Size | Hardness | Specifications Met | Pkg. Qty. | Pkg. | |
Black-Oxide Alloy Steel | ||||||
|---|---|---|---|---|---|---|
3-56 | ||||||
| 3/32" | 0.050" | Rockwell C45 | ASME B18.3, ASTM F912 | 10 | 000000000 | 00000 |
| 1/8" | 0.050" | Rockwell C45 | ASME B18.3, ASTM F912 | 10 | 000000000 | 0000 |
| 3/16" | 0.050" | Rockwell C45 | ASME B18.3, ASTM F912 | 10 | 000000000 | 0000 |
| 1/4" | 0.050" | Rockwell C45 | ASME B18.3, ASTM F912 | 10 | 000000000 | 0000 |
| 3/8" | 0.050" | Rockwell C45 | ASME B18.3, ASTM F912 | 10 | 000000000 | 0000 |
18-8 Stainless Steel Cup-Point Set Screws
Made from 18-8 stainless steel, these set screws are chemical resistant and may be mildly magnetic. They have a thin edge that digs into the contact surface for a secure hold. Length listed is the overall length.
| Lg. | Drive Size | Hardness | Specifications Met | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | ||||||
|---|---|---|---|---|---|---|
3-56 | ||||||
| 1/16" | 0.050" | Rockwell B80 | ASME B18.3 | 10 | 000000000 | 00000 |
| 3/32" | 0.050" | Rockwell B80 | ASME B18.3 | 10 | 000000000 | 0000 |
| 1/8" | 0.050" | Rockwell B80 | ASME B18.3 | 10 | 000000000 | 0000 |
| 3/16" | 0.050" | Rockwell B80 | ASME B18.3 | 10 | 000000000 | 0000 |
| 1/4" | 0.050" | Rockwell B80 | ASME B18.3 | 10 | 000000000 | 0000 |
| 5/16" | 0.050" | Rockwell B80 | ASME B18.3 | 10 | 000000000 | 0000 |
| 3/8" | 0.050" | Rockwell B80 | ASME B18.3 | 10 | 000000000 | 0000 |
18-8 Stainless Steel Extended-Tip Set Screws
Made from 18-8 stainless steel, these set screws are chemical resistant and may be mildly magnetic. They have a protruding tip that locks within a mating hole or slot to keep parts aligned. They're also known as half dog-point set screws. Length listed is the overall length.
Tip | ||||||||
|---|---|---|---|---|---|---|---|---|
| Lg. | Dia. | Lg. | Drive Size | Hardness | Specifications Met | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | ||||||||
3-56 | ||||||||
| 1/8" | 0.066" | 0.027" | 0.050" | Rockwell B80 | ASME B18.3 | 25 | 000000000 | 000000 |