About Flat Head Screws
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About Rounded Head Screws
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About Socket 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 ASTM A574, ASTM A574M, and ISO 898-1 comply with specifications and testing requirements for material quality. 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 | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Lg., mm | Threading | Thread Spacing  | Dia., mm | Ht., mm | Drive Size, mm | Tensile Strength, psi | Specifications Met | Pkg. Qty. | Pkg. | |
M3.5 × 0.6 mm | ||||||||||
Black-Oxide Class 12.9 Alloy Steel | ||||||||||
| 6 | Fully Threaded | Coarse | 6 | 3.5 | 2.5 | 170,000 | ASME B18.3.1M, ASTM A574M | 5 | 000000000 | 000000 |
| 8 | Fully Threaded | Coarse | 6.2 | 3.5 | 2.5 | 170,000 | ASTM A574M, DIN 912, ISO 4762 | 10 | 000000000 | 00000 |
| 10 | Fully Threaded | Coarse | 6.2 | 3.5 | 2.5 | 170,000 | ASTM A574M, DIN 912, ISO 4762 | 10 | 000000000 | 00000 |
| 12 | Fully Threaded | Coarse | 6.2 | 3.5 | 2.5 | 170,000 | ASTM A574M, DIN 912, ISO 4762 | 10 | 000000000 | 00000 |
| 16 | Fully Threaded | Coarse | 6 | 3.5 | 2.5 | 170,000 | ASME B18.3.1M, ASTM A574M | 5 | 000000000 | 00000 |
| 20 | Fully Threaded | Coarse | 6.2 | 3.5 | 2.5 | 170,000 | ASTM A574M, DIN 912, ISO 4762 | 10 | 000000000 | 00000 |
| 25 | Fully Threaded | Coarse | 6.2 | 3.5 | 2.5 | 170,000 | ASTM A574M, DIN 912, ISO 4762 | 10 | 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.
Metric screws are also known as A2 stainless steel screws.
Coarse threads are the industry standard; choose these screws if you don’t know the pitch or threads per inch.
Screws that meet ASME B1.1, ASME B18.3, ISO 21269, and ISO 4762 (formerly DIN 912) comply with standards for dimensions.
For technical drawings and 3-D models, click on a part number.
Head | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Lg., mm | Threading | Thread Spacing | Dia., mm | Ht., mm | Drive Size, mm | Tensile Strength, psi | Specifications Met | Pkg. Qty. | Pkg. | |
M3.5 × 0.6 mm | ||||||||||
18-8 Stainless Steel | ||||||||||
| 6 | Fully Threaded | Coarse | 6.3 | 3.5 | 2.5 mm | 70,000 | ISO 4762 | 5 | 000000000 | 000000 |
| 8 | Fully Threaded | Coarse | 6.3 | 3.5 | 2.5 mm | 70,000 | ISO 4762 | 5 | 000000000 | 00000 |
| 10 | Fully Threaded | Coarse | 6.3 | 3.5 | 2.5 mm | 70,000 | ISO 4762 | 5 | 000000000 | 00000 |
| 12 | Fully Threaded | Coarse | 6.3 | 3.5 | 2.5 mm | 70,000 | ISO 4762 | 5 | 000000000 | 00000 |
| 14 | Fully Threaded | Coarse | 6.3 | 3.5 | 2.5 mm | 70,000 | ISO 4762 | 5 | 000000000 | 00000 |
| 16 | Fully Threaded | Coarse | 6.3 | 3.5 | 2.5 mm | 70,000 | ISO 4762 | 5 | 000000000 | 00000 |
| 20 | Fully Threaded | Coarse | 6.2 | 3.5 | 2.5 mm | 70,000 | DIN 912, ISO 4762 | 10 | 000000000 | 00000 |
| 25 | Fully Threaded | Coarse | 6.3 | 3.5 | 2.5 mm | 70,000 | ISO 4762 | 5 | 000000000 | 00000 |
Super-Corrosion-Resistant 316 Stainless Steel Socket Head Screws
More corrosion resistant than 18-8 stainless steel screws, these screws have excellent resistance to chemicals and salt water. They 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.
For technical drawings and 3-D models, click on a part number.
Head | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Threading | Thread Spacing | Dia. | Ht. | Drive Size | Finish | Tensile Strength, psi | Pkg. Qty. | Pkg. | |
316 Stainless Steel | ||||||||||
M3.5 × 0.6mm | ||||||||||
| 6mm | Fully Threaded | Coarse | 6.3mm | 3.5mm | 2.5 mm | Passivated | 70,000 | 5 | 000000000 | 000000 |
| 8mm | Fully Threaded | Coarse | 6.3mm | 3.5mm | 2.5 mm | Passivated | 70,000 | 5 | 000000000 | 00000 |
| 10mm | Fully Threaded | Coarse | 6.3mm | 3.5mm | 2.5 mm | Passivated | 70,000 | 5 | 000000000 | 00000 |
| 12mm | Fully Threaded | Coarse | 6.3mm | 3.5mm | 2.5 mm | Passivated | 70,000 | 5 | 000000000 | 00000 |
| 14mm | Fully Threaded | Coarse | 6.3mm | 3.5mm | 2.5 mm | Passivated | 70,000 | 5 | 000000000 | 00000 |
| 16mm | Fully Threaded | Coarse | 6.3mm | 3.5mm | 2.5 mm | Passivated | 70,000 | 5 | 000000000 | 00000 |
Alloy Steel Ultra-Low-Profile Socket Head Screws
Made from alloy steel, these screws are nearly twice as strong as stainless steel ultra-low-profile screws. Their black-oxide finish provides mild corrosion resistance in dry environments. To fit in the tightest spaces, they have a head that's about one-third the height of a standard socket head, but their low profile makes their head weaker. Not recommended for critical fastening applications. 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.
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 | |
Alloy Steel | ||||||||
M3.5 × 0.6 mm | ||||||||
| 6mm | Fully Threaded | Coarse | 6mm | 1mm | 2 mm | 140,000 | 000000000 | 00000 |
| 8mm | Fully Threaded | Coarse | 6mm | 1mm | 2 mm | 140,000 | 000000000 | 0000 |
| 10mm | Fully Threaded | Coarse | 6mm | 1mm | 2 mm | 140,000 | 000000000 | 0000 |
| 12mm | Fully Threaded | Coarse | 6mm | 1mm | 2 mm | 140,000 | 000000000 | 0000 |
| 14mm | Fully Threaded | Coarse | 6mm | 1mm | 2 mm | 140,000 | 000000000 | 0000 |
Metric 18-8 Stainless Steel Button Head Hex Drive Screws
Made from 18-8 stainless steel, these 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.
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. | |
Passivated 18-8 Stainless Steel | |||||||||
|---|---|---|---|---|---|---|---|---|---|
M3.5 × 0.6 mm | |||||||||
| 6 | Fully Threaded | 5.70 | 1.65 | 2 | 70,000 | ISO 7380 | 100 | 000000000 | 00000 |
| 8 | Fully Threaded | 5.70 | 1.65 | 2 | 70,000 | ISO 7380 | 100 | 000000000 | 0000 |
| 10 | Fully Threaded | 5.70 | 1.65 | 2 | 70,000 | ISO 7380 | 100 | 000000000 | 0000 |
| 14 | Fully Threaded | 5.70 | 1.65 | 2 | 70,000 | ISO 7380 | 100 | 000000000 | 0000 |
Metric 316 Stainless Steel Button Head Hex Drive Screws
316 stainless steel screws resist corrosion from chemicals and salt water better than 18-8 stainless steel screws. All are passivated for added protection against oxidation and corrosion. Screws may be mildly magnetic. Length is measured from under the head.
For technical drawings and 3-D models, click on a part number.
Metric 18-8 Stainless Steel Button Head Torx Screws
18-8 stainless steel screws have good chemical resistance and may be mildly magnetic. All are passivated for added protection against oxidation and corrosion. A Torx drive has more points of contact than other drives, allowing you to tighten the screw without damaging the recess. For Torx tools, see Torx bits, keys, and drivers. 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 | Tensile Strength, psi | Specifications Met | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | |||||||||
|---|---|---|---|---|---|---|---|---|---|
M3.5 × 0.6 mm | |||||||||
| 6 | Fully Threaded | 5.70 | 1.65 | T10 | 100,000 | ISO 7380 | 100 | 000000000 | 00000 |
| 8 | Fully Threaded | 5.70 | 1.65 | T10 | 100,000 | ISO 7380 | 100 | 000000000 | 0000 |
| 10 | Fully Threaded | 5.70 | 1.65 | T10 | 100,000 | ISO 7380 | 100 | 000000000 | 0000 |
Metric Stainless Steel Pan Head Torx Screws
Made from 18-8 stainless steel, these screws have good chemical resistance and may be mildly magnetic. Torx drives have more points of contact than other drives, allowing you to tighten the screw without damaging the recess. For Torx tools, see Torx bits, keys, and drivers. 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 | Tensile Strength, psi | Specifications Met | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | |||||||||
|---|---|---|---|---|---|---|---|---|---|
M3.5 × 0.6 mm | |||||||||
| 6 | Fully Threaded | 7 | 2.6 | T15 | 70,000 | ISO 14583 | 100 | 000000000 | 000000 |
| 8 | Fully Threaded | 7 | 2.6 | T15 | 70,000 | ISO 14583 | 100 | 000000000 | 00000 |
| 10 | Fully Threaded | 7 | 2.6 | T15 | 70,000 | ISO 14583 | 100 | 000000000 | 0000 |
| 12 | Fully Threaded | 7 | 2.6 | T15 | 70,000 | ISO 14583 | 100 | 000000000 | 00000 |
| 16 | Fully Threaded | 7 | 2.6 | T15 | 70,000 | ISO 14583 | 50 | 000000000 | 0000 |
| 20 | Fully Threaded | 7 | 2.6 | T15 | 70,000 | ISO 14583 | 50 | 000000000 | 0000 |
| 25 | Fully Threaded | 7 | 2.6 | T15 | 70,000 | ISO 14583 | 50 | 000000000 | 0000 |
| 30 | Fully Threaded | 7 | 2.6 | T15 | 70,000 | ISO 14583 | 50 | 000000000 | 00000 |
Metric 18-8 Stainless Steel Hex Drive Flat Head Screws
These 18-8 stainless steel screws 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 | Specifications Met | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | |||||||||
|---|---|---|---|---|---|---|---|---|---|
M3.5 × 0.6 mm | |||||||||
| 6 | Fully Threaded | 7 | 2 | 2 | 70,000 | DIN 7991, ISO 10642 | 1 | 000000000 | 00000 |
| 8 | Fully Threaded | 7 | 2 | 2 | 70,000 | DIN 7991, ISO 10642 | 1 | 000000000 | 0000 |
| 10 | Fully Threaded | 7 | 2 | 2 | 70,000 | DIN 7991, ISO 10642 | 1 | 000000000 | 0000 |
Metric Tamper-Resistant Torx Flat Head Screws
With a tamper-resistant Torx drive (also known as a pin-in Torx drive), these screws are difficult to remove without special tools. For installation tools, see tamper-resistant Torx drivers and bits. 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 | Tensile Strength, psi | Specifications Met | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | |||||||||
|---|---|---|---|---|---|---|---|---|---|
M3.5 × 0.6 mm | |||||||||
| 6 | Fully Threaded | 8.20 | 2.30 | T15 | 80,000 | ASTM F879M | 25 | 000000000 | 00000 |
| 8 | Fully Threaded | 8.20 | 2.30 | T15 | 80,000 | ASTM F879M | 25 | 000000000 | 0000 |
| 10 | Fully Threaded | 8.20 | 2.30 | T15 | 80,000 | ASTM F879M | 25 | 000000000 | 0000 |
| 12 | Fully Threaded | 8.20 | 2.30 | T15 | 80,000 | ASTM F879M | 25 | 000000000 | 0000 |
| 20 | Fully Threaded | 8.20 | 2.30 | T15 | 80,000 | ASTM F879M | 25 | 000000000 | 0000 |
| 25 | Fully Threaded | 8.20 | 2.30 | T15 | 80,000 | ASTM F879M | 25 | 000000000 | 0000 |
| 30 | Fully Threaded | 8.20 | 2.30 | T15 | 80,000 | ASTM F879M | 25 | 000000000 | 0000 |