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Stainless Steel Tamper-Resistant Button Head Hex Drive Screws
These 18-8 stainless steel button head screws have good chemical resistance and may be mildly magnetic. They’re passivated for added protection against oxidation and corrosion. The tamper-resistant hex drive (also known as a pin-in hex drive) makes them difficult to remove without special tools. For installation tools, see tamper-resistant hex drivers and bits. 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  | Specifications Met | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | |||||||||
|---|---|---|---|---|---|---|---|---|---|
4-40 | |||||||||
| 3/16" | Fully Threaded | 0.213" | 0.059" | 3/32" | 70,000 | ASME B18.3 | 50 | 000000000 | 000000 |
| 1/4" | Fully Threaded | 0.213" | 0.059" | 3/32" | 70,000 | ASME B18.3 | 50 | 000000000 | 00000 |
| 3/8" | Fully Threaded | 0.213" | 0.059" | 3/32" | 70,000 | ASME B18.3 | 25 | 000000000 | 0000 |
| 1/2" | Fully Threaded | 0.213" | 0.059" | 3/32" | 70,000 | ASME B18.3 | 25 | 000000000 | 0000 |
| 3/4" | Fully Threaded | 0.213" | 0.059" | 3/32" | 70,000 | ASME B18.3 | 25 | 000000000 | 00000 |
6-32 | |||||||||
| 1/4" | Fully Threaded | 0.262" | 0.073" | 1/8" | 70,000 | ASME B18.3 | 25 | 000000000 | 0000 |
| 3/8" | Fully Threaded | 0.262" | 0.073" | 1/8" | 70,000 | ASME B18.3 | 25 | 000000000 | 00000 |
| 1/2" | Fully Threaded | 0.262" | 0.073" | 1/8" | 70,000 | ASME B18.3 | 25 | 000000000 | 00000 |
| 3/4" | Fully Threaded | 0.262" | 0.073" | 1/8" | 70,000 | ASME B18.3 | 25 | 000000000 | 00000 |
| 1" | Fully Threaded | 0.262" | 0.073" | 1/8" | 70,000 | ASME B18.3 | 25 | 000000000 | 00000 |
8-32 | |||||||||
| 1/4" | Fully Threaded | 0.312" | 0.087" | 5/32" | 70,000 | ASME B18.3 | 25 | 000000000 | 00000 |
| 3/8" | Fully Threaded | 0.312" | 0.087" | 5/32" | 70,000 | ASME B18.3 | 25 | 000000000 | 00000 |
| 1/2" | Fully Threaded | 0.312" | 0.087" | 5/32" | 70,000 | ASME B18.3 | 25 | 000000000 | 00000 |
| 3/4" | Fully Threaded | 0.312" | 0.087" | 5/32" | 70,000 | ASME B18.3 | 25 | 000000000 | 00000 |
| 1" | Fully Threaded | 0.312" | 0.087" | 5/32" | 70,000 | ASME B18.3 | 25 | 000000000 | 00000 |
| 1 1/2" | Fully Threaded | 0.312" | 0.087" | 5/32" | 70,000 | ASME B18.3 | 25 | 000000000 | 00000 |
10-24 | |||||||||
| 3/8" | Fully Threaded | 0.361" | 0.101" | 5/32" | 70,000 | ASME B18.3 | 25 | 000000000 | 00000 |
| 1/2" | Fully Threaded | 0.361" | 0.101" | 5/32" | 70,000 | ASME B18.3 | 25 | 000000000 | 00000 |
| 3/4" | Fully Threaded | 0.361" | 0.101" | 5/32" | 70,000 | ASME B18.3 | 25 | 000000000 | 00000 |
| 1" | Fully Threaded | 0.361" | 0.101" | 5/32" | 70,000 | ASME B18.3 | 25 | 000000000 | 00000 |
| 1 1/2" | Fully Threaded | 0.361" | 0.101" | 5/32" | 70,000 | ASME B18.3 | 10 | 000000000 | 0000 |
10-32 | |||||||||
| 1/4" | Fully Threaded | 0.361" | 0.101" | 5/32" | 70,000 | ASME B18.3 | 25 | 000000000 | 0000 |
| 3/8" | Fully Threaded | 0.361" | 0.101" | 5/32" | 70,000 | __ | 25 | 000000000 | 0000 |
| 1/2" | Fully Threaded | 0.361" | 0.101" | 5/32" | 70,000 | ASME B18.3 | 25 | 000000000 | 00000 |
| 3/4" | Fully Threaded | 0.361" | 0.101" | 5/32" | 70,000 | ASME B18.3 | 25 | 000000000 | 00000 |
| 1" | Fully Threaded | 0.361" | 0.101" | 5/32" | 70,000 | ASME B18.3 | 25 | 000000000 | 00000 |
| 1 1/2" | Fully Threaded | 0.361" | 0.101" | 5/32" | 70,000 | ASME B18.3 | 10 | 000000000 | 0000 |
1/4"-20 | |||||||||
| 1/4" | Fully Threaded | 0.437" | 0.132" | 5/32" | 70,000 | ASME B18.3 | 10 | 000000000 | 0000 |
| 3/8" | Fully Threaded | 0.437" | 0.132" | 5/32" | 70,000 | ASME B18.3 | 10 | 000000000 | 0000 |
| 1/2" | Fully Threaded | 0.437" | 0.132" | 5/32" | 70,000 | ASME B18.3 | 25 | 000000000 | 00000 |
| 5/8" | Fully Threaded | 0.437" | 0.132" | 5/32" | 70,000 | ASME B18.3 | 10 | 000000000 | 0000 |
| 3/4" | Fully Threaded | 0.437" | 0.132" | 5/32" | 70,000 | ASME B18.3 | 10 | 000000000 | 0000 |
| 1" | Fully Threaded | 0.437" | 0.132" | 5/32" | 70,000 | ASME B18.3 | 10 | 000000000 | 0000 |
| 1 1/4" | Fully Threaded | 0.437" | 0.132" | 5/32" | 70,000 | ASME B18.3 | 10 | 000000000 | 0000 |
| 1 1/2" | Fully Threaded | 0.437" | 0.132" | 5/32" | 70,000 | ASME B18.3 | 10 | 000000000 | 0000 |
| 2" | Fully Threaded | 0.437" | 0.132" | 5/32" | 70,000 | ASME B18.3 | 10 | 000000000 | 0000 |
| 3" | Fully Threaded | 0.437" | 0.132" | 5/32" | 70,000 | ASME B18.3 | 5 | 000000000 | 00000 |
1/4"-28 | |||||||||
| 1/2" | Fully Threaded | 0.437" | 0.132" | 5/32" | 70,000 | ASME B18.3 | 10 | 000000000 | 0000 |
| 3/4" | Fully Threaded | 0.437" | 0.132" | 5/32" | 70,000 | ASME B18.3 | 10 | 000000000 | 00000 |
| 1" | Fully Threaded | 0.437" | 0.132" | 5/32" | 70,000 | ASME B18.3 | 10 | 000000000 | 00000 |
5/16"-18 | |||||||||
| 1/2" | Fully Threaded | 0.547" | 0.166" | 3/16" | 70,000 | ASME B18.3 | 10 | 000000000 | 00000 |
| 3/4" | Fully Threaded | 0.547" | 0.166" | 3/16" | 70,000 | ASME B18.3 | 10 | 000000000 | 00000 |
| 1" | Fully Threaded | 0.547" | 0.166" | 3/16" | 70,000 | ASME B18.3 | 10 | 000000000 | 00000 |
| 1 1/4" | Fully Threaded | 0.547" | 0.166" | 3/16" | 70,000 | ASME B18.3 | 5 | 000000000 | 0000 |
| 1 1/2" | Fully Threaded | 0.547" | 0.166" | 3/16" | 70,000 | ASME B18.3 | 5 | 000000000 | 0000 |
| 2" | Fully Threaded | 0.547" | 0.166" | 3/16" | 70,000 | ASME B18.3 | 5 | 000000000 | 0000 |
3/8"-16 | |||||||||
| 1/2" | Fully Threaded | 0.656" | 0.199" | 7/32" | 70,000 | ASME B18.3 | 10 | 000000000 | 00000 |
| 3/4" | Fully Threaded | 0.656" | 0.199" | 7/32" | 70,000 | ASME B18.3 | 5 | 000000000 | 0000 |
| 1" | Fully Threaded | 0.656" | 0.199" | 7/32" | 70,000 | ASME B18.3 | 5 | 000000000 | 0000 |
| 1 1/4" | Fully Threaded | 0.656" | 0.199" | 7/32" | 70,000 | ASME B18.3 | 5 | 000000000 | 0000 |
| 1 1/2" | Fully Threaded | 0.656" | 0.199" | 7/32" | 70,000 | ASME B18.3 | 5 | 000000000 | 00000 |
| 2" | Fully Threaded | 0.656" | 0.199" | 7/32" | 70,000 | ASME B18.3 | 5 | 000000000 | 00000 |
Metric Stainless Steel Tamper-Resistant Button Head Hex Drive Screws
Made from 18-8 stainless steel, these button head screws have good chemical resistance and may be mildly magnetic. They’re passivated for added protection against oxidation and corrosion. The tamper-resistant hex drive (also known as a pin-in hex drive) makes them difficult to remove without special tools. For installation tools, see tamper-resistant hex drivers and bits. 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 × 0.5 mm | |||||||||
| 6 | Fully Threaded | 6.20 | 1.65 | 3/32" | 80,000 | ASTM F879M | 50 | 000000000 | 000000 |
| 8 | Fully Threaded | 6.20 | 1.65 | 3/32" | 80,000 | ASTM F879M | 50 | 000000000 | 00000 |
| 10 | Fully Threaded | 5.69 | 1.65 | 3/32" | 80,000 | ASTM F879M | 50 | 000000000 | 00000 |
| 12 | Fully Threaded | 5.69 | 1.65 | 3/32" | 80,000 | ASTM F879M | 50 | 000000000 | 00000 |
M4 × 0.7 mm | |||||||||
| 6 | Fully Threaded | 7.59 | 2.18 | 5/32" | 80,000 | ASTM F879M | 50 | 000000000 | 00000 |
| 8 | Fully Threaded | 7.59 | 2.18 | 5/32" | 80,000 | ASTM F879M | 25 | 000000000 | 0000 |
| 10 | Fully Threaded | 7.59 | 2.18 | 5/32" | 80,000 | ASTM F879M | 25 | 000000000 | 0000 |
| 12 | Fully Threaded | 7.59 | 2.18 | 5/32" | 80,000 | ASTM F879M | 25 | 000000000 | 0000 |
| 16 | Fully Threaded | 7.59 | 2.18 | 5/32" | 80,000 | ASTM F879M | 25 | 000000000 | 0000 |
| 20 | Fully Threaded | 7.59 | 2.18 | 5/32" | 80,000 | ASTM F879M | 25 | 000000000 | 00000 |
M5 × 0.8 mm | |||||||||
| 8 | Fully Threaded | 9.50 | 2.74 | 5/32" | 80,000 | ASTM F879M | 25 | 000000000 | 00000 |
| 10 | Fully Threaded | 9.50 | 2.74 | 5/32" | 80,000 | ASTM F879M | 25 | 000000000 | 00000 |
| 12 | Fully Threaded | 9.50 | 2.74 | 5/32" | 80,000 | ASTM F879M | 25 | 000000000 | 00000 |
| 16 | Fully Threaded | 9.50 | 2.74 | 5/32" | 80,000 | ASTM F879M | 25 | 000000000 | 00000 |
| 20 | Fully Threaded | 9.50 | 2.74 | 5/32" | 80,000 | ASTM F879M | 25 | 000000000 | 00000 |
M6 × 1 mm | |||||||||
| 10 | Fully Threaded | 10.49 | 3.28 | 5/32" | 80,000 | ASTM F879M | 25 | 000000000 | 00000 |
| 12 | Fully Threaded | 10.49 | 3.28 | 5/32" | 80,000 | ASTM F879M | 25 | 000000000 | 00000 |
| 16 | Fully Threaded | 10.49 | 3.28 | 5/32" | 80,000 | ASTM F879M | 10 | 000000000 | 0000 |
| 20 | Fully Threaded | 10.49 | 3.28 | 5/32" | 80,000 | ASTM F879M | 10 | 000000000 | 0000 |
| 25 | Fully Threaded | 10.49 | 3.28 | 5/32" | 80,000 | ASTM F879M | 10 | 000000000 | 0000 |
| 30 | Fully Threaded | 10.49 | 3.28 | 5/32" | 80,000 | ASTM F879M | 10 | 000000000 | 0000 |
M8 × 1.25 mm | |||||||||
| 12 | Fully Threaded | 14.00 | 4.39 | 3/16" | 80,000 | ASTM F879M | 10 | 000000000 | 00000 |
| 16 | Fully Threaded | 14.00 | 4.39 | 3/16" | 80,000 | ASTM F879M | 10 | 000000000 | 00000 |
| 20 | Fully Threaded | 14.00 | 4.39 | 3/16" | 80,000 | ASTM F879M | 10 | 000000000 | 00000 |
| 25 | Fully Threaded | 14.00 | 4.39 | 3/16" | 80,000 | ASTM F879M | 10 | 000000000 | 00000 |
| 30 | Fully Threaded | 14.00 | 4.39 | 3/16" | 80,000 | ASTM F879M | 10 | 000000000 | 00000 |
M10 × 1.5 mm | |||||||||
| 20 | Fully Threaded | 17.50 | 5.49 | 7/32" | 80,000 | ASTM F879M | 5 | 000000000 | 0000 |
| 25 | Fully Threaded | 17.50 | 5.49 | 7/32" | 80,000 | ASTM F879M | 5 | 000000000 | 00000 |
| 30 | Fully Threaded | 17.50 | 5.49 | 7/32" | 80,000 | ASTM F879M | 5 | 000000000 | 00000 |
Alloy Steel Tamper-Resistant Button Head Hex Drive Screws
Made from alloy steel, these screws are nearly twice as strong as stainless steel button head screws. They have a black-oxide finish that provides mild corrosion resistance in dry environments. Their tamper-resistant hex drive (also known as a pin-in hex drive) makes them difficult to remove without special tools. For installation tools, see tamper-resistant hex drivers and bits. 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 | Specifications Met | Pkg. Qty. | Pkg. | |
Black-Oxide Alloy Steel | |||||||||
|---|---|---|---|---|---|---|---|---|---|
4-40 | |||||||||
| 3/16" | Fully Threaded | 0.213" | 0.059" | 3/32" | 130,000 | ASME B18.3, ASTM F835 | 50 | 000000000 | 000000 |
| 1/4" | Fully Threaded | 0.213" | 0.059" | 3/32" | 130,000 | ASME B18.3, ASTM F835 | 50 | 000000000 | 00000 |
| 3/8" | Fully Threaded | 0.213" | 0.059" | 3/32" | 130,000 | ASME B18.3, ASTM F835 | 50 | 000000000 | 00000 |
| 1/2" | Fully Threaded | 0.213" | 0.059" | 3/32" | 130,000 | ASME B18.3, ASTM F835 | 50 | 000000000 | 00000 |
| 3/4" | Fully Threaded | 0.213" | 0.059" | 3/32" | 130,000 | ASME B18.3, ASTM F835 | 50 | 000000000 | 00000 |
6-32 | |||||||||
| 1/4" | Fully Threaded | 0.262" | 0.073" | 1/8" | 130,000 | ASME B18.3, ASTM F835 | 50 | 000000000 | 00000 |
| 3/8" | Fully Threaded | 0.262" | 0.073" | 1/8" | 130,000 | ASME B18.3, ASTM F835 | 50 | 000000000 | 00000 |
| 1/2" | Fully Threaded | 0.262" | 0.073" | 1/8" | 130,000 | ASME B18.3, ASTM F835 | 50 | 000000000 | 00000 |
| 3/4" | Fully Threaded | 0.262" | 0.073" | 1/8" | 130,000 | ASME B18.3, ASTM F835 | 50 | 000000000 | 00000 |
| 1" | Fully Threaded | 0.262" | 0.073" | 1/8" | 130,000 | ASME B18.3, ASTM F835 | 50 | 000000000 | 00000 |
8-32 | |||||||||
| 1/4" | Fully Threaded | 0.312" | 0.087" | 5/32" | 130,000 | ASME B18.3, ASTM F835 | 50 | 000000000 | 00000 |
| 3/8" | Fully Threaded | 0.312" | 0.087" | 5/32" | 130,000 | ASME B18.3, ASTM F835 | 50 | 000000000 | 00000 |
| 1/2" | Fully Threaded | 0.312" | 0.087" | 5/32" | 130,000 | ASME B18.3, ASTM F835 | 25 | 000000000 | 00000 |
| 3/4" | Fully Threaded | 0.312" | 0.087" | 5/32" | 130,000 | ASME B18.3, ASTM F835 | 25 | 000000000 | 00000 |
| 1" | Fully Threaded | 0.312" | 0.087" | 5/32" | 130,000 | ASME B18.3, ASTM F835 | 25 | 000000000 | 00000 |
10-24 | |||||||||
| 3/8" | Fully Threaded | 0.361" | 0.101" | 5/32" | 130,000 | ASME B18.3, ASTM F835 | 25 | 000000000 | 00000 |
| 1/2" | Fully Threaded | 0.361" | 0.101" | 5/32" | 130,000 | ASME B18.3, ASTM F835 | 25 | 000000000 | 0000 |
| 5/8" | Fully Threaded | 0.361" | 0.101" | 5/32" | 130,000 | ASME B18.3, ASTM F835 | 25 | 000000000 | 0000 |
| 3/4" | Fully Threaded | 0.361" | 0.101" | 5/32" | 130,000 | ASME B18.3, ASTM F835 | 25 | 000000000 | 0000 |
| 1" | Fully Threaded | 0.361" | 0.101" | 5/32" | 130,000 | ASME B18.3, ASTM F835 | 25 | 000000000 | 0000 |
10-32 | |||||||||
| 1/4" | Fully Threaded | 0.361" | 0.101" | 5/32" | 130,000 | ASME B18.3, ASTM F835 | 50 | 000000000 | 00000 |
| 3/8" | Fully Threaded | 0.361" | 0.101" | 5/32" | 130,000 | ASME B18.3, ASTM F835 | 50 | 000000000 | 00000 |
| 1/2" | Fully Threaded | 0.361" | 0.101" | 5/32" | 130,000 | ASME B18.3, ASTM F835 | 25 | 000000000 | 0000 |
| 3/4" | Fully Threaded | 0.361" | 0.101" | 5/32" | 130,000 | ASME B18.3, ASTM F835 | 25 | 000000000 | 0000 |
| 1" | Fully Threaded | 0.361" | 0.101" | 5/32" | 130,000 | ASME B18.3, ASTM F835 | 25 | 000000000 | 00000 |
12-24 | |||||||||
| 1/2" | Fully Threaded | 0.413" | 0.114" | 5/32" | 130,000 | ASME B18.3, ASTM F835 | 25 | 000000000 | 0000 |
1/4"-20 | |||||||||
| 3/8" | Fully Threaded | 0.437" | 0.132" | 5/32" | 130,000 | ASME B18.3, ASTM F835 | 25 | 000000000 | 00000 |
| 1/2" | Fully Threaded | 0.437" | 0.132" | 5/32" | 130,000 | ASME B18.3, ASTM F835 | 25 | 000000000 | 00000 |
| 5/8" | Fully Threaded | 0.437" | 0.132" | 5/32" | 130,000 | ASME B18.3, ASTM F835 | 25 | 000000000 | 00000 |
| 3/4" | Fully Threaded | 0.437" | 0.132" | 5/32" | 130,000 | ASME B18.3, ASTM F835 | 25 | 000000000 | 00000 |
| 1" | Fully Threaded | 0.437" | 0.132" | 5/32" | 130,000 | ASME B18.3, ASTM F835 | 25 | 000000000 | 00000 |
| 1 1/2" | Fully Threaded | 0.437" | 0.132" | 5/32" | 130,000 | ASME B18.3, ASTM F835 | 25 | 000000000 | 00000 |
5/16"-18 | |||||||||
| 3/4" | Fully Threaded | 0.547" | 0.166" | 3/16" | 130,000 | ASME B18.3, ASTM F835 | 10 | 000000000 | 0000 |
| 1" | Fully Threaded | 0.547" | 0.166" | 3/16" | 130,000 | ASME B18.3, ASTM F835 | 10 | 000000000 | 00000 |
3/8"-16 | |||||||||
| 3/4" | Fully Threaded | 0.656" | 0.199" | 7/32" | 130,000 | ASME B18.3, ASTM F835 | 10 | 000000000 | 00000 |
| 1" | Fully Threaded | 0.656" | 0.199" | 7/32" | 130,000 | ASME B18.3, ASTM F835 | 10 | 000000000 | 00000 |
Tamper-Resistant Hex Drive Flat Head Screws
Standard Profile
Undercut Profile
A tamper-resistant hex drive (also known as a pin-in hex drive) makes these screws difficult to remove without special tools. For installation tools, see tamper-resistant hex 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.
Screws with an undercut profile have a shallow head for use in thin materials.
For technical drawings and 3-D models, click on a part number.
| Lg. | Threading | Min. Thread Lg. | Flat Head Profile | Head Dia. | Head Ht. | Drive Size | Tensile Strength, psi | Specifications Met | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
4-40 | |||||||||||
| 1/4" | Fully Threaded | __ | Standard | 0.255" | 0.083" | 3/32" | 70,000 | ASME B18.3 | 25 | 000000000 | 000000 |
| 3/8" | Fully Threaded | __ | Standard | 0.255" | 0.083" | 3/32" | 70,000 | ASME B18.3 | 25 | 000000000 | 0000 |
| 1/2" | Fully Threaded | __ | Standard | 0.255" | 0.083" | 3/32" | 70,000 | ASME B18.3 | 25 | 000000000 | 0000 |
6-32 | |||||||||||
| 1/4" | Fully Threaded | __ | Undercut | 0.307" | 0.059" | 1/8" | 70,000 | ASME B18.3 | 25 | 000000000 | 0000 |
| 3/8" | Fully Threaded | __ | Standard | 0.307" | 0.097" | 1/8" | 70,000 | ASME B18.3 | 25 | 000000000 | 0000 |
| 1/2" | Fully Threaded | __ | Standard | 0.307" | 0.097" | 1/8" | 70,000 | ASME B18.3 | 25 | 000000000 | 0000 |
| 3/4" | Fully Threaded | __ | Standard | 0.307" | 0.097" | 1/8" | 70,000 | ASME B18.3 | 25 | 000000000 | 0000 |
8-32 | |||||||||||
| 3/8" | Fully Threaded | __ | Standard | 0.359" | 0.112" | 1/8" | 70,000 | ASME B18.3 | 25 | 000000000 | 0000 |
| 1/2" | Fully Threaded | __ | Standard | 0.359" | 0.112" | 1/8" | 70,000 | ASME B18.3 | 25 | 000000000 | 0000 |
| 3/4" | Fully Threaded | __ | Standard | 0.359" | 0.112" | 1/8" | 70,000 | ASME B18.3 | 25 | 000000000 | 00000 |
| 1" | Fully Threaded | __ | Standard | 0.359" | 0.112" | 1/8" | 70,000 | ASME B18.3 | 25 | 000000000 | 00000 |
10-24 | |||||||||||
| 3/8" | Fully Threaded | __ | Standard | 0.411" | 0.127" | 5/32" | 70,000 | ASME B18.3 | 25 | 000000000 | 00000 |
| 1/2" | Fully Threaded | __ | Standard | 0.411" | 0.127" | 5/32" | 70,000 | ASME B18.3 | 25 | 000000000 | 00000 |
| 3/4" | Fully Threaded | __ | Standard | 0.411" | 0.127" | 5/32" | 70,000 | ASME B18.3 | 25 | 000000000 | 00000 |
| 1" | Fully Threaded | __ | Standard | 0.411" | 0.127" | 5/32" | 70,000 | ASME B18.3 | 10 | 000000000 | 0000 |
10-32 | |||||||||||
| 3/8" | Fully Threaded | __ | Standard | 0.411" | 0.127" | 5/32" | 70,000 | ASME B18.3 | 25 | 000000000 | 00000 |
| 1/2" | Fully Threaded | __ | Standard | 0.411" | 0.127" | 5/32" | 70,000 | ASME B18.3 | 25 | 000000000 | 00000 |
| 3/4" | Fully Threaded | __ | Standard | 0.411" | 0.127" | 5/32" | 70,000 | ASME B18.3 | 25 | 000000000 | 00000 |
| 1" | Fully Threaded | __ | Standard | 0.411" | 0.127" | 5/32" | 70,000 | ASME B18.3 | 10 | 000000000 | 0000 |
| 1 1/2" | Fully Threaded | 7/8" | Standard | 0.411" | 0.127" | 5/32" | 70,000 | ASME B18.3 | 10 | 000000000 | 0000 |
1/4"-20 | |||||||||||
| 1/2" | Fully Threaded | __ | Standard | 0.531" | 0.161" | 5/32" | 70,000 | ASME B18.3 | 10 | 000000000 | 0000 |
| 5/8" | Fully Threaded | __ | Standard | 0.531" | 0.161" | 5/32" | 70,000 | ASME B18.3 | 10 | 000000000 | 0000 |
| 3/4" | Fully Threaded | __ | Standard | 0.531" | 0.161" | 5/32" | 70,000 | ASME B18.3 | 10 | 000000000 | 0000 |
| 1" | Fully Threaded | __ | Standard | 0.531" | 0.161" | 5/32" | 70,000 | ASME B18.3 | 10 | 000000000 | 0000 |
| 1 1/4" | Fully Threaded | 1" | Standard | 0.531" | 0.161" | 5/32" | 70,000 | ASME B18.3 | 10 | 000000000 | 00000 |
| 1 1/2" | Fully Threaded | 1" | Standard | 0.531" | 0.161" | 5/32" | 70,000 | ASME B18.3 | 10 | 000000000 | 00000 |
Metric Tamper-Resistant Hex Drive Flat Head Screws
A tamper-resistant hex drive (also known as a pin-in hex drive) makes these screws difficult to remove without special tools. For installation tools, see tamper-resistant hex 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 × 0.5 mm | |||||||||
| 6 | Fully Threaded | 6.71 | 1.85 | 3/32" | 80,000 | ASTM F879M | 50 | 000000000 | 000000 |
| 8 | Fully Threaded | 6.71 | 1.85 | 3/32" | 80,000 | ASTM F879M | 50 | 000000000 | 00000 |
| 10 | Fully Threaded | 6.71 | 1.85 | 3/32" | 80,000 | ASTM F879M | 50 | 000000000 | 00000 |
| 12 | Fully Threaded | 6.71 | 1.85 | 3/32" | 80,000 | ASTM F879M | 50 | 000000000 | 00000 |
M4 × 0.7 mm | |||||||||
| 6 | Fully Threaded | 8.94 | 2.48 | 5/32" | 80,000 | ASTM F879M | 25 | 000000000 | 00000 |
| 8 | Fully Threaded | 8.94 | 2.48 | 5/32" | 80,000 | ASTM F879M | 25 | 000000000 | 00000 |
| 10 | Fully Threaded | 8.94 | 2.48 | 5/32" | 80,000 | ASTM F879M | 25 | 000000000 | 00000 |
| 12 | Fully Threaded | 8.94 | 2.48 | 5/32" | 80,000 | ASTM F879M | 25 | 000000000 | 00000 |
| 16 | Fully Threaded | 8.94 | 2.48 | 5/32" | 80,000 | ASTM F879M | 25 | 000000000 | 00000 |
M5 × 0.8 mm | |||||||||
| 8 | Fully Threaded | 11.2 | 3.10 | 5/32" | 80,000 | ASTM F879M | 25 | 000000000 | 00000 |
| 10 | Fully Threaded | 11.2 | 3.10 | 5/32" | 80,000 | ASTM F879M | 25 | 000000000 | 00000 |
| 12 | Fully Threaded | 11.2 | 3.10 | 5/32" | 80,000 | ASTM F879M | 25 | 000000000 | 00000 |
| 16 | Fully Threaded | 11.2 | 3.10 | 5/32" | 80,000 | ASTM F879M | 25 | 000000000 | 00000 |
| 20 | Fully Threaded | 11.2 | 3.10 | 5/32" | 80,000 | ASTM F879M | 25 | 000000000 | 00000 |
M6 × 1 mm | |||||||||
| 12 | Fully Threaded | 13.44 | 3.72 | 5/32" | 80,000 | ASTM F879M | 10 | 000000000 | 0000 |
| 16 | Fully Threaded | 13.44 | 3.72 | 5/32" | 80,000 | ASTM F879M | 10 | 000000000 | 00000 |
| 20 | Fully Threaded | 13.44 | 3.72 | 5/32" | 80,000 | ASTM F879M | 10 | 000000000 | 00000 |
| 25 | Fully Threaded | 13.44 | 3.72 | 5/32" | 80,000 | ASTM F879M | 10 | 000000000 | 00000 |
| 30 | Fully Threaded | 13.44 | 3.72 | 5/32" | 80,000 | ASTM F879M | 10 | 000000000 | 00000 |
M8 × 1.25 mm | |||||||||
| 16 | Fully Threaded | 17.91 | 4.95 | 3/16" | 80,000 | ASTM F879M | 10 | 000000000 | 00000 |
| 20 | Fully Threaded | 17.91 | 4.95 | 3/16" | 80,000 | ASTM F879M | 10 | 000000000 | 00000 |
| 25 | Fully Threaded | 17.91 | 4.95 | 3/16" | 80,000 | ASTM F879M | 10 | 000000000 | 00000 |
| 30 | Fully Threaded | 17.91 | 4.95 | 3/16" | 80,000 | ASTM F879M | 10 | 000000000 | 00000 |
Tamper-Resistant Hex Drive Rounded Head Screws for Sheet Metal
Also known as pin-in-hex, install and remove these screws with a tamper-resistant hex driver. Made from 18-8 stainless steel, they are chemical resistant and may be mildly magnetic. They penetrate 0.025" and thinner sheet metal. Length is measured from under the head.
For technical drawings and 3-D models, click on a part number.
Head | ||||||||
|---|---|---|---|---|---|---|---|---|
| Lg. | Dia. | Ht. | Drive Size | Drill Bit Size | Approximate Threads per Inch | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | ||||||||
No. 6 | ||||||||
| 1/2" | 0.282" | 0.073" | 1/8" | No. 32 | 18 | 25 | 000000000 | 000000 |
| 3/4" | 0.282" | 0.073" | 1/8" | No. 32 | 18 | 25 | 000000000 | 00000 |
| 1" | 0.282" | 0.073" | 1/8" | No. 32 | 18 | 25 | 000000000 | 00000 |
No. 8 | ||||||||
| 1/2" | 0.312" | 0.087" | 5/32" | No. 29 | 15 | 25 | 000000000 | 00000 |
| 5/8" | 0.312" | 0.087" | 5/32" | No. 29 | 15 | 25 | 000000000 | 00000 |
| 3/4" | 0.312" | 0.087" | 5/32" | No. 29 | 15 | 25 | 000000000 | 0000 |
| 1" | 0.312" | 0.087" | 5/32" | No. 29 | 15 | 25 | 000000000 | 0000 |
| 1 1/4" | 0.312" | 0.087" | 5/32" | No. 29 | 15 | 25 | 000000000 | 00000 |
| 1 1/2" | 0.312" | 0.087" | 5/32" | No. 29 | 15 | 25 | 000000000 | 00000 |
No. 10 | ||||||||
| 1/2" | 0.361" | 0.101" | 5/32" | No. 21 | 12 | 25 | 000000000 | 0000 |
| 3/4" | 0.361" | 0.101" | 5/32" | No. 21 | 12 | 25 | 000000000 | 00000 |
| 1" | 0.361" | 0.101" | 5/32" | No. 21 | 12 | 25 | 000000000 | 00000 |
| 1 1/4" | 0.361" | 0.101" | 5/32" | No. 21 | 12 | 25 | 000000000 | 00000 |
| 1 1/2" | 0.361" | 0.101" | 5/32" | No. 21 | 12 | 25 | 000000000 | 00000 |
| 2" | 0.361" | 0.101" | 5/32" | No. 21 | 12 | 25 | 000000000 | 00000 |
No. 14 | ||||||||
| 3/4" | 0.437" | 0.132" | 5/32" | 5.5 mm | 10 | 25 | 000000000 | 00000 |
| 1" | 0.437" | 0.132" | 5/32" | 5.5 mm | 10 | 25 | 000000000 | 00000 |
| 1 1/2" | 0.437" | 0.132" | 5/32" | 5.5 mm | 10 | 10 | 000000000 | 0000 |
Tamper-Resistant Hex Drive Flat Head Screws for Sheet Metal
Also known as pin-in-hex, install and remove these screws with a tamper-resistant hex driver. They're beveled under the head for a flush finish in countersunk holes. Made from 18-8 stainless steel, they are chemical resistant and may be mildly magnetic. Screws penetrate 0.025" and thinner sheet metal. Length is measured from the top of the head.
For technical drawings and 3-D models, click on a part number.
Head | ||||||||
|---|---|---|---|---|---|---|---|---|
| Lg. | Dia. | Ht. | Drive Size | Drill Bit Size | Approximate Threads per Inch | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | ||||||||
No. 6 | ||||||||
| 1/2" | 0.307" | 0.097" | 1/8" | No. 32 | 18 | 25 | 000000000 | 000000 |
| 3/4" | 0.307" | 0.097" | 1/8" | No. 32 | 18 | 25 | 000000000 | 00000 |
| 1" | 0.307" | 0.097" | 1/8" | No. 32 | 18 | 25 | 000000000 | 00000 |
No. 8 | ||||||||
| 1/2" | 0.359" | 0.112" | 5/32" | No. 29 | 15 | 25 | 000000000 | 00000 |
| 3/4" | 0.359" | 0.112" | 5/32" | No. 29 | 15 | 25 | 000000000 | 00000 |
| 1" | 0.359" | 0.112" | 5/32" | No. 29 | 15 | 25 | 000000000 | 00000 |
No. 10 | ||||||||
| 1/2" | 0.411" | 0.127" | 5/32" | No. 21 | 12 | 25 | 000000000 | 00000 |
| 3/4" | 0.411" | 0.127" | 5/32" | No. 21 | 12 | 25 | 000000000 | 00000 |
| 1" | 0.411" | 0.127" | 5/32" | No. 21 | 12 | 25 | 000000000 | 00000 |
| 1 1/4" | 0.411" | 0.127" | 5/32" | No. 21 | 12 | 25 | 000000000 | 00000 |
| 1 1/2" | 0.411" | 0.127" | 5/32" | No. 21 | 12 | 25 | 000000000 | 00000 |
No. 14 | ||||||||
| 3/4" | 0.531" | 0.161" | 5/32" | 5.5 mm | 10 | 10 | 000000000 | 0000 |
| 1" | 0.531" | 0.161" | 5/32" | 5.5 mm | 10 | 10 | 000000000 | 0000 |
| 1 1/4" | 0.531" | 0.161" | 5/32" | 5.5 mm | 10 | 10 | 000000000 | 0000 |
| 1 1/2" | 0.531" | 0.161" | 5/32" | 5.5 mm | 10 | 10 | 000000000 | 0000 |