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About Hex Head Screws and Bolts
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Aluminum Hex Head Screws
Aluminum screws are one-third the weight of steel and have good corrosion resistance. Length is measured from under the head.
Screws that meet ASME, ISO (formerly DIN), or DIN specifications comply with these dimensional standards.
Black-anodized screws provide additional corrosion-resistance and a finished look.
Head | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Lg. | Threading | Thread Spacing  | Wd. | Ht. | Tensile Strength, psi | Specifications Met | Pkg. Qty. | Pkg. | |
Black-Anodized Aluminum | |||||||||
1/4"-20 | |||||||||
| 1/2" | Fully Threaded | Coarse | 7/16" | 5/32" | 30,000 | ASME B18.2.1 | 1 | 000000000 | 00000 |
| 5/8" | Fully Threaded | Coarse | 7/16" | 5/32" | 30,000 | ASME B18.2.1 | 1 | 000000000 | 0000 |
| 3/4" | Fully Threaded | Coarse | 7/16" | 5/32" | 30,000 | ASME B18.2.1 | 1 | 000000000 | 0000 |
| 1" | Fully Threaded | Coarse | 7/16" | 5/32" | 30,000 | ASME B18.2.1 | 1 | 000000000 | 0000 |
| 1 1/4" | Fully Threaded | Coarse | 7/16" | 5/32" | 30,000 | ASME B18.2.1 | 1 | 000000000 | 0000 |
| 1 1/2" | Fully Threaded | Coarse | 7/16" | 5/32" | 30,000 | ASME B18.2.1 | 1 | 000000000 | 0000 |
| 2" | Fully Threaded | Coarse | 7/16" | 5/32" | 30,000 | ASME B18.2.1 | 1 | 000000000 | 0000 |
| 2 1/2" | Fully Threaded | Coarse | 7/16" | 5/32" | 30,000 | ASME B18.2.1 | 1 | 000000000 | 0000 |
5/16"-18 | |||||||||
| 3/4" | Fully Threaded | Coarse | 1/2" | 13/64" | 30,000 | ASME B18.2.1 | 1 | 000000000 | 0000 |
| 1" | Fully Threaded | Coarse | 1/2" | 13/64" | 30,000 | ASME B18.2.1 | 1 | 000000000 | 0000 |
| 1 1/4" | Fully Threaded | Coarse | 1/2" | 13/64" | 30,000 | ASME B18.2.1 | 1 | 000000000 | 0000 |
| 1 1/2" | Fully Threaded | Coarse | 1/2" | 13/64" | 30,000 | ASME B18.2.1 | 1 | 000000000 | 0000 |
| 2" | Fully Threaded | Coarse | 1/2" | 13/64" | 30,000 | ASME B18.2.1 | 1 | 000000000 | 0000 |
3/8"-16 | |||||||||
| 3/4" | Fully Threaded | Coarse | 9/16" | 15/64" | 30,000 | ASME B18.2.1 | 1 | 000000000 | 0000 |
| 1" | Fully Threaded | Coarse | 9/16" | 15/64" | 30,000 | ASME B18.2.1 | 1 | 000000000 | 0000 |
| 1 1/4" | Fully Threaded | Coarse | 9/16" | 15/64" | 30,000 | ASME B18.2.1 | 1 | 000000000 | 0000 |
| 1 1/2" | Fully Threaded | Coarse | 9/16" | 15/64" | 30,000 | ASME B18.2.1 | 1 | 000000000 | 0000 |
| 2" | Fully Threaded | Coarse | 9/16" | 15/64" | 30,000 | ASME B18.2.1 | 1 | 000000000 | 0000 |
| 2 1/2" | Fully Threaded | Coarse | 9/16" | 15/64" | 30,000 | ASME B18.2.1 | 1 | 000000000 | 0000 |
| 3" | Fully Threaded | Coarse | 9/16" | 15/64" | 30,000 | ASME B18.2.1 | 1 | 000000000 | 0000 |
1/2"-13 | |||||||||
| 1" | Fully Threaded | Coarse | 3/4" | 5/16" | 30,000 | ASME B18.2.1 | 1 | 000000000 | 0000 |
| 1 1/2" | Fully Threaded | Coarse | 3/4" | 5/16" | 30,000 | ASME B18.2.1 | 1 | 000000000 | 0000 |
| 2" | Fully Threaded | Coarse | 3/4" | 5/16" | 30,000 | ASME B18.2.1 | 1 | 000000000 | 0000 |
| 2 1/2" | Fully Threaded | Coarse | 3/4" | 5/16" | 30,000 | ASME B18.2.1 | 1 | 000000000 | 0000 |
| 3" | Fully Threaded | Coarse | 3/4" | 5/16" | 30,000 | ASME B18.2.1 | 1 | 000000000 | 0000 |
3/4"-10 | |||||||||
| 2" | Fully Threaded | Coarse | 1 1/8" | 15/32" | 30,000 | ASME B18.2.1 | 1 | 000000000 | 00000 |
| 2 1/2" | Fully Threaded | Coarse | 1 1/8" | 15/32" | 30,000 | ASME B18.2.1 | 1 | 000000000 | 00000 |
| 3" | Fully Threaded | Coarse | 1 1/8" | 15/32" | 30,000 | ASME B18.2.1 | 1 | 000000000 | 00000 |
M6 × 1 mm | |||||||||
| 12mm | Fully Threaded | Coarse | 10mm | 4mm | 30,000 | ISO 4017, DIN 933 | 1 | 000000000 | 0000 |
| 16mm | Fully Threaded | Coarse | 10mm | 4mm | 30,000 | ISO 4017, DIN 933 | 1 | 000000000 | 0000 |
| 20mm | Fully Threaded | Coarse | 10mm | 4mm | 30,000 | ISO 4017, DIN 933 | 1 | 000000000 | 0000 |
| 25mm | Fully Threaded | Coarse | 10mm | 4mm | 30,000 | ISO 4017, DIN 933 | 1 | 000000000 | 0000 |
| 30mm | Fully Threaded | Coarse | 10mm | 4mm | 30,000 | ISO 4017, DIN 933 | 1 | 000000000 | 0000 |
| 40mm | Fully Threaded | Coarse | 10mm | 4mm | 30,000 | ISO 4017, DIN 933 | 1 | 000000000 | 0000 |
M8 × 1.25 mm | |||||||||
| 16mm | Fully Threaded | Coarse | 13mm | 5.3mm | 30,000 | ISO 4017, DIN 933 | 1 | 000000000 | 0000 |
| 20mm | Fully Threaded | Coarse | 13mm | 5.3mm | 30,000 | ISO 4017, DIN 933 | 1 | 000000000 | 0000 |
| 25mm | Fully Threaded | Coarse | 13mm | 5.3mm | 30,000 | ISO 4017, DIN 933 | 1 | 000000000 | 0000 |
| 30mm | Fully Threaded | Coarse | 13mm | 5.3mm | 30,000 | ISO 4017, DIN 933 | 1 | 000000000 | 0000 |
| 35mm | Fully Threaded | Coarse | 13mm | 5.3mm | 30,000 | ISO 4017, DIN 933 | 1 | 000000000 | 0000 |
| 40mm | Fully Threaded | Coarse | 13mm | 5.3mm | 30,000 | ISO 4017, DIN 933 | 1 | 000000000 | 0000 |
| 50mm | Fully Threaded | Coarse | 13mm | 5.3mm | 30,000 | ISO 4017, DIN 933 | 1 | 000000000 | 0000 |
Aluminum Flanged Hex Head Screws
One-third the weight of steel screws, these aluminum screws also resist corrosion from salt water and mild chemicals. The flange distributes pressure where the screw meets the surface, so you don’t need a separate washer. All screws meet either IFI or DIN specifications for dimensions. Head height includes the flange. Length is measured from under the flange.
Black-anodized screws provide additional corrosion-resistance and a finished look.
Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.
Head | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Threading | Thread Spacing | Wd. | Ht. | Flange Dia. | Tensile Strength, psi | Specifications Met | Pkg. Qty. | Pkg. | |
Black-Anodized Aluminum | ||||||||||
1/4"-20 | ||||||||||
| 1/2" | Fully Threaded | Coarse | 3/8" | 9/32" | 9/16" | 58,000 | IFI 111 | 10 | 000000000 | 000000 |
| 1" | Fully Threaded | Coarse | 3/8" | 9/32" | 9/16" | 58,000 | IFI 111 | 10 | 000000000 | 00000 |
| 1 1/2" | Fully Threaded | Coarse | 3/8" | 9/32" | 9/16" | 58,000 | IFI 111 | 10 | 000000000 | 00000 |
| 2" | Fully Threaded | Coarse | 3/8" | 9/32" | 9/16" | 58,000 | IFI 111 | 10 | 000000000 | 00000 |
3/8"-16 | ||||||||||
| 3/4" | Fully Threaded | Coarse | 9/16" | 25/64" | 13/16" | 58,000 | IFI 111 | 5 | 000000000 | 00000 |
| 1" | Fully Threaded | Coarse | 9/16" | 25/64" | 13/16" | 58,000 | IFI 111 | 5 | 000000000 | 00000 |
| 1 1/2" | Fully Threaded | Coarse | 9/16" | 25/64" | 13/16" | 58,000 | IFI 111 | 5 | 000000000 | 00000 |
| 2" | Fully Threaded | Coarse | 9/16" | 25/64" | 13/16" | 58,000 | IFI 111 | 5 | 000000000 | 00000 |
1/2"-13 | ||||||||||
| 1" | Fully Threaded | Coarse | 3/4" | 33/64" | 1 5/64" | 58,000 | IFI 111 | 1 | 000000000 | 0000 |
| 1 1/2" | Fully Threaded | Coarse | 3/4" | 33/64" | 1 5/64" | 58,000 | IFI 111 | 1 | 000000000 | 0000 |
| 2" | Fully Threaded | Coarse | 3/4" | 33/64" | 1 5/64" | 58,000 | IFI 111 | 1 | 000000000 | 0000 |
| 3" | Fully Threaded | Coarse | 3/4" | 33/64" | 1 5/64" | 58,000 | IFI 111 | 1 | 000000000 | 0000 |
Aluminum Socket Head Screws
Fully Threaded
Partially Threaded
Aluminum screws are one-third the weight of steel and have good corrosion resistance. Length is measured from under the head.
Screws with a blue-anodized finish are easy to distinguish.
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.
Head | Blue-Anodized 7075 Aluminum | |||||||
|---|---|---|---|---|---|---|---|---|
| Lg. | Threading | Thread Spacing | Dia. | Ht. | Drive Size | Pkg. Qty. | Pkg. | |
2-56 | ||||||||
| 1/8" | Fully Threaded | Coarse | 9/64" | 0.086" | 5/64" | 10 | 000000000 | 000000 |
| 3/16" | Fully Threaded | Coarse | 9/64" | 0.086" | 5/64" | 10 | 000000000 | 00000 |
| 1/4" | Fully Threaded | Coarse | 9/64" | 0.086" | 5/64" | 10 | 000000000 | 00000 |
| 3/8" | Fully Threaded | Coarse | 9/64" | 0.086" | 5/64" | 5 | 000000000 | 0000 |
| 1/2" | Fully Threaded | Coarse | 9/64" | 0.086" | 5/64" | 10 | 000000000 | 00000 |
4-40 | ||||||||
| 3/16" | Fully Threaded | Coarse | 0.183" | 0.112" | 3/32" | 10 | 000000000 | 00000 |
| 1/4" | Fully Threaded | Coarse | 0.183" | 0.112" | 3/32" | 10 | 000000000 | 00000 |
| 5/16" | Fully Threaded | Coarse | 0.183" | 0.112" | 3/32" | 10 | 000000000 | 00000 |
| 3/8" | Fully Threaded | Coarse | 0.183" | 0.112" | 3/32" | 10 | 000000000 | 00000 |
| 1/2" | Fully Threaded | Coarse | 0.183" | 0.112" | 3/32" | 10 | 000000000 | 00000 |
| 5/8" | Fully Threaded | Coarse | 0.183" | 0.112" | 3/32" | 10 | 000000000 | 00000 |
| 3/4" | Fully Threaded | Coarse | 0.183" | 0.112" | 3/32" | 10 | 000000000 | 00000 |
| 1" | Fully Threaded | Coarse | 0.183" | 0.112" | 3/32" | 5 | 000000000 | 00000 |
6-32 | ||||||||
| 1/4" | Fully Threaded | Coarse | 0.226" | 0.138" | 7/64" | 10 | 000000000 | 00000 |
| 3/8" | Fully Threaded | Coarse | 0.226" | 0.138" | 7/64" | 10 | 000000000 | 00000 |
| 1/2" | Fully Threaded | Coarse | 0.226" | 0.138" | 7/64" | 10 | 000000000 | 00000 |
| 5/8" | Fully Threaded | Coarse | 0.226" | 0.138" | 7/64" | 10 | 000000000 | 00000 |
| 3/4" | Fully Threaded | Coarse | 0.226" | 0.138" | 7/64" | 10 | 000000000 | 00000 |
| 1" | Fully Threaded | Coarse | 0.226" | 0.138" | 7/64" | 10 | 000000000 | 00000 |
M4 | ||||||||
| 8mm | Fully Threaded | Coarse | 7.22mm | 4mm | 3 mm | 5 | 000000000 | 0000 |
| 10mm | Fully Threaded | Coarse | 7.22mm | 4mm | 3 mm | 5 | 000000000 | 0000 |
| 12mm | Fully Threaded | Coarse | 7.22mm | 4mm | 3 mm | 5 | 000000000 | 0000 |
Head | Blue-Anodized 2024 Aluminum | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Lg. | Threading | Min. Thread Lg. | Thread Spacing | Dia. | Ht. | Drive Size | Pkg. Qty. | Pkg. | |
8-32 | |||||||||
| 1/4" | Fully Threaded | __ | Coarse | 0.27" | 0.164" | 9/64" | 5 | 000000000 | 000000 |
| 3/8" | Fully Threaded | __ | Coarse | 0.27" | 0.164" | 9/64" | 10 | 000000000 | 00000 |
| 1/2" | Fully Threaded | __ | Coarse | 0.27" | 0.164" | 9/64" | 5 | 000000000 | 00000 |
| 5/8" | Fully Threaded | __ | Coarse | 0.27" | 0.164" | 9/64" | 5 | 000000000 | 00000 |
| 3/4" | Fully Threaded | __ | Coarse | 0.27" | 0.164" | 9/64" | 10 | 000000000 | 00000 |
| 1" | Fully Threaded | __ | Coarse | 0.27" | 0.164" | 9/64" | 1 | 000000000 | 0000 |
10-32 | |||||||||
| 1/4" | Fully Threaded | __ | Fine | 5/16" | 0.19" | 5/32" | 10 | 000000000 | 00000 |
| 3/8" | Fully Threaded | __ | Fine | 5/16" | 0.19" | 5/32" | 10 | 000000000 | 00000 |
| 1/2" | Fully Threaded | __ | Fine | 5/16" | 0.19" | 5/32" | 10 | 000000000 | 00000 |
| 3/4" | Fully Threaded | __ | Fine | 5/16" | 0.19" | 5/32" | 10 | 000000000 | 00000 |
1/4"-20 | |||||||||
| 3/8" | Fully Threaded | __ | Coarse | 3/8" | 1/4" | 3/16" | 10 | 000000000 | 00000 |
| 1/2" | Fully Threaded | __ | Coarse | 3/8" | 1/4" | 3/16" | 10 | 000000000 | 00000 |
| 5/8" | Fully Threaded | __ | Coarse | 3/8" | 1/4" | 3/16" | 5 | 000000000 | 00000 |
| 3/4" | Fully Threaded | __ | Coarse | 3/8" | 1/4" | 3/16" | 5 | 000000000 | 00000 |
| 1" | Fully Threaded | __ | Coarse | 3/8" | 1/4" | 3/16" | 1 | 000000000 | 0000 |
| 1 1/4" | Fully Threaded | __ | Coarse | 3/8" | 1/4" | 3/16" | 1 | 000000000 | 0000 |
| 1 1/2" | Partially Threaded | 1" | Coarse | 3/8" | 1/4" | 3/16" | 1 | 000000000 | 0000 |