About Hex Head Screws and Bolts
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Low-Strength Steel Flanged Hex Head Screws
About half as strong as medium-strength steel screws, these screws are best for light duty fastening applications, such as securing access panels. The flange distributes pressure where the screw meets the surface, so you don’t need a separate washer. All screws meet IFI specifications for dimensions and SAE specifications for material quality. Head height includes the flange. Length is measured from under the flange.
Zinc-plated screws are a good choice for most applications. They resist corrosion in wet environments.
Zinc-flake-coated screws have a multilayer finish that resists mild chemicals and provides long-term corrosion resistance. These screws are about five times as corrosion resistant as zinc-plated screws, standing up to 720 hours of salt spray per ASTM B117 standards. They also meet ASTM F3393 specifications for appearance and performance. An embedded lubricant keeps them from sticking during installation. To maintain their corrosion resistance, use them with zinc-flake-coated steel nuts.
Hot-dipped galvanized screws are 10 times more corrosion resistant than zinc-plated screws. The finish is thicker than other finishes, so you can only use them with hot-dipped galvanized steel nuts.
Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.
Head | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Threading | Min. Thread Lg. | Thread Spacing  | Wd. | Ht. | Flange Dia. | Tensile Strength, psi | Specifications Met | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel | |||||||||||
1/4"-20 | |||||||||||
| 1/2" | Fully Threaded | __ | Coarse | 3/8" | 9/32" | 9/16" | 60,000 | IFI 111, SAE J429 | 50 | 000000000 | 00000 |
| 3/4" | Fully Threaded | __ | Coarse | 3/8" | 9/32" | 9/16" | 60,000 | IFI 111, SAE J429 | 50 | 000000000 | 0000 |
| 1" | Fully Threaded | __ | Coarse | 3/8" | 9/32" | 9/16" | 60,000 | IFI 111, SAE J429 | 50 | 000000000 | 0000 |
| 2" | Partially Threaded | 3/4" | Coarse | 3/8" | 9/32" | 9/16" | 60,000 | IFI 111, SAE J429 | 25 | 000000000 | 0000 |
3/8"-16 | |||||||||||
| 3/4" | Fully Threaded | __ | Coarse | 9/16" | 25/64" | 13/16" | 60,000 | IFI 111, SAE J429 | 25 | 000000000 | 00000 |
| 1" | Fully Threaded | __ | Coarse | 9/16" | 25/64" | 13/16" | 60,000 | IFI 111, SAE J429 | 25 | 000000000 | 00000 |
| 2" | Partially Threaded | 1" | Coarse | 9/16" | 25/64" | 13/16" | 60,000 | IFI 111, SAE J429 | 10 | 000000000 | 0000 |
| 3" | Partially Threaded | 1" | Coarse | 9/16" | 25/64" | 13/16" | 60,000 | IFI 111, SAE J429 | 10 | 000000000 | 00000 |
1/2"-13 | |||||||||||
| 1" | Fully Threaded | __ | Coarse | 3/4" | 33/64" | 1 5/64" | 60,000 | IFI 111, SAE J429 | 10 | 000000000 | 00000 |
| 1 1/2" | Fully Threaded | __ | Coarse | 3/4" | 33/64" | 1 5/64" | 60,000 | IFI 111, SAE J429 | 10 | 000000000 | 0000 |
| 2" | Partially Threaded | 1 1/4" | Coarse | 3/4" | 33/64" | 1 5/64" | 60,000 | IFI 111, SAE J429 | 10 | 000000000 | 00000 |
| 3" | Partially Threaded | 1 1/4" | Coarse | 3/4" | 33/64" | 1 5/64" | 60,000 | IFI 111, SAE J429 | 5 | 000000000 | 0000 |
Zinc-Flake-Coated Steel | |||||||||||
1/4"-20 | |||||||||||
| 1/2" | Fully Threaded | __ | Coarse | 3/8" | 9/32" | 9/16" | 60,000 | ASTM B117, ASTM F3393, IFI 111, SAE J429 | 50 | 000000000 | 00000 |
| 3/4" | Fully Threaded | __ | Coarse | 3/8" | 9/32" | 9/16" | 60,000 | ASTM B117, ASTM F3393, IFI 111, SAE J429 | 50 | 000000000 | 00000 |
| 1" | Fully Threaded | __ | Coarse | 3/8" | 9/32" | 9/16" | 60,000 | ASTM B117, ASTM F3393, IFI 111, SAE J429 | 50 | 000000000 | 00000 |
| 2" | Partially Threaded | 3/4" | Coarse | 3/8" | 9/32" | 9/16" | 60,000 | ASTM B117, ASTM F3393, IFI 111, SAE J429 | 25 | 000000000 | 00000 |
Hot-Dipped Galvanized Steel | |||||||||||
3/8"-16 | |||||||||||
| 3/4" | Fully Threaded | __ | Coarse | 9/16" | 25/64" | 13/16" | 60,000 | IFI 111, SAE J429 | 25 | 000000000 | 00000 |
| 1" | Fully Threaded | __ | Coarse | 9/16" | 25/64" | 13/16" | 60,000 | IFI 111, SAE J429 | 25 | 000000000 | 00000 |
| 2" | Partially Threaded | 1" | Coarse | 9/16" | 25/64" | 13/16" | 60,000 | IFI 111, SAE J429 | 10 | 000000000 | 00000 |
| 3" | Partially Threaded | 1" | Coarse | 9/16" | 25/64" | 13/16" | 60,000 | IFI 111, SAE J429 | 10 | 000000000 | 00000 |
1/2"-13 | |||||||||||
| 1" | Fully Threaded | __ | Coarse | 3/4" | 33/64" | 1 5/64" | 60,000 | IFI 111, SAE J429 | 10 | 000000000 | 00000 |
| 1 1/2" | Fully Threaded | __ | Coarse | 3/4" | 33/64" | 1 5/64" | 60,000 | IFI 111, SAE J429 | 10 | 000000000 | 00000 |
| 2" | Partially Threaded | 1 1/4" | Coarse | 3/4" | 33/64" | 1 5/64" | 60,000 | IFI 111, SAE J429 | 10 | 000000000 | 00000 |
| 3" | Partially Threaded | 1 1/4" | Coarse | 3/4" | 33/64" | 1 5/64" | 60,000 | IFI 111, SAE J429 | 5 | 000000000 | 00000 |