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About Hex Head Screws and Bolts
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Choose a hex head fastener with the right threading, thread size, material, and strength for your equipment.
Steel Heavy Hex Head Structural Screws
 |
Fully Threaded |
 |
Partially Threaded |
Secure structural joints, such as mating I-beams, columns, and joists. With a head that's about 10% wider than standard hex head screws, these handle heavier loads by distributing them over a larger area. The head also has six flat sides to keep wrenches and sockets from slipping and rounding off the drive.
Length is measured from under the head.
High-Strength Fastener—Commonly used to fasten components in valves, pumps, motors, and other high-stress applications. These screws have a tensile strength of 125,000 to 160,000 psi.
Zinc-Flake-Coated Steel—The coating is tested to extreme standards, including at least 720 hours of salt spray resistance, to hold up in wet and outdoor environments. An embedded lubricant makes these screws easier to install than corrosion-resistant-coated screws.
Grip Length—Screws with a grip length have a precisely measured unthreaded section under the head, called a grip. It's stronger than the threaded section, so you can place it in joints exposed to sideways forces.
Head | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Lg. | Grip Lg. | Wd. | Ht. | Threading | Thread Spacing | Fastener Strength Grade/Class | Tensile Strength, psi | Specs. Met | Pkg. Qty. | Pkg. | |||
High-Strength Steel | |||||||||||||
5/8"-11 | |||||||||||||
| 1 3/4" | 1/2" | 1 1/16" | 25/64" | Partially Threaded | Coarse | ASTM Grade A490 | 150,000 | ASME B18.2.6 ASTM A490 ASTM F3125 | 10 | 90175A131 | 000000 | ||
| 2" | 3/4" | 1 1/16" | 25/64" | Partially Threaded | Coarse | ASTM Grade A490 | 150,000 | ASME B18.2.6 ASTM A490 ASTM F3125 | 10 | 90175A141 | 00000 | ||
| 2 1/4" | 1" | 1 1/16" | 25/64" | Partially Threaded | Coarse | ASTM Grade A490 | 150,000 | ASME B18.2.6 ASTM A490 ASTM F3125 | 5 | 90175A132 | 0000 | ||
| 2 1/2" | 1 1/4" | 1 1/16" | 25/64" | Partially Threaded | Coarse | ASTM Grade A490 | 150,000 | ASME B18.2.6 ASTM A490 ASTM F3125 | 5 | 90175A133 | 0000 | ||
3/4"-10 | |||||||||||||
| 1 1/2" | — | 1 1/4" | 15/32" | Fully Threaded | Coarse | ASTM Grade A490 | 150,000 | ASME B18.2.6 ASTM A490 ASTM F3125 | 5 | 90175A134 | 00000 | ||
| 1 3/4" | 3/8" | 1 1/4" | 15/32" | Partially Threaded | Coarse | ASTM Grade A490 | 150,000 | ASME B18.2.6 ASTM A490 ASTM F3125 | 5 | 90175A111 | 00000 | ||
| 2" | 5/8" | 1 1/4" | 15/32" | Partially Threaded | Coarse | ASTM Grade A490 | 150,000 | ASME B18.2.6 ASTM A490 ASTM F3125 | 5 | 90175A112 | 00000 | ||
| 2 1/4" | 7/8" | 1 1/4" | 15/32" | Partially Threaded | Coarse | ASTM Grade A490 | 150,000 | ASME B18.2.6 ASTM A490 ASTM F3125 | 5 | 90175A130 | 00000 | ||
| 2 1/2" | 1 1/8" | 1 1/4" | 15/32" | Partially Threaded | Coarse | ASTM Grade A490 | 150,000 | ASME B18.2.6 ASTM A490 ASTM F3125 | 5 | 90175A114 | 00000 | ||
| 2 3/4" | 1 3/8" | 1 1/4" | 15/32" | Partially Threaded | Coarse | ASTM Grade A490 | 150,000 | ASME B18.2.6 ASTM A490 ASTM F3125 | 5 | 90175A115 | 00000 | ||
| 3" | 1 5/8" | 1 1/4" | 15/32" | Partially Threaded | Coarse | ASTM Grade A490 | 150,000 | ASME B18.2.6 ASTM A490 ASTM F3125 | 5 | 90175A116 | 00000 | ||
| 3 1/4" | 1 7/8" | 1 1/4" | 15/32" | Partially Threaded | Coarse | ASTM Grade A490 | 150,000 | ASME B18.2.6 ASTM A490 ASTM F3125 | 5 | 90175A117 | 00000 | ||
| 3 1/2" | 2 1/8" | 1 1/4" | 15/32" | Partially Threaded | Coarse | ASTM Grade A490 | 150,000 | ASME B18.2.6 ASTM A490 ASTM F3125 | 5 | 90175A118 | 00000 | ||
| 4" | 2 5/8" | 1 1/4" | 15/32" | Partially Threaded | Coarse | ASTM Grade A490 | 150,000 | ASME B18.2.6 ASTM A490 ASTM F3125 | 1 | 90175A142 | 0000 | ||
7/8"-9 | |||||||||||||
| 2" | — | 1 7/16" | 35/64" | Fully Threaded | Coarse | ASTM Grade A490 | 150,000 | ASME B18.2.6 ASTM A490 ASTM F3125 | 1 | 90175A153 | 0000 | ||
| 2 1/2" | 1" | 1 7/16" | 35/64" | Partially Threaded | Coarse | ASTM Grade A490 | 150,000 | ASME B18.2.6 ASTM A490 ASTM F3125 | 1 | 90175A143 | 0000 | ||
| 3" | 1 1/2" | 1 7/16" | 35/64" | Partially Threaded | Coarse | ASTM Grade A490 | 150,000 | ASME B18.2.6 ASTM A490 ASTM F3125 | 1 | 90175A148 | 0000 | ||
| 3 1/2" | 2" | 1 7/16" | 35/64" | Partially Threaded | Coarse | ASTM Grade A490 | 150,000 | ASME B18.2.6 ASTM A490 ASTM F3125 | 1 | 90175A154 | 0000 | ||
1"-8 | |||||||||||||
| 2 1/2" | 3/4" | 1 5/8" | 39/64" | Partially Threaded | Coarse | ASTM Grade A490 | 150,000 | ASME B18.2.6 ASTM A490 ASTM F3125 | 1 | 90175A144 | 0000 | ||
| 3" | 1 1/4" | 1 5/8" | 39/64" | Partially Threaded | Coarse | ASTM Grade A490 | 150,000 | ASME B18.2.6 ASTM A490 ASTM F3125 | 1 | 90175A145 | 0000 | ||
| 3 1/2" | 1 3/4" | 1 5/8" | 39/64" | Partially Threaded | Coarse | ASTM Grade A490 | 150,000 | ASME B18.2.6 ASTM A490 ASTM F3125 | 1 | 90175A146 | 0000 | ||
| 4" | 2 3/4" | 1 5/8" | 39/64" | Partially Threaded | Coarse | ASTM Grade A490 | 150,000 | ASME B18.2.6 ASTM A490 ASTM F3125 | 1 | 90175A147 | 00000 | ||
High-Strength Zinc-Flake-Coated Steel | |||||||||||||
5/8"-11 | |||||||||||||
| 1 1/2" | — | 1 1/16" | 25/64" | Fully Threaded | Coarse | ASTM Grade A490 | 150,000 | ASME B18.2.6 ASTM A490 ASTM B117 ASTM F3125 ASTM F3393 | 10 | 90175A135 | 00000 | ||
| 2" | 3/4" | 1 1/16" | 25/64" | Partially Threaded | Coarse | ASTM Grade A490 | 150,000 | ASME B18.2.6 ASTM A490 ASTM B117 ASTM F3125 ASTM F3393 | 10 | 90175A149 | 00000 | ||
| 2 1/2" | 1 1/4" | 1 1/16" | 25/64" | Partially Threaded | Coarse | ASTM Grade A490 | 150,000 | ASME B18.2.6 ASTM A490 ASTM B117 ASTM F3125 ASTM F3393 | 5 | 90175A136 | 00000 | ||
| 3" | 1 3/4" | 1 1/16" | 25/64" | Partially Threaded | Coarse | ASTM Grade A490 | 150,000 | ASME B18.2.6 ASTM A490 ASTM B117 ASTM F3125 ASTM F3393 | 5 | 90175A137 | 00000 | ||
3/4"-10 | |||||||||||||
| 1 1/2" | — | 1 1/4" | 15/32" | Fully Threaded | Coarse | ASTM Grade A490 | 150,000 | ASME B18.2.6 ASTM A490 ASTM B117 ASTM F3125 ASTM F3393 | 5 | 90175A138 | 00000 | ||
| 2" | 5/8" | 1 1/4" | 15/32" | Partially Threaded | Coarse | ASTM Grade A490 | 150,000 | ASME B18.2.6 ASTM A490 ASTM B117 ASTM F3125 ASTM F3393 | 5 | 90175A151 | 00000 | ||
| 3" | 1 5/8" | 1 1/4" | 15/32" | Partially Threaded | Coarse | ASTM Grade A490 | 150,000 | ASME B18.2.6 ASTM A490 ASTM B117 ASTM F3125 ASTM F3393 | 5 | 90175A152 | 00000 | ||
