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Steel Socket Head Screws
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Fully Threaded | Partially Threaded |
Made of alloy steel, these screws are the standard for high-strength fastening. Use them in high-load applications such as dies, presses, and heavy equipment. The deep, six-point socket keeps the hex key from slipping out and damaging the drive.
Length is measured from under the head.
Black-Oxide Alloy Steel—Typically chosen for their appearance, these screws have a dark, matte coating to create a finished look. They offer minimal corrosion resistance, so they're best for dry environments.
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Lg. | Dia. | Ht. | Threading | Thread Spacing | Tensile Strength, psi | Specs. Met | Pkg. Qty. | Pkg. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Black-Oxide Alloy Steel | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
7/8"-14 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 2 1/4" | 1 5/16" | 7/8" | Fully Threaded | Fine | 170,000 | ASTM A574 | 1 | 91251A307 | 00000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 2 1/2" | 1 5/16" | 7/8" | Fully Threaded | Fine | 170,000 | ASTM A574 | 1 | 91251A308 | 00000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 3" | 1 5/16" | 7/8" | Fully Threaded | Fine | 170,000 | ASTM A574 | 1 | 91251A309 | 00000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 3 1/2" | 1 5/16" | 7/8" | Partially Threaded | Fine | 170,000 | ASTM A574 | 1 | 91251A312 | 00000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 4" | 1 5/16" | 7/8" | Partially Threaded | Fine | 170,000 | ASTM A574 | 1 | 91251A313 | 00000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 4 1/2" | 1 5/16" | 7/8" | Partially Threaded | Fine | 170,000 | ASTM A574 | 1 | 91251A319 | 00000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 5" | 1 5/16" | 7/8" | Partially Threaded | Fine | 170,000 | ASTM A574 | 1 | 91251A314 | 00000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 6" | 1 5/16" | 7/8" | Partially Threaded | Fine | 170,000 | ASTM A574 | 1 | 91251A317 | 00000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 7" | 1 5/16" | 7/8" | Partially Threaded | Fine | 170,000 | ASTM A574 | 1 | 91251A316 | 00000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Steel Hex-Drive Flat Head Screws
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Our strongest hex-drive flat head screws. They're made of alloy steel, so they have nearly twice the tensile strength of other screws. With six contact points, the hex drive withstands more torque than slotted and Phillips to securely grip your driver without slipping and stripping the drive.
Length is measured from the top of the head.
Black-Oxide Alloy Steel—Typically chosen for their appearance, these screws have a dark, matte coating to create a finished look. They offer minimal corrosion resistance, so they're best for dry environments.
Standard Profile—Standard-profile heads are the most common choice for flat head screws.
