Filter by
System of Measurement
Thread Size
Threading
Material
Tensile Strength
Finish
Drive Style
Socket Head Profile
Specifications Met
DFARS Specialty Metals
Thread Spacing
REACH
Export Control Classification Number (ECCN)
Steel Socket Head Screws
 |
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.
Head | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Lg. | Dia. | Ht. | Threading | Thread Spacing | Tensile Strength, psi | Pkg. Qty. | Pkg. | |||
Black-Oxide Alloy Steel | ||||||||||
1 1/8"-7 | ||||||||||
| 3" | 1.688" | 1 1/8" | Fully Threaded | Coarse | 170,000 | 1 | 91251A163 | 000000 | ||
| 3 1/2" | 1.688" | 1 1/8" | Partially Threaded | Coarse | 170,000 | 1 | 91251A388 | 00000 | ||
| 4" | 1.688" | 1 1/8" | Partially Threaded | Coarse | 170,000 | 1 | 91251A165 | 00000 | ||
| 4 1/2" | 1.688" | 1 1/8" | Partially Threaded | Coarse | 170,000 | 1 | 91251A390 | 00000 | ||
| 5" | 1.688" | 1 1/8" | Partially Threaded | Coarse | 170,000 | 1 | 91251A169 | 00000 | ||
| 5 1/2" | 1.688" | 1 1/8" | Partially Threaded | Coarse | 170,000 | 1 | 91251A398 | 00000 | ||
| 6" | 1.688" | 1 1/8" | Partially Threaded | Coarse | 170,000 | 1 | 91251A167 | 00000 | ||
| 6 1/2" | 1.688" | 1 1/8" | Partially Threaded | Coarse | 170,000 | 1 | 91251A399 | 00000 | ||
| 7" | 1.688" | 1 1/8" | Partially Threaded | Coarse | 170,000 | 1 | 91251A174 | 00000 | ||
| 8" | 1.688" | 1 1/8" | Partially Threaded | Coarse | 170,000 | 1 | 91251A176 | 00000 | ||
| 9" | 1.688" | 1 1/8" | Partially Threaded | Coarse | 170,000 | 1 | 91251A177 | 00000 | ||
| 10" | 1.688" | 1 1/8" | Partially Threaded | Coarse | 170,000 | 1 | 91251A181 | 00000 | ||
Steel Hex-Drive Shoulder Screws
 |
Our strongest standard-fit shoulder screws. With the highest tensile strength, they withstand stress and mechanical loads that would break other materials, such as aluminum, nickel, and stainless steel. However, they do sacrifice corrosion resistance.
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.
Head | Certificate | Each | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Shoulder Lg. | Thread Size | Thread Lg. | Dia. | Ht. | Drive Size | Tensile Strength, psi | Specs. Met | Type | Form | 1-4 | 5-Up | |||
Black-Oxide Alloy Steel | ||||||||||||||
1 1/2" Diameter Shoulder (-0.004" to -0.002" Tolerance) | ||||||||||||||
| 1 1/2" | 1 1/8"-7 | 1 1/2" | 2 1/8" | 1" | 7/8" | 140,000 | ASME B18.3 | — | — | 91259A351 | 000000 | 000000 | ||
| 1 3/4" | 1 1/8"-7 | 1 1/2" | 2 1/8" | 1" | 7/8" | 140,000 | ASME B18.3 | — | — | 91259A354 | 00000 | 00000 | ||
| 2" | 1 1/8"-7 | 1 1/2" | 2 1/8" | 1" | 7/8" | 140,000 | ASME B18.3 | Material Certificate | Digital | 91259A357 | 00000 | 00000 | ||
| 2 1/2" | 1 1/8"-7 | 1 1/2" | 2 1/8" | 1" | 7/8" | 140,000 | ASME B18.3 | — | — | 91259A360 | 00000 | 00000 | ||
| 3" | 1 1/8"-7 | 1 1/2" | 2 1/8" | 1" | 7/8" | 140,000 | ASME B18.3 | Material Certificate | Digital | 91259A363 | 00000 | 00000 | ||
| 3 1/2" | 1 1/8"-7 | 1 1/2" | 2 1/8" | 1" | 7/8" | 140,000 | ASME B18.3 | — | — | 91259A366 | 00000 | 00000 | ||
| 4" | 1 1/8"-7 | 1 1/2" | 2 1/8" | 1" | 7/8" | 140,000 | ASME B18.3 | — | — | 91259A370 | 00000 | 00000 | ||
| 5" | 1 1/8"-7 | 1 1/2" | 2 1/8" | 1" | 7/8" | 140,000 | ASME B18.3 | — | — | 91259A373 | 00000 | 00000 | ||
| 6" | 1 1/8"-7 | 1 1/2" | 2 1/8" | 1" | 7/8" | 140,000 | ASME B18.3 | — | — | 91259A376 | 00000 | 00000 | ||
Stainless Steel Hex-Drive Shoulder Screws
 |
These screws hold up against moisture and chemicals better than their steel counterparts, but they aren't as strong.
Check out our Made-to-Order Stainless Steel Hex-Drive Shoulder Screws if you don't see the shoulder length you need.
Highly Corrosion-Resistant Black-Oxide 316 Stainless Steel—Combines a finished appearance with the rust resistance of 316 stainless steel. Even if the coating wears off, these screws will hold up against corrosive agents in most environments, including salt water and most chemicals.
%20--%3e%3cg%3e%3cg%20id='Layer_1'%3e%3cpath%20class='cls-1'%20d='M68,27.2c-14.6,0-26.4,11.7-26.4,26.3,0,7,2.8,13.7,7.7,18.7v44.8l18.8-16.1,18.7,16.1v-44.9c10.3-10.3,10.3-27,0-37.3-5-4.9-11.7-7.7-18.7-7.7h0ZM81.3,105l-13.2-11.4-13.2,11.4v-28.7c8.2,4.8,18.3,4.8,26.5,0v28.7ZM76.2,70.8c-5.2,2.5-11.2,2.5-16.4,0-9.5-4.5-13.5-15.9-9-25.4,4.5-9.5,15.9-13.5,25.4-9,9.5,4.5,13.5,15.9,9,25.4-1.9,4-5.1,7.1-9,9Z'/%3e%3cpath%20class='cls-2'%20d='M5.8,95.5c-1.2,0-2.1-1-2.1-2.1,0,0,0,0,0,0V29.4h20.9c2.1,0,3.8-1.7,3.8-3.8V3.7c.2,0,.4,0,.5,0h37.5c1.2,0,2.1,1,2.1,2.1v18.6c1.2,0,2.5.1,3.7.3V5.8C72.2,2.6,69.6,0,66.4,0H28.9c-1.5,0-3,.6-4.1,1.7h-.1c0,.1-23,23.2-23,23.2-1.1,1.1-1.7,2.6-1.7,4.1v64.3c0,3.2,2.6,5.8,5.8,5.8h41.7v-3.7H5.8ZM24.7,7.1v18.7H6L24.7,7.1Z'/%3e%3c/g%3e%3c/g%3e%3c/svg%3e)
Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.
Head | Certificate | Each | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Shoulder Lg. | Thread Size | Thread Lg. | Dia. | Ht. | Drive Size | Tensile Strength, psi | Specs. Met | Type | Form | 1-4 | 5-Up | |||
Highly Corrosion-Resistant Black-Oxide 316 Stainless Steel | ||||||||||||||
1 1/2" Diameter Shoulder (-0.004" to -0.002" Tolerance) | ||||||||||||||
| 1" | 1 1/8"-7 | 1 1/2" | 2 1/8" | 1" | 7/8" | 70,000 | ASME B18.3 | Material Certificate | Digital | 8077A257 | 0000000 | 0000000 | ||
| 1 1/4" | 1 1/8"-7 | 1 1/2" | 2 1/8" | 1" | 7/8" | 70,000 | ASME B18.3 | Material Certificate | Digital | 8077A267 | 000000 | 000000 | ||
| 1 1/2" | 1 1/8"-7 | 1 1/2" | 2 1/8" | 1" | 7/8" | 70,000 | ASME B18.3 | Material Certificate | Digital | 8077A264 | 000000 | 000000 | ||
| 1 3/4" | 1 1/8"-7 | 1 1/2" | 2 1/8" | 1" | 7/8" | 70,000 | ASME B18.3 | Material Certificate | Digital | 8077A268 | 000000 | 000000 | ||
| 2" | 1 1/8"-7 | 1 1/2" | 2 1/8" | 1" | 7/8" | 70,000 | ASME B18.3 | Material Certificate | Digital | 8077A258 | 000000 | 000000 | ||
| 2 1/2" | 1 1/8"-7 | 1 1/2" | 2 1/8" | 1" | 7/8" | 70,000 | ASME B18.3 | Material Certificate | Digital | 8077A265 | 000000 | 000000 | ||
| 3" | 1 1/8"-7 | 1 1/2" | 2 1/8" | 1" | 7/8" | 70,000 | ASME B18.3 | Material Certificate | Digital | 8077A259 | 000000 | 000000 | ||
| 3 1/2" | 1 1/8"-7 | 1 1/2" | 2 1/8" | 1" | 7/8" | 70,000 | ASME B18.3 | Material Certificate | Digital | 8077A266 | 000000 | 000000 | ||
| 4" | 1 1/8"-7 | 1 1/2" | 2 1/8" | 1" | 7/8" | 70,000 | ASME B18.3 | Material Certificate | Digital | 8077A261 | 000000 | 000000 | ||
| 5" | 1 1/8"-7 | 1 1/2" | 2 1/8" | 1" | 7/8" | 70,000 | ASME B18.3 | Material Certificate | Digital | 8077A262 | 000000 | 000000 | ||
| 6" | 1 1/8"-7 | 1 1/2" | 2 1/8" | 1" | 7/8" | 70,000 | ASME B18.3 | Material Certificate | Digital | 8077A263 | 000000 | 000000 | ||
Steel Hex-Drive Flat Head Screws
 |
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.
Steel Cup-Tip Set Screws
