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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.
Zinc-Plated Alloy Steel—A common choice for areas with occasional exposure to moisture.
Head | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Lg. | Dia. | Ht. | Threading | Thread Spacing | Tensile Strength, psi | Pkg. Qty. | Pkg. | |||
Black-Oxide Alloy Steel | ||||||||||
7/8"-9 | ||||||||||
| 1 1/4" | 1 5/16" | 7/8" | Fully Threaded | Coarse | 170,000 | 1 | 91251A877 | 00000 | ||
| 1 1/2" | 1 5/16" | 7/8" | Fully Threaded | Coarse | 170,000 | 1 | 91251A878 | 00000 | ||
| 1 3/4" | 1 5/16" | 7/8" | Fully Threaded | Coarse | 170,000 | 1 | 91251A879 | 00000 | ||
| 2" | 1 5/16" | 7/8" | Fully Threaded | Coarse | 170,000 | 1 | 91251A880 | 0000 | ||
| 2 1/4" | 1 5/16" | 7/8" | Fully Threaded | Coarse | 170,000 | 1 | 91251A881 | 0000 | ||
| 2 1/2" | 1 5/16" | 7/8" | Fully Threaded | Coarse | 170,000 | 1 | 91251A882 | 0000 | ||
| 2 3/4" | 1 5/16" | 7/8" | Fully Threaded | Coarse | 170,000 | 1 | 91251A883 | 0000 | ||
| 3" | 1 5/16" | 7/8" | Fully Threaded | Coarse | 170,000 | 1 | 91251A884 | 0000 | ||
| 3 1/4" | 1 5/16" | 7/8" | Partially Threaded | Coarse | 170,000 | 1 | 91251A991 | 0000 | ||
| 3 1/2" | 1 5/16" | 7/8" | Partially Threaded | Coarse | 170,000 | 1 | 91251A886 | 0000 | ||
| 3 3/4" | 1 5/16" | 7/8" | Partially Threaded | Coarse | 170,000 | 1 | 91251A887 | 00000 | ||
| 4" | 1 5/16" | 7/8" | Partially Threaded | Coarse | 170,000 | 1 | 91251A532 | 00000 | ||
| 4 1/2" | 1 5/16" | 7/8" | Partially Threaded | Coarse | 170,000 | 1 | 91251A890 | 00000 | ||
| 5" | 1 5/16" | 7/8" | Partially Threaded | Coarse | 170,000 | 1 | 91251A892 | 00000 | ||
| 5 1/2" | 1 5/16" | 7/8" | Partially Threaded | Coarse | 170,000 | 1 | 91251A894 | 00000 | ||
| 6" | 1 5/16" | 7/8" | Partially Threaded | Coarse | 170,000 | 1 | 91251A896 | 00000 | ||
| 6 1/2" | 1 5/16" | 7/8" | Partially Threaded | Coarse | 170,000 | 1 | 91251A895 | 00000 | ||
| 7" | 1 5/16" | 7/8" | Partially Threaded | Coarse | 170,000 | 1 | 91251A898 | 00000 | ||
| 7 1/2" | 1 5/16" | 7/8" | Partially Threaded | Coarse | 170,000 | 1 | 91251A386 | 00000 | ||
| 8" | 1 5/16" | 7/8" | Partially Threaded | Coarse | 170,000 | 1 | 91251A900 | 00000 | ||
| 8 1/2" | 1 5/16" | 7/8" | Partially Threaded | Coarse | 170,000 | 1 | 91251A968 | 00000 | ||
| 9" | 1 5/16" | 7/8" | Partially Threaded | Coarse | 170,000 | 1 | 91251A902 | 00000 | ||
| 10" | 1 5/16" | 7/8" | Partially Threaded | Coarse | 170,000 | 1 | 91251A903 | 00000 | ||
| 12" | 1 5/16" | 7/8" | Partially Threaded | Coarse | 170,000 | 1 | 91251A905 | 00000 | ||
Zinc-Plated Alloy Steel | ||||||||||
7/8"-9 | ||||||||||
| 2" | 1 5/16" | 7/8" | Fully Threaded | Coarse | 170,000 | 1 | 90128A166 | 0000 | ||
| 3" | 1 5/16" | 7/8" | Partially Threaded | Coarse | 170,000 | 1 | 90128A167 | 0000 | ||
| 4" | 1 5/16" | 7/8" | Partially Threaded | Coarse | 170,000 | 1 | 90128A169 | 0000 | ||
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.
Head | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Lg. | Countersink Angle | Flat Head Profile | Dia. | Ht. | Threading | Tensile Strength, psi | Specs. Met | Pkg. Qty. | Pkg. | |||
Black-Oxide Alloy Steel | ||||||||||||
7/8"-9 | ||||||||||||
| 1 1/2" | 82° | Standard | 1.688" | 0.468" | Fully Threaded | 130,000 | ASTM F835 | 1 | 91253A977 | 000000 | ||
| 1 3/4" | 82° | Standard | 1.688" | 0.468" | Fully Threaded | 130,000 | ASTM F835 | 1 | 91253A978 | 00000 | ||
| 2" | 82° | Standard | 1.688" | 0.468" | Fully Threaded | 130,000 | ASTM F835 | 1 | 91253A890 | 00000 | ||
| 2 1/2" | 82° | Standard | 1.688" | 0.468" | Fully Threaded | 130,000 | ASTM F835 | 1 | 91253A894 | 00000 | ||
| 3" | 82° | Standard | 1.688" | 0.468" | Fully Threaded | 130,000 | ASTM F835 | 1 | 91253A898 | 00000 | ||
| 3 1/2" | 82° | Standard | 1.688" | 0.468" | Fully Threaded | 130,000 | ASTM F835 | 1 | 91253A901 | 00000 | ||
| 4" | 82° | Standard | 1.688" | 0.468" | Partially Threaded | 130,000 | ASTM F835 | 1 | 91253A042 | 00000 | ||
Stainless Steel Socket Head Screws
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Fully Threaded |
 |
Partially Threaded |
These screws won't rust or corrode when exposed to moisture and chemicals. Their deep, six-point socket keeps hex keys from slipping out and damaging the drive.
Length is measured from under the head.
18-8 Stainless Steel—The choice for wet and outdoor environments, these screws won't rust. However, they don't hold up to the harsh chemicals that 316 stainless steel screws can.
Highly Corrosion-Resistant 316 Stainless Steel—Superior to 18-8 stainless steel screws, these screws won't degrade when exposed to harsh weather, salt water, and most chemicals.
Head | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Lg. | Dia. | Ht. | Threading | Thread Spacing | Tensile Strength, psi | Pkg. Qty. | Pkg. | |||
18-8 Stainless Steel | ||||||||||
7/8"-9 | ||||||||||
| 2" | 1 5/16" | 7/8" | Fully Threaded | Coarse | 70,000 | 1 | 92196A880 | 000000 | ||
| 2 1/2" | 1 5/16" | 7/8" | Partially Threaded | Coarse | 70,000 | 1 | 92196A882 | 00000 | ||
| 2 3/4" | 1 5/16" | 7/8" | Partially Threaded | Coarse | 70,000 | 1 | 90696A257 | 00000 | ||
| 3" | 1 5/16" | 7/8" | Partially Threaded | Coarse | 70,000 | 1 | 92196A884 | 00000 | ||
| 3 1/2" | 1 5/16" | 7/8" | Partially Threaded | Coarse | 70,000 | 1 | 92196A865 | 00000 | ||
| 5 1/2" | 1 5/16" | 7/8" | Partially Threaded | Coarse | 70,000 | 1 | 90696A258 | 00000 | ||
| 6 1/2" | 1 5/16" | 7/8" | Partially Threaded | Coarse | 70,000 | 1 | 90696A259 | 00000 | ||
Highly Corrosion-Resistant 316 Stainless Steel | ||||||||||
7/8"-9 | ||||||||||
| 2" | 1 5/16" | 7/8" | Fully Threaded | Coarse | 70,000 | 1 | 92185A880 | 00000 | ||
| 2 1/4" | 1 5/16" | 7/8" | Fully Threaded | Coarse | 70,000 | 1 | 92185A881 | 00000 | ||
| 2 1/2" | 1 5/16" | 7/8" | Partially Threaded | Coarse | 70,000 | 1 | 92185A883 | 00000 | ||
| 3" | 1 5/16" | 7/8" | Partially Threaded | Coarse | 70,000 | 1 | 92185A886 | 00000 | ||
| 3 1/2" | 1 5/16" | 7/8" | Partially Threaded | Coarse | 70,000 | 1 | 92185A379 | 00000 | ||
| 4" | 1 5/16" | 7/8" | Partially Threaded | Coarse | 70,000 | 1 | 92185A889 | 00000 | ||
| 4 1/2" | 1 5/16" | 7/8" | Partially Threaded | Coarse | 70,000 | 1 | 92185A380 | 00000 | ||
Steel Cup-Tip Set Screws
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Lg. | Drive Size | Hardness | Specs. Met | Pkg. Qty. | Pkg. | |||
|---|---|---|---|---|---|---|---|---|
Black-Oxide Alloy Steel | ||||||||
7/8"-9 | ||||||||
| 7/8" | 1/2" | Rockwell C45 | ASME B18.3, ASTM F912 | 1 | 91375A871 | 00000 | ||
| 1" | 1/2" | Rockwell C45 | ASME B18.3, ASTM F912 | 1 | 91375A872 | 0000 | ||
| 1 1/4" | 1/2" | Rockwell C45 | ASME B18.3, ASTM F912 | 1 | 91375A480 | 00000 | ||
| 1 1/2" | 1/2" | Rockwell C45 | ASME B18.3, ASTM F912 | 1 | 91375A876 | 0000 | ||
| 1 3/4" | 1/2" | Rockwell C45 | ASME B18.3, ASTM F912 | 1 | 91375A481 | 00000 | ||
| 2" | 1/2" | Rockwell C45 | ASME B18.3, ASTM F912 | 1 | 91375A878 | 00000 | ||
| 2 1/2" | 1/2" | Rockwell C45 | ASME B18.3, ASTM F912 | 1 | 91375A880 | 0000 | ||
| 3" | 1/2" | Rockwell C45 | ASME B18.3, ASTM F912 | 1 | 91375A882 | 0000 | ||
| 3 1/2" | 1/2" | Rockwell C45 | ASME B18.3, ASTM F912 | 1 | 91375A486 | 00000 | ||
| 4" | 1/2" | Rockwell C45 | ASME B18.3, ASTM F912 | 1 | 91375A490 | 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 | Each | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Shoulder Lg. | Thread Size | Thread Lg. | Dia. | Ht. | Drive Size | Tensile Strength, psi | Specs. Met | 1-4 | 5-Up | |||
Black-Oxide Alloy Steel | ||||||||||||
1 1/4" Diameter Shoulder (-0.004" to -0.002" Tolerance) | ||||||||||||
| 1 1/2" | 7/8"-9 | 1 1/8" | 1 3/4" | 3/4" | 5/8" | 140,000 | ASME B18.3 | 91259A301 | 000000 | 000000 | ||
| 1 3/4" | 7/8"-9 | 1 1/8" | 1 3/4" | 3/4" | 5/8" | 140,000 | ASME B18.3 | 91259A304 | 00000 | 00000 | ||
| 2" | 7/8"-9 | 1 1/8" | 1 3/4" | 3/4" | 5/8" | 140,000 | ASME B18.3 | 91259A307 | 00000 | 00000 | ||
| 2 1/2" | 7/8"-9 | 1 1/8" | 1 3/4" | 3/4" | 5/8" | 140,000 | ASME B18.3 | 91259A310 | 00000 | 00000 | ||
| 3" | 7/8"-9 | 1 1/8" | 1 3/4" | 3/4" | 5/8" | 140,000 | ASME B18.3 | 91259A313 | 00000 | 00000 | ||
| 3 1/2" | 7/8"-9 | 1 1/8" | 1 3/4" | 3/4" | 5/8" | 140,000 | ASME B18.3 | 91259A316 | 00000 | 00000 | ||
| 4" | 7/8"-9 | 1 1/8" | 1 3/4" | 3/4" | 5/8" | 140,000 | ASME B18.3 | 91259A319 | 00000 | 00000 | ||
| 5" | 7/8"-9 | 1 1/8" | 1 3/4" | 3/4" | 5/8" | 140,000 | ASME B18.3 | 91259A322 | 00000 | 00000 | ||
| 6" | 7/8"-9 | 1 1/8" | 1 3/4" | 3/4" | 5/8" | 140,000 | ASME B18.3 | 91259A323 | 00000 | 00000 | ||
Steel Hollow-Tip Set Screws
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Screw Used to Adjust Spring Tension |
 |
Thread Size | Lg. | Drive Size | Hardness | Pkg. Qty. | Pkg. | |||
|---|---|---|---|---|---|---|---|---|
Black-Oxide Alloy Steel | ||||||||
| 7/8"-9 | 7/16" | 1/2" | Rockwell C45 | 5 | 91301A037 | 000000 | ||
Made-to-Order Same-Size Thread Stainless Steel Hex-Drive Shoulder Screws
 |
Harness superior holding power with custom-shoulder-length screws that also won't rust. These are ideal for replacing fasteners in older machines or for testing prototypes. Threads that match the shoulder diameter give them a tighter hold than screws with a standard thread diameter. Use them in thicker materials and larger holes.
18-8 Stainless Steel—The choice for wet and outdoor environments, these screws won't rust. However, they won't hold up to the harsh chemicals that 316 stainless steel can.
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Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.
Head | Certificate | Each | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Choose a Shoulder Length | Thread Size | Thread Lg. | Dia. | Ht. | Drive Size | Tensile Strength, psi | Type | Form | 1-4 | 5-9 | 10-Up | |||
18-8 Stainless Steel | ||||||||||||||
7/8" Diameter Shoulder (-0.004" to -0.002" Tolerance) | ||||||||||||||
| 0.50" to 1.99" | 7/8"-9 | 1" | 1 5/16" | 5/8" | 1/2" | 70,000 | Material Certificate | Digital | 92183A473 | 000000 | 000000 | 000000 | ||
| 2.00" to 3.99" | 7/8"-9 | 1" | 1 5/16" | 5/8" | 1/2" | 70,000 | Material Certificate | Digital | 92183A483 | 000000 | 00000 | 00000 | ||
Stainless Steel Cup-Tip Set Screws
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.
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 1/4" Diameter Shoulder (-0.004" to -0.002" Tolerance) | ||||||||||||||
| 1" | 7/8"-9 | 1 1/8" | 1 3/4" | 3/4" | 5/8" | 70,000 | ASME B18.3 | Material Certificate | Digital | 8077A269 | 0000000 | 0000000 | ||
| 1 1/4" | 7/8"-9 | 1 1/8" | 1 3/4" | 3/4" | 5/8" | 70,000 | ASME B18.3 | — | — | 8077A279 | 000000 | 000000 | ||
| 1 1/2" | 7/8"-9 | 1 1/8" | 1 3/4" | 3/4" | 5/8" | 70,000 | ASME B18.3 | Material Certificate | Digital | 8077A276 | 000000 | 000000 | ||
| 1 3/4" | 7/8"-9 | 1 1/8" | 1 3/4" | 3/4" | 5/8" | 70,000 | ASME B18.3 | Material Certificate | Digital | 8077A281 | 000000 | 000000 | ||
| 2" | 7/8"-9 | 1 1/8" | 1 3/4" | 3/4" | 5/8" | 70,000 | ASME B18.3 | — | — | 8077A271 | 000000 | 000000 | ||
| 2 1/2" | 7/8"-9 | 1 1/8" | 1 3/4" | 3/4" | 5/8" | 70,000 | ASME B18.3 | Material Certificate | Digital | 8077A277 | 000000 | 000000 | ||
| 3" | 7/8"-9 | 1 1/8" | 1 3/4" | 3/4" | 5/8" | 70,000 | ASME B18.3 | Material Certificate | Digital | 8077A272 | 000000 | 000000 | ||
| 3 1/2" | 7/8"-9 | 1 1/8" | 1 3/4" | 3/4" | 5/8" | 70,000 | ASME B18.3 | Material Certificate | Digital | 8077A278 | 000000 | 000000 | ||
| 4" | 7/8"-9 | 1 1/8" | 1 3/4" | 3/4" | 5/8" | 70,000 | ASME B18.3 | Material Certificate | Digital | 8077A273 | 000000 | 000000 | ||
| 5" | 7/8"-9 | 1 1/8" | 1 3/4" | 3/4" | 5/8" | 70,000 | ASME B18.3 | Material Certificate | Digital | 8077A274 | 000000 | 000000 | ||
| 6" | 7/8"-9 | 1 1/8" | 1 3/4" | 3/4" | 5/8" | 70,000 | ASME B18.3 | Material Certificate | Digital | 8077A275 | 000000 | 000000 | ||
