System of Measurement System of Measurement |
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Screw Size Screw Size | Show |
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Material Material |
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Threading Threading |
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 | Partially Threaded |
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Minimum Thread Length Minimum Thread Length |
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Approximate Threads per Inch ApproximateThreads per Inch |
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Thread Size Thread Size |
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Thread Type Thread Type |
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Pull-Out Strength Pull-Out Strength |
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Shear Strength Shear Strength |
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Minimum Installation Depth Minimum Installation Depth |
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Diameter Diameter |
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Drill Bit Decimal Size Equivalent Drill Bit DecimalSize Equivalent |
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Drill Bit Size Drill Bit Size |
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About Tapping Screws
More
About Threaded Studs and Rods
More
Steel Hex Head Screws for Wood
These steel screws have corrosion-resistant finishes. Also known as lag bolts, they have a hex head for a secure grip with a wrench. They press threads into material for a tight, secure hold. To prevent splitting, drill a pilot hole slightly smaller than the screw. Length is measured from under the head.
Black-oxide steel screws have a coating that protects the steel from rusting in dry environments and blends in with dark surfaces.
Zinc-plated steel screws resist corrosion in wet environments.
Hot-dipped galvanized steel screws have a thick coating for better corrosion resistance than zinc-plated steel screws. They're a good choice for ACQ-treated (arsenic-free) lumber.
For technical drawings and 3-D models, click on a part number.
Head | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Lg. | Wd. | Ht. | Approximate Threads per Inch | Threading | Minimum Thread Lg. | Specifications Met | Pkg. Qty. | Pkg. | |
Black-Oxide Steel | |||||||||
5/16" | |||||||||
| 1" | 0.5" | 0.219" | 9 | Partially Threaded | 0.667" | ASME B18.2.1 | 10 | 000000000 | 00000 |
| 1 1/4" | 0.5" | 0.219" | 9 | Partially Threaded | 0.833" | ASME B18.2.1 | 10 | 000000000 | 0000 |
| 1 1/2" | 0.5" | 0.219" | 9 | Partially Threaded | 1" | ASME B18.2.1 | 10 | 000000000 | 0000 |
| 1 3/4" | 0.5" | 0.219" | 9 | Partially Threaded | 1.167" | ASME B18.2.1 | 10 | 000000000 | 0000 |
| 2" | 0.5" | 0.219" | 9 | Partially Threaded | 1.333" | ASME B18.2.1 | 5 | 000000000 | 0000 |
| 2 1/2" | 0.5" | 0.219" | 9 | Partially Threaded | 1.667" | ASME B18.2.1 | 5 | 000000000 | 0000 |
| 3" | 0.5" | 0.219" | 9 | Partially Threaded | 2" | ASME B18.2.1 | 5 | 000000000 | 0000 |
| 3 1/2" | 0.5" | 0.219" | 9 | Partially Threaded | 2.333" | ASME B18.2.1 | 5 | 000000000 | 0000 |
| 4" | 0.5" | 0.219" | 9 | Partially Threaded | 2.667" | ASME B18.2.1 | 1 | 000000000 | 0000 |
| 4 1/2" | 0.5" | 0.219" | 9 | Partially Threaded | 3" | ASME B18.2.1 | 1 | 000000000 | 0000 |
| 5" | 0.5" | 0.219" | 9 | Partially Threaded | 3.333" | ASME B18.2.1 | 1 | 000000000 | 0000 |
| 5 1/2" | 0.5" | 0.219" | 9 | Partially Threaded | 3.25" | ASME B18.2.1 | 1 | 000000000 | 0000 |
| 6" | 0.5" | 0.219" | 9 | Partially Threaded | 4" | ASME B18.2.1 | 1 | 000000000 | 0000 |
Zinc-Plated Steel | |||||||||
5/16" | |||||||||
| 1" | 0.5" | 0.219" | 9 | Partially Threaded | 0.667" | ASME B18.2.1 | 100 | 000000000 | 00000 |
| 1 1/4" | 0.5" | 0.219" | 9 | Partially Threaded | 0.833" | ASME B18.2.1 | 100 | 000000000 | 00000 |
| 1 1/2" | 0.5" | 0.219" | 9 | Partially Threaded | 1" | ASME B18.2.1 | 100 | 000000000 | 00000 |
| 1 3/4" | 0.5" | 0.219" | 9 | Partially Threaded | 1.167" | ASME B18.2.1 | 50 | 000000000 | 0000 |
| 2" | 0.5" | 0.219" | 9 | Partially Threaded | 1.333" | ASME B18.2.1 | 50 | 000000000 | 0000 |
| 2 1/2" | 0.5" | 0.219" | 9 | Partially Threaded | 1.667" | ASME B18.2.1 | 50 | 000000000 | 00000 |
| 3" | 0.5" | 0.219" | 9 | Partially Threaded | 2" | ASME B18.2.1 | 50 | 000000000 | 00000 |
| 3 1/2" | 0.5" | 0.219" | 9 | Partially Threaded | 2.333" | ASME B18.2.1 | 50 | 000000000 | 00000 |
| 4" | 0.5" | 0.219" | 9 | Partially Threaded | 2.667" | ASME B18.2.1 | 25 | 000000000 | 0000 |
| 5" | 0.5" | 0.219" | 9 | Partially Threaded | 3.333" | ASME B18.2.1 | 25 | 000000000 | 00000 |
| 6" | 0.5" | 0.219" | 9 | Partially Threaded | 4" | ASME B18.2.1 | 25 | 000000000 | 00000 |
Black Zinc-Plated Steel | |||||||||
5/16" | |||||||||
| 1 1/2" | 0.5" | 0.219" | 9 | Partially Threaded | 1" | ASME B18.2.1 | 50 | 000000000 | 00000 |
| 2" | 0.5" | 0.219" | 9 | Partially Threaded | 1.333" | ASME B18.2.1 | 50 | 000000000 | 00000 |
| 2 1/2" | 0.5" | 0.219" | 9 | Partially Threaded | 1.667" | ASME B18.2.1 | 50 | 000000000 | 00000 |
| 3" | 0.5" | 0.219" | 9 | Partially Threaded | 2" | ASME B18.2.1 | 25 | 000000000 | 0000 |
Hot-Dipped Galvanized Steel | |||||||||
5/16" | |||||||||
| 1" | 0.5" | 0.219" | 9 | Partially Threaded | 0.667" | ASME B18.2.1, ASTM A307, SAE J429 | 50 | 000000000 | 00000 |
| 1 1/4" | 0.5" | 0.219" | 9 | Partially Threaded | 0.833" | ASME B18.2.1, ASTM A307, SAE J429 | 50 | 000000000 | 00000 |
| 1 1/2" | 0.5" | 0.219" | 9 | Partially Threaded | 1" | ASME B18.2.1, ASTM A307, SAE J429 | 50 | 000000000 | 00000 |
| 2" | 0.5" | 0.219" | 9 | Partially Threaded | 1.333" | ASME B18.2.1, ASTM A307, SAE J429 | 50 | 000000000 | 00000 |
| 2 1/2" | 0.5" | 0.219" | 9 | Partially Threaded | 1.667" | ASME B18.2.1, ASTM A307, SAE J429 | 50 | 000000000 | 00000 |
| 3" | 0.5" | 0.219" | 9 | Partially Threaded | 2" | ASME B18.2.1, ASTM A307, SAE J429 | 50 | 000000000 | 00000 |
| 3 1/2" | 0.5" | 0.219" | 9 | Partially Threaded | 2.333" | ASME B18.2.1, ASTM A307, SAE J429 | 25 | 000000000 | 00000 |
| 4" | 0.5" | 0.219" | 9 | Partially Threaded | 2.667" | ASME B18.2.1, ASTM A307, SAE J429 | 25 | 000000000 | 00000 |
| 4 1/2" | 0.5" | 0.219" | 9 | Partially Threaded | 3" | ASME B18.2.1, ASTM A307, SAE J429 | 25 | 000000000 | 0000 |
| 5" | 0.5" | 0.219" | 9 | Partially Threaded | 3.333" | ASME B18.2.1, ASTM A307, SAE J429 | 25 | 000000000 | 00000 |
| 6" | 0.5" | 0.219" | 9 | Partially Threaded | 4" | ASME B18.2.1, ASTM A307, SAE J429 | 25 | 000000000 | 00000 |
18-8 Stainless Steel Hex Head Screws for Wood
18-8 stainless steel screws have good chemical resistance and are a good choice for ACQ-treated (arsenic-free) lumber. Also known as lag bolts, they have a hex head for a secure grip with a wrench. They press threads into material for a tight, secure hold. To prevent splitting, drill a pilot hole slightly smaller than the screw. They may be mildly magnetic. Length is measured from under the head.
For technical drawings and 3-D models, click on a part number.
Head | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Lg. | Wd. | Ht. | Approximate Threads per Inch | Threading | Minimum Thread Lg. | Specifications Met | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | |||||||||
5/16" | |||||||||
| 1" | 0.5" | 0.219" | 9 | Partially Threaded | 0.667" | ASME B18.2.1 | 25 | 000000000 | 00000 |
| 1 1/4" | 0.5" | 0.219" | 9 | Partially Threaded | 0.833" | ASME B18.2.1 | 25 | 000000000 | 0000 |
| 1 1/2" | 0.5" | 0.219" | 9 | Partially Threaded | 1" | ASME B18.2.1 | 25 | 000000000 | 0000 |
| 1 3/4" | 0.5" | 0.219" | 9 | Partially Threaded | 1.167" | ASME B18.2.1 | 10 | 000000000 | 0000 |
| 2" | 0.5" | 0.219" | 9 | Partially Threaded | 1.333" | ASME B18.2.1 | 10 | 000000000 | 0000 |
| 2 1/2" | 0.5" | 0.219" | 9 | Partially Threaded | 1.667" | ASME B18.2.1 | 10 | 000000000 | 0000 |
| 3" | 0.5" | 0.219" | 9 | Partially Threaded | 2" | ASME B18.2.1 | 10 | 000000000 | 0000 |
| 3 1/2" | 0.5" | 0.219" | 9 | Partially Threaded | 2.333" | ASME B18.2.1 | 10 | 000000000 | 0000 |
| 4" | 0.5" | 0.219" | 9 | Partially Threaded | 2.667" | ASME B18.2.1 | 10 | 000000000 | 0000 |
| 4 1/2" | 0.5" | 0.219" | 9 | Partially Threaded | 3" | ASME B18.2.1 | 10 | 000000000 | 0000 |
| 5" | 0.5" | 0.219" | 9 | Partially Threaded | 3.333" | ASME B18.2.1 | 5 | 000000000 | 0000 |
| 6" | 0.5" | 0.219" | 9 | Partially Threaded | 4" | ASME B18.2.1 | 5 | 000000000 | 0000 |
Super-Corrosion-Resistant 316 Stainless
Steel Hex Head Screws for Wood
More corrosion resistant than 18-8 stainless steel screws, these have excellent resistance to chemicals and salt water and are a good choice for ACQ-treated (arsenic-free) lumber. Also known as lag bolts, they have a hex head for a secure grip with a wrench. They press threads into material for a tight, secure hold. To prevent splitting, drill a pilot hole slightly smaller than the screw. They may be mildly magnetic. Length is measured from under the head.
For technical drawings and 3-D models, click on a part number.
Head | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Lg. | Wd. | Ht. | Approximate Threads per Inch | Threading | Minimum Thread Lg. | Specifications Met | Pkg. Qty. | Pkg. | |
316 Stainless Steel | |||||||||
5/16" | |||||||||
| 1" | 0.5" | 0.219" | 9 | Partially Threaded | 0.667" | ASME B18.2.1 | 10 | 000000000 | 00000 |
| 1 1/4" | 0.5" | 0.219" | 9 | Partially Threaded | 0.833" | ASME B18.2.1 | 10 | 000000000 | 0000 |
| 1 1/2" | 0.5" | 0.219" | 9 | Partially Threaded | 1" | ASME B18.2.1 | 10 | 000000000 | 0000 |
| 2" | 0.5" | 0.219" | 9 | Partially Threaded | 1.333" | ASME B18.2.1 | 10 | 000000000 | 00000 |
| 2 1/2" | 0.5" | 0.219" | 9 | Partially Threaded | 1.667" | ASME B18.2.1 | 5 | 000000000 | 0000 |
| 3" | 0.5" | 0.219" | 9 | Partially Threaded | 2" | ASME B18.2.1 | 5 | 000000000 | 0000 |
| 3 1/2" | 0.5" | 0.219" | 9 | Partially Threaded | 2.333" | ASME B18.2.1 | 5 | 000000000 | 0000 |
| 4" | 0.5" | 0.219" | 9 | Partially Threaded | 2.667" | ASME B18.2.1 | 5 | 000000000 | 0000 |
| 4 1/2" | 0.5" | 0.219" | 9 | Partially Threaded | 3" | ASME B18.2.1 | 1 | 000000000 | 0000 |
| 5" | 0.5" | 0.219" | 9 | Partially Threaded | 3.333" | ASME B18.2.1 | 1 | 000000000 | 0000 |
| 6" | 0.5" | 0.219" | 9 | Partially Threaded | 4" | ASME B18.2.1 | 1 | 000000000 | 0000 |
Steel Wood Screw Threaded Studs
These studs are also known as hanger bolts—use them to hang, mount, and fasten parts to wood structures. Install with a stud driver or create wrench flats by threading two nuts onto the stud and jamming them together.
Black-oxide steel studs are mildly corrosion resistant in dry environments.
For technical drawings and 3-D models, click on a part number.
Stainless Steel Wood Screw Threaded Studs
18-8 stainless steel studs have good chemical resistance and may be mildly magnetic. Also known as hanger bolts, use them to hang, mount, and fasten parts to wood structures. Install with a stud driver or create wrench flats by threading two nuts onto the stud and jamming them together.
For technical drawings and 3-D models, click on a part number.
(A) | (B) | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Screw Size | Thread Lg. | Thread Size | Thread Lg. | Lg. | Tensile Strength | Hardness | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | |||||||||
| 5/16" | 7/8" | 5/16"-18 | 5/8" | 1 1/2" | Not Rated | Not Rated | 10 | 000000000 | 00000 |
| 5/16" | 1" | 5/16"-18 | 1" | 2" | Not Rated | Not Rated | 10 | 000000000 | 00000 |
| 5/16" | 1 1/2" | 5/16"-18 | 1" | 2 1/2" | Not Rated | Not Rated | 10 | 000000000 | 00000 |
| 5/16" | 1 1/2" | 5/16"-18 | 1 1/2" | 3" | Not Rated | Not Rated | 10 | 000000000 | 00000 |
| 5/16" | 2" | 5/16"-18 | 1 1/2" | 3 1/2" | Not Rated | Not Rated | 10 | 000000000 | 00000 |
| 5/16" | 2" | 5/16"-18 | 2" | 4" | Not Rated | Not Rated | 5 | 000000000 | 0000 |
| 5/16" | 3" | 5/16"-18 | 1 1/4" | 5" | Not Rated | Not Rated | 5 | 000000000 | 00000 |
| 5/16" | 3" | 5/16"-18 | 1 1/2" | 6" | Not Rated | Not Rated | 5 | 000000000 | 00000 |
Vibration-Resistant Female-Threaded
Anchors for Block and Brick
Often referred to as four-way expansion anchors, these expand in four directions to resist loosening from vibration. To install, tap into a drilled hole with a hammer and position your fixture. Then, insert a screw or threaded rod and tighten. Pull-out strength and shear strength values are 25% of the ultimate values.
For technical drawings and 3-D models, click on a part number.
Strength, lbs. | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Thread Size | Lg. | Drill Bit Size | Min. Installation Dp. | Dia. | Pull-Out | Shear | Tested In | For Use In | Pkg. Qty. | Pkg. | |
Zinc Alloy | |||||||||||
| 5/16"-18 | 1 1/2" | 9/16" | 1 1/2" | 9/16" | 650 | 820 | 4,000 psi Concrete | Block, Brick, Concrete, Stone | 10 | 000000000 | 000000 |