System of Measurement System of Measurement |
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Screw Size Screw Size | Show |
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Finish Finish |
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Material Material |
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Head Type Head Type |
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 | Hex |
Threading Threading |
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 | Partially Threaded |
Approximate Threads per Inch ApproximateThreads per Inch |
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Anchor Type Anchor Type |
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 | Female Threaded |
Pull-Out Strength Pull-Out Strength |
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Thread Size Thread Size |
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Thread Type Thread Type |
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Diameter Diameter |
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Drill Bit Size Drill Bit Size |
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Shear Strength Shear Strength |
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Thread Fit Thread Fit |
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Drill Bit Decimal Size Equivalent Drill Bit DecimalSize Equivalent |
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About Tapping Screws
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 | |||||||||
3/4" | |||||||||
| 2 1/2" | 1.125" | 0.5" | 4.5 | Partially Threaded | 1.667" | ASME B18.2.1 | 1 | 000000000 | 000000 |
| 3" | 1.125" | 0.5" | 4.5 | Partially Threaded | 2" | ASME B18.2.1 | 1 | 000000000 | 0000 |
| 3 1/2" | 1.125" | 0.5" | 4.5 | Partially Threaded | 2.333" | ASME B18.2.1 | 1 | 000000000 | 0000 |
| 4" | 1.125" | 0.5" | 4.5 | Partially Threaded | 2.667" | ASME B18.2.1 | 1 | 000000000 | 0000 |
| 4 1/2" | 1.125" | 0.5" | 4.5 | Partially Threaded | 3" | ASME B18.2.1 | 1 | 000000000 | 0000 |
| 5" | 1.125" | 0.5" | 4.5 | Partially Threaded | 3.333" | ASME B18.2.1 | 1 | 000000000 | 00000 |
| 6" | 1.125" | 0.5" | 4.5 | Partially Threaded | 4" | ASME B18.2.1 | 1 | 000000000 | 00000 |
| 8" | 1.125" | 0.5" | 4.5 | Partially Threaded | 4" | ASME B18.2.1 | 1 | 000000000 | 00000 |
| 10" | 1.125" | 0.5" | 4.5 | Partially Threaded | 5" | ASME B18.2.1 | 1 | 000000000 | 00000 |
| 12" | 1.125" | 0.5" | 4.5 | Partially Threaded | 5" | ASME B18.2.1 | 1 | 000000000 | 00000 |
Zinc-Plated Steel | |||||||||
3/4" | |||||||||
| 3" | 1.125" | 0.5" | 4.5 | Partially Threaded | 2" | ASME B18.2.1 | 5 | 000000000 | 00000 |
| 4" | 1.125" | 0.5" | 4.5 | Partially Threaded | 2.667" | ASME B18.2.1 | 5 | 000000000 | 00000 |
| 5" | 1.125" | 0.5" | 4.5 | Partially Threaded | 3.333" | ASME B18.2.1 | 5 | 000000000 | 00000 |
| 6" | 1.125" | 0.5" | 4.5 | Partially Threaded | 4" | ASME B18.2.1 | 1 | 000000000 | 0000 |
Hot-Dipped Galvanized Steel | |||||||||
3/4" | |||||||||
| 4" | 1.125" | 0.5" | 4.5 | Partially Threaded | 2.667" | ASME B18.2.1, ASTM A307, SAE J429 | 1 | 000000000 | 0000 |
| 5" | 1.125" | 0.5" | 4.5 | Partially Threaded | 3.333" | ASME B18.2.1, ASTM A307, SAE J429 | 1 | 000000000 | 0000 |
| 6" | 1.125" | 0.5" | 4.5 | Partially Threaded | 4" | ASME B18.2.1, ASTM A307, SAE J429 | 1 | 000000000 | 0000 |
| 7" | 1.125" | 0.5" | 4.5 | Partially Threaded | 4.667" | ASME B18.2.1, ASTM A307, SAE J429 | 1 | 000000000 | 0000 |
| 8" | 1.125" | 0.5" | 4.5 | Partially Threaded | 5.333" | ASME B18.2.1, ASTM A307, SAE J429 | 1 | 000000000 | 0000 |
| 10" | 1.125" | 0.5" | 4.5 | Partially Threaded | 4" | ASME B18.2.1, ASTM A307, SAE J429 | 1 | 000000000 | 0000 |
| 12" | 1.125" | 0.5" | 4.5 | Partially Threaded | 4" | ASME B18.2.1, ASTM A307, SAE J429 | 1 | 000000000 | 0000 |
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 | |||||||||
3/4" | |||||||||
| 3" | 1.125" | 0.5" | 4.5 | Partially Threaded | 2" | ASME B18.2.1 | 1 | 000000000 | 000000 |
| 4" | 1.125" | 0.5" | 4.5 | Partially Threaded | 2.667" | ASME B18.2.1 | 1 | 000000000 | 00000 |
| 5" | 1.125" | 0.5" | 4.5 | Partially Threaded | 3.333" | ASME B18.2.1 | 1 | 000000000 | 00000 |
| 6" | 1.125" | 0.5" | 4.5 | Partially Threaded | 4" | ASME B18.2.1 | 1 | 000000000 | 00000 |
| 7" | 1.125" | 0.5" | 4.5 | Partially Threaded | 4.667" | ASME B18.2.1 | 1 | 000000000 | 00000 |
| 8" | 1.125" | 0.5" | 4.5 | Partially Threaded | 5.333" | ASME B18.2.1 | 1 | 000000000 | 00000 |
| 10" | 1.125" | 0.5" | 4.5 | Partially Threaded | 4" | ASME B18.2.1 | 1 | 000000000 | 00000 |
| 12" | 1.125" | 0.5" | 4.5 | Partially Threaded | 4" | ASME B18.2.1 | 1 | 000000000 | 00000 |
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 | |||||||||
3/4" | |||||||||
| 4" | 1.125" | 0.5" | 4.5 | Partially Threaded | 2.667" | ASME B18.2.1 | 1 | 000000000 | 000000 |
| 5" | 1.125" | 0.5" | 4.5 | Partially Threaded | 3.333" | ASME B18.2.1 | 1 | 000000000 | 00000 |
| 6" | 1.125" | 0.5" | 4.5 | Partially Threaded | 4" | ASME B18.2.1 | 1 | 000000000 | 00000 |
| 7" | 1.125" | 0.5" | 4.5 | Partially Threaded | 4.667" | ASME B18.2.1 | 1 | 000000000 | 00000 |
| 8" | 1.125" | 0.5" | 4.5 | Partially Threaded | 5.333" | ASME B18.2.1 | 1 | 000000000 | 00000 |
| 10" | 1.125" | 0.5" | 4.5 | Partially Threaded | 4" | ASME B18.2.1 | 1 | 000000000 | 00000 |
| 12" | 1.125" | 0.5" | 4.5 | Partially Threaded | 4" | ASME B18.2.1 | 1 | 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 | |||||||||||
| 3/4"-10 | 3 1/8" | 1 1/4" | 3 1/8" | 1 1/4" | 2,400 | 3,800 | 4,000 psi Concrete | Block, Brick, Concrete, Stone | 1 | 000000000 | 00000 |
Female-Threaded Anchors for Block and Brick
Also known as double expansion anchors, these expand from both sides for full contact and a secure hold. To install, tap into a drilled hole with a hammer and position your fixture. Then, insert a screw or threaded rod and tighten. For maximum expansion, the anchor should protrude slightly above the surface before threading the screw. 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 | |||||||||||
| 3/4"-10 | 3 15/16" | 1 1/4" | 3 1/2" | 1 1/4" | 2,000 | 3,300 | 4,000 psi Concrete | Block, Brick, Concrete | 1 | 000000000 | 00000 |