System of Measurement System of Measurement |
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Length Length | Show |
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Length Length | Hide |
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Material Material |
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Finish Finish |
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For Use In For Use In |
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Tip Type Tip Type |
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 | Pointed |
Drive Style Drive Style |
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| Square | External Hex |
Threading Threading |
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 | Partially Threaded |
 | Threaded on Both Ends |
Tapping Screw Type Tapping Screw Type |
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 | 17 |
Tapping Method Tapping Method |
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| Thread Forming | Thread Cutting |
Drive Size Drive Size |
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Drill Bit Size Drill Bit Size |
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Drill Bit Decimal Size Equivalent Drill Bit DecimalSize Equivalent |
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Flat Head Profile Flat Head Profile |
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 | Standard |
Thread Size Thread 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 | |||||||||
1/4" | |||||||||
| 4 1/2" | 0.438" | 0.172" | 10 | Partially Threaded | 3" | ASME B18.2.1 | 5 | 000000000 | 00000 |
5/16" | |||||||||
| 4 1/2" | 0.5" | 0.219" | 9 | Partially Threaded | 3" | ASME B18.2.1 | 1 | 000000000 | 0000 |
3/8" | |||||||||
| 4 1/2" | 0.563" | 0.25" | 7 | Partially Threaded | 3" | ASME B18.2.1 | 1 | 000000000 | 0000 |
1/2" | |||||||||
| 4 1/2" | 0.75" | 0.344" | 6 | Partially Threaded | 3" | ASME B18.2.1 | 1 | 000000000 | 0000 |
5/8" | |||||||||
| 4 1/2" | 0.938" | 0.422" | 5 | Partially Threaded | 3" | ASME B18.2.1 | 1 | 000000000 | 0000 |
3/4" | |||||||||
| 4 1/2" | 1.125" | 0.5" | 4.5 | Partially Threaded | 3" | ASME B18.2.1 | 1 | 000000000 | 0000 |
Zinc-Plated Steel | |||||||||
3/8" | |||||||||
| 4 1/2" | 0.563" | 0.25" | 7 | Partially Threaded | 3" | ASME B18.2.1 | 25 | 000000000 | 00000 |
1/2" | |||||||||
| 4 1/2" | 0.75" | 0.344" | 6 | Partially Threaded | 3" | ASME B18.2.1 | 10 | 000000000 | 00000 |
Hot-Dipped Galvanized Steel | |||||||||
1/4" | |||||||||
| 4 1/2" | 0.438" | 0.172" | 10 | Partially Threaded | 3" | ASME B18.2.1, ASTM A307, SAE J429 | 25 | 000000000 | 0000 |
5/16" | |||||||||
| 4 1/2" | 0.5" | 0.219" | 9 | Partially Threaded | 3" | ASME B18.2.1, ASTM A307, SAE J429 | 25 | 000000000 | 0000 |
3/8" | |||||||||
| 4 1/2" | 0.563" | 0.25" | 7 | Partially Threaded | 3" | ASME B18.2.1, ASTM A307, SAE J429 | 10 | 000000000 | 0000 |
1/2" | |||||||||
| 4 1/2" | 0.75" | 0.344" | 6 | Partially Threaded | 3" | ASME B18.2.1, ASTM A307, SAE J429 | 10 | 000000000 | 00000 |
5/8" | |||||||||
| 4 1/2" | 0.938" | 0.422" | 5 | Partially Threaded | 3" | ASME B18.2.1, ASTM A307, SAE J429 | 5 | 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 | |||||||||
1/4" | |||||||||
| 4 1/2" | 0.438" | 0.172" | 10 | Partially Threaded | 3" | ASME B18.2.1 | 10 | 000000000 | 00000 |
5/16" | |||||||||
| 4 1/2" | 0.5" | 0.219" | 9 | Partially Threaded | 3" | ASME B18.2.1 | 10 | 000000000 | 0000 |
3/8" | |||||||||
| 4 1/2" | 0.563" | 0.25" | 7 | Partially Threaded | 3" | ASME B18.2.1 | 5 | 000000000 | 0000 |
1/2" | |||||||||
| 4 1/2" | 0.75" | 0.344" | 6 | Partially Threaded | 3" | ASME B18.2.1 | 1 | 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 | |||||||||
1/4" | |||||||||
| 4 1/2" | 0.438" | 0.172" | 10 | Partially Threaded | 3" | ASME B18.2.1 | 5 | 000000000 | 00000 |
5/16" | |||||||||
| 4 1/2" | 0.5" | 0.219" | 9 | Partially Threaded | 3" | ASME B18.2.1 | 1 | 000000000 | 0000 |
3/8" | |||||||||
| 4 1/2" | 0.563" | 0.25" | 7 | Partially Threaded | 3" | ASME B18.2.1 | 1 | 000000000 | 0000 |
1/2" | |||||||||
| 4 1/2" | 0.75" | 0.344" | 6 | Partially Threaded | 3" | ASME B18.2.1 | 1 | 000000000 | 0000 |
18-8 Stainless Steel Square-Drive Screws
for Softwood and Plastic-Wood Composites
18-8 stainless steel screws have good chemical resistance and are a good choice for ACQ-treated (arsenic-free) lumber. They have a curved neck that sinks into material, so they sit flush with the surface. Also known as deck screws, they have a Type 17 auger point that penetrates softwood and plastic-wood composite decking material. They may be mildly magnetic. Length is measured from the top of the head.
For technical drawings and 3-D models, click on a part number.
Head | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Dia. | Ht. | Drive Size | Drill Bit Size | Approximate Threads per Inch | Threading | Min. Thread Lg. | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | ||||||||||
No. 12 | ||||||||||
| 4 1/2" | 0.43" | 0.203" | No. 3 | 7/64" | 11 | Partially Threaded | 2.97" | 10 | 000000000 | 00000 |
Super-Corrosion-Resistant 316
Stainless Steel Square-Drive Screws for
Softwood and Plastic-Wood Composites
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. They have a curved neck that sinks into material, so they sit flush with the surface. Also known as deck screws, they have a Type 17 auger point that penetrates softwood and plastic-wood composite decking material. They may be mildly magnetic. Length is measured from the top of the head.
For technical drawings and 3-D models, click on a part number.
Head | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Dia. | Ht. | Drive Size | Drill Bit Size | Approximate Threads per Inch | Threading | Min. Thread Lg. | Pkg. Qty. | Pkg. | |
316 Stainless Steel | ||||||||||
No. 12 | ||||||||||
| 4 1/2" | 0.43" | 0.203" | No. 3 | 7/64" | 11 | Partially Threaded | 2.97" | 10 | 000000000 | 00000 |
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 | |||||||||
| 1/4" | 3" | 1/4"-20 | 1 1/2" | 4 1/2" | Not Rated | Not Rated | 10 | 000000000 | 000000 |