About Tapping Screws
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About Hex Head Screws and Bolts
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Steel Phillips Flat Head Screws for Wood
These screws are beveled under the head for use in countersunk holes. 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 the top of the head.
Zinc-plated steel screws resist corrosion in wet environments.
Head | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Dia. | Ht. | Drive Size | Softwood Drill Bit Size | Hardwood Drill Bit Size | Approximate Threads per Inch | Threading | Min. Thread Lg. | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel | |||||||||||
No. 24  | |||||||||||
| 6" | 0.756" | 0.23" | No. 4 | 3/16" | 7/32" | 7 | Partially Threaded | 3" | 5 | 000000000 | 000000 |
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.
Head | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Lg. | Wd. | Ht. | Approximate Threads per Inch | Threading | Minimum Thread Lg. | Specifications Met | Pkg. Qty. | Pkg. | |
Black-Oxide Steel | |||||||||
1/4" | |||||||||
| 6" | 0.438" | 0.172" | 10 | Partially Threaded | 3 1/2" | ASME B18.2.1 | 1 | 000000000 | 00000 |
5/16" | |||||||||
| 6" | 0.5" | 0.219" | 9 | Partially Threaded | 3 1/2" | ASME B18.2.1 | 1 | 000000000 | 0000 |
3/8" | |||||||||
| 6" | 0.563" | 0.25" | 7 | Partially Threaded | 3 1/2" | ASME B18.2.1 | 1 | 000000000 | 0000 |
1/2" | |||||||||
| 6" | 0.75" | 0.344" | 6 | Partially Threaded | 3 1/2" | ASME B18.2.1 | 1 | 000000000 | 0000 |
5/8" | |||||||||
| 6" | 0.938" | 0.422" | 5 | Partially Threaded | 3 1/2" | ASME B18.2.1 | 1 | 000000000 | 00000 |
3/4" | |||||||||
| 6" | 1.125" | 0.5" | 4.5 | Partially Threaded | 3 1/2" | ASME B18.2.1 | 1 | 000000000 | 00000 |
Zinc-Plated Steel | |||||||||
1/4" | |||||||||
| 6" | 0.438" | 0.172" | 10 | Partially Threaded | 3 1/2" | ASME B18.2.1 | 25 | 000000000 | 00000 |
5/16" | |||||||||
| 6" | 0.5" | 0.219" | 9 | Partially Threaded | 3 1/2" | ASME B18.2.1 | 25 | 000000000 | 00000 |
3/8" | |||||||||
| 6" | 0.563" | 0.25" | 7 | Partially Threaded | 3 1/2" | ASME B18.2.1 | 10 | 000000000 | 0000 |
1/2" | |||||||||
| 6" | 0.75" | 0.344" | 6 | Partially Threaded | 3 1/2" | ASME B18.2.1 | 10 | 000000000 | 00000 |
3/4" | |||||||||
| 6" | 1.125" | 0.5" | 4.5 | Partially Threaded | 3 1/2" | ASME B18.2.1 | 1 | 000000000 | 0000 |
Hot-Dipped Galvanized Steel | |||||||||
1/4" | |||||||||
| 6" | 0.438" | 0.172" | 10 | Partially Threaded | 4" | ASME B18.2.1, ASTM A307, SAE J429 | 25 | 000000000 | 00000 |
5/16" | |||||||||
| 6" | 0.5" | 0.219" | 9 | Partially Threaded | 4" | ASME B18.2.1, ASTM A307, SAE J429 | 25 | 000000000 | 00000 |
3/8" | |||||||||
| 6" | 0.563" | 0.25" | 7 | Partially Threaded | 4" | ASME B18.2.1, ASTM A307, SAE J429 | 10 | 000000000 | 00000 |
1/2" | |||||||||
| 6" | 0.75" | 0.344" | 6 | Partially Threaded | 4" | ASME B18.2.1, ASTM A307, SAE J429 | 5 | 000000000 | 00000 |
5/8" | |||||||||
| 6" | 0.938" | 0.422" | 5 | Partially Threaded | 4" | ASME B18.2.1, ASTM A307, SAE J429 | 1 | 000000000 | 0000 |
3/4" | |||||||||
| 6" | 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.
Head | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Lg. | Wd. | Ht. | Approximate Threads per Inch | Threading | Minimum Thread Lg. | Specifications Met | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | |||||||||
1/4" | |||||||||
| 6" | 0.438" | 0.172" | 10 | Partially Threaded | 3 1/2" | ASME B18.2.1 | 10 | 000000000 | 000000 |
5/16" | |||||||||
| 6" | 0.5" | 0.219" | 9 | Partially Threaded | 3 1/2" | ASME B18.2.1 | 5 | 000000000 | 0000 |
3/8" | |||||||||
| 6" | 0.563" | 0.25" | 7 | Partially Threaded | 3 1/2" | ASME B18.2.1 | 5 | 000000000 | 00000 |
1/2" | |||||||||
| 6" | 0.75" | 0.344" | 6 | Partially Threaded | 3 1/2" | ASME B18.2.1 | 1 | 000000000 | 0000 |
5/8" | |||||||||
| 6" | 0.938" | 0.422" | 5 | Partially Threaded | 4" | ASME B18.2.1 | 1 | 000000000 | 00000 |
3/4" | |||||||||
| 6" | 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.
Head | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Lg. | Wd. | Ht. | Approximate Threads per Inch | Threading | Minimum Thread Lg. | Specifications Met | Pkg. Qty. | Pkg. | |
316 Stainless Steel | |||||||||
1/4" | |||||||||
| 6" | 0.438" | 0.172" | 10 | Partially Threaded | 4" | ASME B18.2.1 | 1 | 000000000 | 00000 |
5/16" | |||||||||
| 6" | 0.5" | 0.219" | 9 | Partially Threaded | 4" | ASME B18.2.1 | 1 | 000000000 | 0000 |
3/8" | |||||||||
| 6" | 0.563" | 0.25" | 7 | Partially Threaded | 4" | ASME B18.2.1 | 1 | 000000000 | 0000 |
1/2" | |||||||||
| 6" | 0.75" | 0.344" | 6 | Partially Threaded | 4" | ASME B18.2.1 | 1 | 000000000 | 0000 |
5/8" | |||||||||
| 6" | 0.938" | 0.422" | 5 | Partially Threaded | 4" | ASME B18.2.1 | 1 | 000000000 | 00000 |
3/4" | |||||||||
| 6" | 1.125" | 0.5" | 4.5 | Partially Threaded | 4" | ASME B18.2.1 | 1 | 000000000 | 00000 |
Steel Flanged Hex Head Screws for Wood
These steel screws are hot-dipped galvanized to resist corrosion in wet environments and are a good choice for ACQ-treated (arsenic-free) lumber. The flange reduces the risk of crushing material and the hex head provides 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. Head height includes the flange. Length is measured from under the head.
Head | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Wd. | Ht. | Flange Dia. | Approximate Threads per Inch | Threading | Minimum Thread Lg. | Specifications Met | Pkg. Qty. | Pkg. | |
Hot-Dipped Galvanized Steel | ||||||||||
3/8" | ||||||||||
| 6" | 0.563" | 0.39" | 0.81" | 7 | Partially Threaded | 3 1/2" | ASTM A153 | 5 | 000000000 | 000000 |
Stainless Steel Flanged Hex Head Screws for Wood
These 316 stainless steel screws have excellent resistance to chemicals and salt water and are a good choice for ACQ-treated (arsenic-free) lumber. The flange reduces the risk of crushing material and the hex head provides 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. Screws may be mildly magnetic. Head height includes the flange. Length is measured from under the head.
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.
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.
Head | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Dia. | Ht. | Drive Size | Drill Bit Size | Approximate Threads per Inch | Threading | Min. Thread Lg. | Pkg. Qty. | Pkg. | |
316 Stainless Steel | ||||||||||
No. 14 | ||||||||||
| 6" | 0.43" | 1/4" | No. 3 | 7/64" | 10 | Partially Threaded | 4" | 5 | 000000000 | 00000 |
Phillips Screws for Softwood and Plastic-Wood Composites
A curved neck sinks into material, so these screws sit flush with the surface. Also known as deck screws, they have a sharp point and narrow body to penetrate softwood and plastic-wood composite decking material. They're made from hardened steel and have a corrosion-resistant coating that resists at least 500 hours of salt spray. Length is measured from the top of the head.
Head | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Dia. | Ht. | Drive Size | Drill Bit Size | Approximate Threads per Inch | Threading | Min. Thread Lg. | Pkg. Qty. | Pkg. | |
Corrosion-Resistant-Coated Steel | ||||||||||
No. 10 | ||||||||||
| 6" | 0.342" | 3/16" | No. 2 | 5/64" | 9 | Partially Threaded | 1.65" | 30 | 000000000 | 000000 |
Screws for Joining Drywall to Wood
Hang drywall to wood framing. These screws have a sharp point that penetrates drywall and a curved neck that sinks in without tearing the paper surface. Length is measured from the top of the head.
Zinc-plated and zinc yellow-chromate plated steel screws are corrosion resistant in wet environments.
Head | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Lg. | Dia. | Ht. | Drive Size | Approximate Threads per Inch | Threading | Min. Thread Lg. | Pkg. Qty. | Pkg. | |
Zinc Yellow-Chromate-Plated Steel | |||||||||
No. 10 | |||||||||
| 6" | 0.363" | 0.039" | No. 2 | 9 | Partially Threaded | 2 1/2" | 25 | 000000000 | 000000 |
Wood Screw-Style Hangers
Drive these hangers into wood with an adjustable wrench, pliers, or a special driver bit (sold separately). They’re also known as eye lags.
Zinc- and zinc yellow-chromate plated steel hangers are corrosion resistant in wet environments.