Clear All
System of Measurement System of Measurement |
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Screw Size Screw Size |
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Head Type Head Type |
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 | Flat |
Drive Style Drive Style |
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 | Square |
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 |
Threading Threading |
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 | Partially Threaded |
Drive Size Drive Size | Show |
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Flat Head Profile Flat Head Profile |
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 | Standard |
Approximate Threads per Inch ApproximateThreads per Inch |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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Hardwood Drill Bit Size Hardwood Drill Bit Size |
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Hardwood Drill Bit Size Decimal Equivalent Hardwood Drill Bit SizeDecimal Equivalent |
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Softwood Drill Bit Size Softwood Drill Bit Size |
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Softwood Drill Bit Size Decimal Equivalent Softwood Drill Bit SizeDecimal Equivalent |
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Tapping Method Tapping Method |
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 | Thread Forming |
About Tapping Screws
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Steel Square-Drive Flat Head Screws for Wood
Beveled under the head for use in countersunk holes, these steel screws 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.
For technical drawings and 3-D models, click on a part number.
Head | |||||||||||
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| 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. 4 | |||||||||||
| 1/2" | 0.225" | 0.067" | No. 0 | 3/64" | 1/16" | 22 | Partially Threaded | 0.33" | 100 | 000000000 | 00000 |
| 3/4" | 0.225" | 0.067" | No. 0 | 3/64" | 1/16" | 22 | Partially Threaded | 0.5" | 100 | 000000000 | 0000 |
| 1" | 0.225" | 0.067" | No. 0 | 3/64" | 1/16" | 22 | Partially Threaded | 0.66" | 100 | 000000000 | 0000 |