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For Use In
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DFARS Specialty Metals
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Hardwood Drill Bit Size Decimal Equivalent
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Softwood Drill Bit Size
Softwood Drill Bit Size Decimal Equivalent
Threading
Steel Square-Drive Flat Head Wood Screws
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Avoid slipping when using a lot of torque. These square-drive screws withstand more torque than slotted and Phillips drives. Also known as Robertson-drive screws. The flat head on these screws sits flush, so you won't need to worry about snags.
Drill a pilot hole slightly smaller than the screw to prevent splitting. Length is measured from the top of the head.
Zinc-Plated Steel—A common choice for areas with occasional exposure to moisture.
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Lg. | Dia. | Ht. | Softwood Drill Bit Size | Hardwood Drill Bit Size | Countersink Angle | Flat Head Profile | Approx. Threads per In. | Threading | Tapping Method | Pkg. Qty. | Pkg. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Zinc-Plated Steel | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
No. 4 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 1/2" | 0.225" | 0.067" | 3/64" | 1/16" | 82° | Standard | 22 | Partially Threaded | Thread Forming | 100 | 000000000 | 00000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 3/4" | 0.225" | 0.067" | 3/64" | 1/16" | 82° | Standard | 22 | Partially Threaded | Thread Forming | 100 | 000000000 | 0000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 1" | 0.225" | 0.067" | 3/64" | 1/16" | 82° | Standard | 22 | Partially Threaded | Thread Forming | 100 | 000000000 | 0000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
