Simpson Anchors
Simpson Strong-Tie PWKIT40T Strong-Drive (T40) Offset Driver-Bit Kit for SDPW Deflector Screw
$19.26Unit price /UnavailableBackorder - Ships In 3-7 DaysSimpson Anchors
Simpson Strong-Tie MTHZ1S (#7 x 1") MTH Wood Underlayment Screw Collated Yellow-Zinc (2500 Pack)
$116.18Unit price /UnavailableBackorder - Ships In 3-7 DaysSimpson Anchors
$123.26$165.67Unit price /UnavailableBackorder - Ships In 3-7 Days- 26% off
Simpson Anchors
Simpson DWCG158S Quik Drive DWC Drywall Screw for Wood-to-Wood Fastening (2500 Pack)
$100.81$135.50Unit price /UnavailableBackorder - Ships In 3-7 Days - 26% off
Simpson Anchors
Simpson DWHL178PS Quik Drive Drywall Screw High/Low Threads Gray Phosphate (2000 Pack)
$117.57$158.02Unit price /UnavailableBackorder - Ships In 3-7 Days Simpson Anchors
$395.97Unit price /UnavailableVery low stock (2 units)Simpson Anchors
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$176.78Unit price /UnavailableBackorder - Ships In 3-7 DaysSimpson Anchors
$606.95Unit price /UnavailableBackorder - Ships In 3-7 DaysSimpson Anchors
Simpson Strong-Tie CBSDQ106S (#8 x 1-1/16") Sheathing-to-CFS Screw Ribbed Flat Head (2500 Pack)
$360.36Unit price /UnavailableBackorder - Ships In 3-7 Days- 26% off
Simpson Anchors
$148.90$200.16Unit price /UnavailableBackorder - Ships In 3-7 Days Simpson Anchors
Simpson Strong-Tie WSF134LRVS Wood-To-CFS/Aluminum Screw, Yellow Zinc (2000 Pack)
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Simpson Anchors
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Simpson Anchors
$72.95$98.06Unit price /UnavailableBackorder - Ships In 3-7 Days

Simpson Strong-Tie Self-Drilling Screws
- Simpson Bulk Loose Self-Drilling Screws: Individual screws with hardened drill points that penetrate steel without pre-drilling, ideal for varied applications and custom installations where flexibility is needed
- Simpson Collated Self-Drilling Screws: Strip-fed screws for automatic screw guns that combine drilling capability with high-speed installation for metal framing, roofing, and repetitive applications
Frequently Asked Questions
Can I use these screws with impact drivers?
Can I use these screws with impact drivers?
Yes, most Simpson construction screws are designed for use with impact drivers. However, always start at lower torque settings and adjust as needed to prevent over-driving or stripping. Self-drilling and structural screws particularly benefit from the consistent torque delivery of quality impact drivers.
How do I know which screw length to use?
How do I know which screw length to use?
The general rule is that the screw should penetrate at least 1.5 times the thickness of the material being attached. For structural applications, follow local building codes and Simpson's published specifications.
What's the difference between self-drilling and self-tapping screws?
What's the difference between self-drilling and self-tapping screws?
Self-drilling screws have a drill point that cuts through metal without pre-drilling. Self-tapping screws require a pre-drilled hole but cut their own threads. Simpson's self-drilling screws eliminate the pre-drilling step in most steel applications up to specified thicknesses.
Can I use wood screws in engineered lumber like LVL or LSL?
Can I use wood screws in engineered lumber like LVL or LSL?
Yes, but engineered lumber is typically denser than solid wood. You may need slightly more driving torque, and pilot holes might be beneficial near edges. Simpson structural wood screws are specifically tested with engineered lumber products.