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Internet #203302235

Model #SDS25112-R25

Store SKU #1004584132

Store SO SKU #592854

1/4 in. x 1-1/2 in. Strong-Drive SDS Heavy-Duty Connector Screw (25-Pack)

  • Industry leader in structural hardware engineering since 1956
  • Products designed and tested for strength and easy installation
  • Diverse product line for DIY and residential
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How to Get It

Frequently Bought Together


Product Overview

Deck Glamour Photo

Deck It Out

Strong decks bring beauty and entertaining space to your outdoor living area

Deck Glamour Photo

Make Your Deck Beautiful and Safe

Building a safe, strong deck starts with the proper connectors and fasteners

Photo of a deck being built

Deck Building Tips and Tricks

Installing corrosion-resistant connectors and fasteners helps extend the life of your deck

SDWH Screw being installed into ledger

Ledger connections critical for deck safety

Strong-Drive® SDWH Timber-Hex HDG screw delivers high-strength, wood-to-wood connectivity, such as deck ledger applications

DTT2Z guardrail install

Guardrail Installation Tips and Tricks

Don’t take chances with guardrail connections. DTT2Z deck tension ties fasten guardrails to deck framing.

DTT1Z install

Securing the Deck to the House

Install DTT1Z as a tension tie to meet building codes and eliminate the need to access to the floor joists inside the home

LSCZ install

Take the Step to Secure Deck Stairs

LSCZ adjustable stair-stringer connector offers a concealed connection between the stair stringer and the carrying header or rim board

Tight LUS26Z install shot

Joist Hangers

Provides bearing and uplift resistance

Tight H1 install shot

Hurricane Ties

Ideal for preventing lateral movement of joists

Tight SD screw install photo

SD Connector Screw

The only screw approved with Simpson Strong-Tie connectors

Tight install shot of LCEZ4

Post Caps

LCEZ end post caps provide a post-to-beam connection in new or retrofit deck applications

Tight PBSZ install photo

Post Base

Features a 1 in. standoff to resist wood decay

Stainless-steel connector product shot

Prevent Corrosion

Deck-Drive DWP stainless-steel fasteners are recommended for higher-exposure environments or applications

The Simpson Strong-Tie Strong-Drive SDS Heavy-Duty Connector screw is a 1/4-in-diameter high-strength structural screw ideal for various connector installations as well as wood-to-wood and engineered wood applications. It installs with no predrilling and has been extensively tested in various applications. The SDS is improved with an easy-driving Type-17 point and a corrosion-resistant double-barrier coating.
  • Type-17 point enables easy driving with no predrilling and minimal wood splitting
  • 3/8-in hex head with 0.48-in integrated washer
  • Head is stamped with the Simpson Strong-Tie "≠" sign and fastener length for easy identification after installation
  • Serrated threads
  • Replacement driver bit model BITHEXR38-134 (not included)
  • Length: 1-1/2 in.
  • Corrosion-resistant double-barrier coating
  • Quantity: 25
  • A low-speed 1/2 in. drill with a 3/8 in. hex driver is the recommended tool for installation
  • Common project applications: remodeling, fencing, storage, cabinets, framing
  • Shop all Simpson Strong-Tie here.

Additional Resources

From the Manufacturer

You will need Adobe® Acrobat® Reader to view PDF documents. Download a free copy from the Adobe Web site.



Screw Length
1-1/2 in
Thread Pitch (mm)
2.54 mm
Threads Per Inch (TPI)


Color Family
Drive Style
External Hex
Fastener Plating
Fastener Type
Wood Screw
Fastener/Connector Material
ACQ Rated,Coated
Double-Barrier Coating
Finish Family
Head Style
No Additional Items Included
Materials Fastened
Wood to Wood
Measurement Standard
Package Quantity
Product Weight (lb.)
0.57 lb
1/4 in

Warranty / Certifications

Manufacturer Warranty
Limited Warranty

Questions & Answers

Typical questions asked about products:

  • Is the product durable?
  • Is the product easy to use?
  • What are the dimensions of the product?

Customer Reviews

  • 4.8
    out of 142 reviews
  • 94%recommend this product
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Showing 1-10 of 142 reviews
Expensive but rock solid and peace of mind that it...
Expensive but rock solid and peace of mind that it is rust resistant.
  • Verified Purchase
1 found this review helpful
Easy to start, no splitting. Excellent galvinized finish.
Easy to start, no splitting. Excellent galvinized finish.
  • Verified Purchase
  • Recommended
1 found this review helpful
I like very much this screws to bad I can’t...
I like very much this screws to bad I can’t get the ones for 100 pieces. I like them that much.
Response from Simpson Strong-TieMay 17, 2022
Hello, this is Stacy with Simpson Strong-Tie. We are very pleased to hear that you like our SDS Screws. Also, I wanted to let you know we only offer this size screw in packs of 25, 300, and 1500. If you were looking to purchase the pack of 300 you would need to call out model # SDS25112MB. If you wish to discuss this further feel free to call us at (800) 999-5099. We look forward to speaking with you. SimpsonStrongTie
  • Verified Purchase
Simpson SDS Heavy Duty connectors are high quality. The...
Simpson SDS Heavy Duty connectors are high quality. The extra heavy galvanization process is appreciated. Also the thread on the screws had a channel for quick screwing action.
  • Verified Purchase
Excellent screw. I bought these strickly because I needed a...
Excellent screw. I bought these strickly because I needed a screw thatwould pass building inspection. Simpson Strong Tie screws have a special stamp on their head that can be identified by the building inspector.
Response from Simpson Strong-TieApr 20, 2022
Hello, this is Efrain with Simpson Strong-Tie. Thank you for your review on our product. We greatly appreciate your feedback and are delighted the product was able to meet your needs. If you have any further questions or need any additional information you can call us at (800) 999-5099. We look forward to speaking with you. Thank you. SimpsonStrongTie
  • Verified Purchase
  • Verified Purchase
  • Verified Purchase
  • Verified Purchase
Used these and the Simpson nails for a deck rebuild....
Used these and the Simpson nails for a deck rebuild. These are much easier to install than nails and great for tight spots where a hammer won’t fit.
Response from Simpson Strong-TieMar 28, 2022
Hello JasonN, this is Stacy from Simpson Strong-Tie. I am pleased to hear the Strong-Drive® SDS HEAVY-DUTY CONNECTOR Screw performed as expected and satisfied your needs. If you need more information or have additional questions, please contact the Simpson Strong-Tie Customer Service team at 800-999-5099. We look forward to hearing from you. SimpsonStrongTie
  • Verified Purchase
  • Verified Purchase
Showing 1-10 of 142 reviews