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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)

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Product Details

About This Product

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.
  • Return Policy

Product Information

Internet # 203302235

Model # SDS25112-R25

Store SKU # 1004584132

Store SO SKU #592854



Screw Length

1-1/2 in


1/4 in

Thread Pitch (mm)

2.54 mm

Threads Per Inch (TPI)



Drive Style


Fastener Color


Fastener Material

Carbon Steel

Fastener Type

Wood Screw


ACQ Rated

Head Style

Hex Head


No Additional Items Included


Exterior, Interior

Materials Fastened

Wood to Wood

Measurement System


Package Quantity


Product Weight (lb.)

0.57 lb



Thread Style

Serrated Thread

Warranty / Certifications

Manufacturer Warranty

Limited Warranty

Questions & Answers

Q:Is it hot-dipped galvanized? I need some screws to install "TA 10-1/4 in. 12-Gauge ZMAX Galvanized Staircase Angle" with pressure-treated lumber for exterior stairs project. I think hot-dipped galvanized screws work best for this case.
by|Apr 20, 2024
1 Answer
Answer This Question

A:  ​Hi Dylan, thank you for your message. This is Ricardo with Simpson Strong-Tie. SDS screws come with a Double Barrier Coating which falls in the medium corrosive resistance​ range which is equivalent to HDG. For guidelines and recommendations on coatings and finishes please see link below. 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.​​https://www.strongtie.com/solutions/corrosion/wood-connectors-fasteners

by|Apr 23, 2024
    Q:Can you use these for joist hangers with pressure treated pine
    by|Apr 2, 2023
    1 Answer
    Answer This Question

    A:  Hi Jimg, this is McKenzie from Simpson Strong-Tie thank you for your message. We want to make sure we address your question on the SD screws installed into a joist hanger in pressure treated wood. Please contact the Simpson Strong-Tie Customer Service team at 800-999-5099 so we can better address your question. We look forward to hearing from you.

    by|Jun 6, 2024
      3 found this answer helpful
      Q:Simpson, Is this screw good enough for use with fence rails made of #2 Prime Ground Contact Pressure-Treated Lumber and your PGT2 connector or would the type 316 version of this screw be needed?
      by|Feb 21, 2023
      1 Answer
      Answer This Question

      A:  Hello, this is Stacy with Simpson Strong-Tie. Standard SDS screws are made with a double-barrier coating which is a medium level of corrosion protection. This can be used with some types of pressure treated lumber. Stainless steel SDS screws should only be used with stainless steel connectors. Please take a look at our corrosion classifications table obtained by the AWPA.. If you have any questions please call us at (800) 999-5099. We look forward to hearing from you.

      by|Mar 10, 2023
        Q:How do you drive such a thick no pre-drill screw so close to the very end of a board without splitting it?
        by|Jun 18, 2022
        2 Answers
        Answer This Question

        A:  pre drill the board is what i did

        by|Jun 25, 2022

          A:  Hello John, You have to be careful exactly how close you put the SDS screws to the end of a board. There are certain edge distance requirements depending on the application. 3/4" of an inch if into the narrow face of a stud or post and 1 1/2" - 2" if using into a horizontal beam, and the loads will vary. A good way to help with splitting however is to use a 5/32" pre-drill as well. Let us know if you have any further questions. Kind Regards, McKenzie

          by|Jun 20, 2022
            Showing 1-4 of 10

            Customer Reviews

            4.8 out of 5

            • 4.8 out of 155 reviews
            • 90% recommend this product
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            Showing 1-10 of 155 reviews
            Just the thing for fastening Simpson Strong-Tie and similar reinforcement brackets for lumber joints.
            • Verified Purchase
            Used these on Strong-Tie “L’s” to reinforce the frame on a new gate. Easy to drive the screws with a variable speed drill and socket. I did drill larger clearance holes in the strong-tie but also drove a few without enlarging the holes with no trouble. Heavy duty galvanized coating.
            • Verified Purchase
            A great product.
            A great product. Used with Simpson hurricane ties. Each box also came with a hex nut driver.
            • Verified Purchase
            • Recommended
            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
            • Verified Purchase
            Excellent connectors screws
            Excellent strong connector screws, and easy to use, also looks good left expose on pt.
            • Verified Purchase
            • Recommended
            Work out great as they should
            • Verified Purchase
            • Verified Purchase
            These are the recommended screws for use with Simpson staircase angles. They are heavy duty and should hold up well.
            • Verified Purchase
            SDS screws worked great!
            • Verified Purchase
            Showing 1-10 of 155 reviews