×

We use cookies on this site to enhance your user experience. By clicking "I AGREE" below, you are giving your consent for us to set cookies. Privacy Policy

Strong-Drive® SDS HEAVY-DUTY CONNECTOR Screw 

Fasteners for the Timber Drive™ System

This product's information may differ depending on the category of use. You are currently viewing details related to Fasteners for the Timber Drive™ System. You can also view product information related to the category: Strong-Drive® Exterior Wood Screws

The Simpson Strong-Tie Strong-Drive SDS Heavy-Duty Connector screw is a 0.250"-diameter high-strength structural wood 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.

The SDS Strong-Drive 1/4" wood screw line has expanded to include stainless-steel SDS screws in 1 1/2" to 3 1/2" lengths, suitable for fastening Simpson Strong-Tie stainless-steel products. Offering the same easy-driving, split-reducing installation of the standard SDS screw, these screws are made from Type 316 stainless steel. The stainless-steel SDS screws are appropriate for higher-exposure environments where maximum corrosion-resistance is required.
 

Key Features

  • Type-17 point enables easy driving with no predrilling
  • Available with a double-barrier coating and Type 316 stainless steel
  • 3/8" hex head with 0.500" integrated washer
  • Head is stamped with the Simpson Strong-Tie "≠" sign and fastener length for easy identification after installation
  • Replacement driver bit — BITHEXR38-R1

Applications

  • Heavy-duty Simpson Strong‑Tie connectors

Installation

  • Install Tip: A low-speed 1/2" drill with a 3/8" hex driver is the recommended tool for installation

Options

  • SDS25312SS-R25L, SDS25312-R25L and SDS25500-R25L packaged in a ledger-specific box with 3/8" hex-driver bit

Related Links

Catalog Pages

Related Literature

Product Information Table

Fastener Production Information and Stuff & Things
Model No. Coating/Material Length (in.) Shank Diameter (in.) Drive Type Head Type Thread Type Thread Length (in.) Point Type Packaging Qty.
SDS25112 Double-Barrier Coating 1 1/2 0.235 3/8 in. Hex Hex Head Serrated Threads 1 Type-17 Point 1500
SDS25112MB Double-Barrier Coating 1 1/2 0.235 3/8 in. Hex Hex Head Serrated Threads 1 Type-17 Point 300
SDS25112-R25 Double-Barrier Coating 1 1/2 0.235 3/8 in. Hex Hex Head Serrated Threads 1 Type-17 Point 25
SDS25200 Double-Barrier Coating 2 0.235 3/8 in. Hex Hex Head Serrated Threads 1 1/4 Type-17 Point 1300
SDS25200MB Double-Barrier Coating 2 0.235 3/8 in. Hex Hex Head Serrated Threads 1 1/4 Type-17 Point 250
SDS25200-R25 Double-Barrier Coating 2 0.235 3/8 in. Hex Hex Head Serrated Threads 1 1/4 Type-17 Point 25
SDS25212 Double-Barrier Coating 2 1/2 0.235 3/8 in. Hex Hex Head Serrated Threads 1 1/2 Type-17 Point 1100
SDS25212MB Double-Barrier Coating 2 1/2 0.235 3/8 in. Hex Hex Head Serrated Threads 1 1/2 Type-17 Point 200
SDS25212-R25 Double-Barrier Coating 2 1/2 0.235 3/8 in. Hex Hex Head Serrated Threads 1 1/2 Type-17 Point 25
SDS25300 Double-Barrier Coating 3 0.235 3/8 in. Hex Hex Head Serrated Threads 2 Type-17 Point 950
SDS25300MB Double-Barrier Coating 3 0.235 3/8 in. Hex Hex Head Serrated Threads 2 Type-17 Point 150
SDS25300-R25 Double-Barrier Coating 3 0.235 3/8 in. Hex Hex Head Serrated Threads 2 Type-17 Point 25
SDS25312 Double-Barrier Coating 3 1/2 0.235 3/8 in. Hex Hex Head Serrated Threads 2 1/4 Type-17 Point 900
SDS25312MB Double-Barrier Coating 3 1/2 0.235 3/8 in. Hex Hex Head Serrated Threads 2 1/4 Type-17 Point 125
SDS25312-R10 Double-Barrier Coating 3 1/2 0.235 3/8 in. Hex Hex Head Serrated Threads 2 1/4 Type-17 Point 10
SDS25312-R25L Double-Barrier Coating 3 1/2 0.235 3/8 in. Hex Hex Head Serrated Threads 2 1/4 Type-17 Point 25
SDS25412 Double-Barrier Coating 4 1/2 0.235 3/8 in. Hex Hex Head Serrated Threads 2 3/4 Type-17 Point 800
SDS25412MB Double-Barrier Coating 4 1/2 0.235 3/8 in. Hex Hex Head Serrated Threads 2 3/4 Type-17 Point 100
SDS25412-R10 Double-Barrier Coating 4 1/2 0.235 3/8 in. Hex Hex Head Serrated Threads 2 3/4 Type-17 Point 10
SDS25500 Double-Barrier Coating 5 0.235 3/8 in. Hex Hex Head Serrated Threads 2 3/4 Type-17 Point 500
SDS25500MB Double-Barrier Coating 5 0.235 3/8 in. Hex Hex Head Serrated Threads 2 3/4 Type-17 Point 100
SDS25500-R10 Double-Barrier Coating 5 0.235 3/8 in. Hex Hex Head Serrated Threads 2 3/4 Type-17 Point 10
SDS25500-R25L Double-Barrier Coating 5 0.235 3/8 in. Hex Hex Head Serrated Threads 2 3/4 Type-17 Point 25
SDS25600 Double-Barrier Coating 6 0.235 3/8 in. Hex Hex Head Serrated Threads 3 1/4 Type-17 Point 600
SDS25600MB Double-Barrier Coating 6 0.235 3/8 in. Hex Hex Head Serrated Threads 3 1/4 Type-17 Point 100
SDS25600-R10 Double-Barrier Coating 6 0.235 3/8 in. Hex Hex Head Serrated Threads 3 1/4 Type-17 Point 10
SDS25800 Double-Barrier Coating 8 0.235 3/8 in. Hex Hex Head Serrated Threads 3 1/4 Type-17 Point 400
SDS25800-R10 Double-Barrier Coating 8 0.235 3/8 in. Hex Hex Head Serrated Threads 3 1/4 Type-17 Point 10
SDS25800-R50 Double-Barrier Coating 8 0.235 3/8 in. Hex Hex Head Serrated Threads 3 1/4 Type-17 Point 50
SDS25112SS Type 316 Stainless Steel 1 1/2 0.235 3/8 in. Hex Hex Head Serrated Threads 1 Type-17 Point 1500
SDS25112SS-R25 Type 316 Stainless Steel 1 1/2 0.235 3/8 in. Hex Hex Head Serrated Threads 1 Type-17 Point 25
SDS25200SS-R25 Type 316 Stainless Steel 2 0.235 3/8 in. Hex Hex Head Serrated Threads 1 1/4 Type-17 Point 25
SDS25212SS Type 316 Stainless Steel 2 1/2 0.235 3/8 in. Hex Hex Head Serrated Threads 1 1/2 Type-17 Point 1100
SDS25212SS-R25 Type 316 Stainless Steel 2 1/2 0.235 3/8 in. Hex Hex Head Serrated Threads 1 1/2 Type-17 Point 25
SDS25300SS Type 316 Stainless Steel 3 0.235 3/8 in. Hex Hex Head Serrated Threads 2 Type-17 Point 950
SDS25300SS-R25 Type 316 Stainless Steel 3 0.235 3/8 in. Hex Hex Head Serrated Threads 2 Type-17 Point 25
SDS25312SS Type 316 Stainless Steel 3 1/2 0.235 3/8 in. Hex Hex Head Serrated Threads 2 1/4 Type-17 Point 900
SDS25312SS-R25 Type 316 Stainless Steel 3 1/2 0.235 3/8 in. Hex Hex Head Serrated Threads 2 1/4 Type-17 Point 25
SDS25312SS-R25L Type 316 Stainless Steel 3 1/2 0.235 3/8 in. Hex Hex Head Serrated Threads 2 1/4 Type-17 Point 25

Product Information Table

Model No. Length (in.) Drive Type Head Type Thread Length Thread Type Shank Diameter (in.) Coating/Material Packaging Quantity UPC
SDS25112 1 1/2 3/8 in. Hex Hex Head 1 Serrated Threads 1/4 Double-Barrier Coating 1500 707392230205
SDS25112MB 1 1/2 3/8 in. Hex Hex Head 1 Serrated Threads 1/4 Double-Barrier Coating 300 707392428602
SDS25112-R25 1 1/2 3/8 in. Hex Hex Head 1 Serrated Threads 1/4 Double-Barrier Coating 25 707392962502
SDS25200 2 3/8 in. Hex Hex Head 1 1/4 Serrated Threads 1/4 Double-Barrier Coating 1300 707392471608
SDS25200MB 2 3/8 in. Hex Hex Head 1 1/4 Serrated Threads 1/4 Double-Barrier Coating 250 707392200208
SDS25200-R25 2 3/8 in. Hex Hex Head 1 1/4 Serrated Threads 1/4 Double-Barrier Coating 25 707392201205
SDS25212 2 1/2 3/8 in. Hex Hex Head 1 1/2 Serrated Threads 1/4 Double-Barrier Coating 1100 707392803201
SDS25212MB 2 1/2 3/8 in. Hex Hex Head 1 1/2 Serrated Threads 1/4 Double-Barrier Coating 200 707392830207
SDS25212-R25 2 1/2 3/8 in. Hex Hex Head 1 1/2 Serrated Threads 1/4 Double-Barrier Coating 25 707392325703
SDS25300 3 3/8 in. Hex Hex Head 2 Serrated Threads 1/4 Double-Barrier Coating 950 707392685104
SDS25300MB 3 3/8 in. Hex Hex Head 2 Serrated Threads 1/4 Double-Barrier Coating 150 707392976103
SDS25300-R25 3 3/8 in. Hex Hex Head 2 Serrated Threads 1/4 Double-Barrier Coating 25 707392800606
SDS25312 3 1/2 3/8 in. Hex Hex Head 2 1/4 Serrated Threads 1/4 Double-Barrier Coating 900 707392696001
SDS25312MB 3 1/2 3/8 in. Hex Hex Head 2 1/4 Serrated Threads 1/4 Double-Barrier Coating 125 707392526902
SDS25312-R10 3 1/2 3/8 in. Hex Hex Head 2 1/4 Serrated Threads 1/4 Double-Barrier Coating 10 707392505600
SDS25312-R25L 3 1/2 3/8 in. Hex Hex Head 2 1/4 Serrated Threads 1/4 Double-Barrier Coating 25 707392124504
SDS25412 4 1/2 3/8 in. Hex Hex Head 2 3/4 Serrated Threads 1/4 Double-Barrier Coating 800 707392174905
SDS25412MB 4 1/2 3/8 in. Hex Hex Head 2 3/4 Serrated Threads 1/4 Double-Barrier Coating 100 707392143604
SDS25412-R10 4 1/2 3/8 in. Hex Hex Head 2 3/4 Serrated Threads 1/4 Double-Barrier Coating 10 707392495604
SDS25500 5 3/8 in. Hex Hex Head 2 3/4 Serrated Threads 1/4 Double-Barrier Coating 500 707392334705
SDS25500MB 5 3/8 in. Hex Hex Head 2 3/4 Serrated Threads 1/4 Double-Barrier Coating 100 707392747307
SDS25500-R10 5 3/8 in. Hex Hex Head 2 3/4 Serrated Threads 1/4 Double-Barrier Coating 10 707392178309
SDS25500-R25L 5 3/8 in. Hex Hex Head 2 3/4 Serrated Threads 1/4 Double-Barrier Coating 25 707392841005
SDS25600 6 3/8 in. Hex Hex Head 3 1/4 Serrated Threads 1/4 Double-Barrier Coating 600 707392588306
SDS25600MB 6 3/8 in. Hex Hex Head 3 1/4 Serrated Threads 1/4 Double-Barrier Coating 100 707392484806
SDS25600-R10 6 3/8 in. Hex Hex Head 3 1/4 Serrated Threads 1/4 Double-Barrier Coating 10 707392741701
SDS25800 8 3/8 in. Hex Hex Head 3 1/4 Serrated Threads 1/4 Double-Barrier Coating 400 707392737001
SDS25800-R10 8 3/8 in. Hex Hex Head 3 1/4 Serrated Threads 1/4 Double-Barrier Coating 10 707392228707
SDS25800-R50 8 3/8 in. Hex Hex Head 3 1/4 Serrated Threads 1/4 Double-Barrier Coating 50 707392119807
SDS25112SS 1 1/2 3/8 in. Hex Hex Head 1 Serrated Threads 1/4 Type 316 Stainless Steel 1500 707392696803
SDS25112SS-R25 1 1/2 3/8 in. Hex Hex Head 1 Serrated Threads 1/4 Type 316 Stainless Steel 25 707392322405
SDS25200SS-R25 2 3/8 in. Hex Hex Head 1 1/4 Serrated Threads 1/4 Type 316 Stainless Steel 25 707392634409
SDS25212SS 2 1/2 3/8 in. Hex Hex Head 1 1/2 Serrated Threads 1/4 Type 316 Stainless Steel 1100 707392756200
SDS25212SS-R25 2 1/2 3/8 in. Hex Hex Head 1 1/2 Serrated Threads 1/4 Type 316 Stainless Steel 25 707392624103
SDS25300SS 3 3/8 in. Hex Hex Head 2 Serrated Threads 1/4 Type 316 Stainless Steel 950 707392655701
SDS25300SS-R25 3 3/8 in. Hex Hex Head 2 Serrated Threads 1/4 Type 316 Stainless Steel 25 707392459408
SDS25312SS 3 1/2 3/8 in. Hex Hex Head 2 1/4 Serrated Threads 1/4 Type 316 Stainless Steel 900 707392390107
SDS25312SS-R25 3 1/2 3/8 in. Hex Hex Head 2 1/4 Serrated Threads 1/4 Type 316 Stainless Steel 25 707392618607
SDS25312SS-R25L 3 1/2 3/8 in. Hex Hex Head 2 1/4 Serrated Threads 1/4 Type 316 Stainless Steel 25 707392207801
    These coated fasteners possess a level of corrosion resistance that makes them suitable for use in some exterior and corrosive environments and with some preservative-treated woods. For applications in higher-exposure applications, consider type-300 series stainless-steel fasteners for superior corrosion resistance. See additional important information before selecting a fastener for a specific application.

Load Tables

SDS Heavy-Duty Connector Screw — Allowable Shear Loads — Douglas Fir–Larch and Southern Pine Lumber

 

See footnotes below.

SDS Heavy-Duty Connector Screw — Allowable Shear Loads — Spruce-Pine-Fir and Hem-Fir

  1. Noted loads are based on testing per ICC-ES AC233 and assume a minimum main member thickness of the screw length minus the side member thickness. All other allowable loads are based on the NDS and a minimum penetration of 6D = 1.5" into the main member.
  2. Values are valid for a connection involving only two members. Where the side and main members have different specific gravities, the lower specific gravity shall be used.
  3. Allowable loads are also applicable to structural composite lumber (e.g., LVL, PSL, and LSL) having an equivalent specific gravity of 0.50 or greater.
  4. Allowable loads are shown at the wood load duration factor of CD = 1.00. Loads may be increased for load duration by the building code up to a CD = 1.60. The designer shall apply all adjustment factors required per NDS.
  5. Loads are based on perpendicular installation into the side grain of the wood members.
  6. Loads apply to corresponding stainless-steel models.
  7. For in-service moisture greater than 19% use CM = 0.7.

SDS Heavy-Duty Connector Screw — Reference Allowable Withdrawal Loads — Douglas Fir-Larch, Southern Pine, Spruce-Pine-Fir and Hem-Fir Lumber

  1. The tabulated reference withdrawal design value, W, is in pounds per inch of the thread penetration into the side grain of the main member.
  2. The tabulated reference withdrawal design value, Wmax, is in pounds where the entire thread length must penetrate into the side grain of the main member.
  3. The tabulated reference withdrawal design values, W and Wmax, are shown at a CD = 1.0. For end-grain withdrawal, 0.65. Tabulated values must be multiplied by all applicable adjustment factors from the NDS as referenced in the IBC or IRC.
  4. Embedded thread length is that portion held in the main member including the screw tip.
  5. Values are based on the lesser of withdrawal from the main member or pull-through of a 1 1/2" side member.
  6. For in-service moisture content greater than 19%, use CM = 0.7.

SDS Heavy-Duty Connector Screw — Allowable Shear Loads for Ledger to Studs

  1. Allowable loads are limited to parallel-to-grain loaded solid-sawn main members (2" nominal). Wood side members may be loaded parallel or perpendicular to grain (see footnote 4).
  2. DFL/SP allowable loads are based on wood members having a minimum specific gravity of 0.50, and SPF/HF allowable loads are based on wood members having a minimum specific gravity of 0.42. Where the side and main members have different specific gravities, the lower values shall be used.
  3. Allowable loads are shown at the wood load duration factor of CD = 1.00. Loads may be increased for load duration by the building code up to a CD = 1.60.
  4. Minimum spacing of fasteners is 3" o.c., minimum end distance is 3" for all parallel-to-grain loaded members, or 4" for all perpendicular-to-grain loaded members, and minimum edge distance is 3/4" for all parallel-to-grain loaded members, or 1 1/2" for perpendicular-to-grain loaded side members.
  5. Screws may be installed with a maximum 1/2" thick intermediate layer of wood structural panel between the side and main member provided the wood structural panel is fastened to the main member per code and the minimum penetration of the screw into the main member (excluding the wood structural panel) is met.
  6. Visit the Drawing Finder and search for SD1-L for additional ledger fastening detail sheets and load tables in DWG, PDF or DXF format.
  7. Fastener loads are based on the lesser of single fastener ICC-ES AC233 testing with a safety factor of 5.0 or ICC-ES AC13 assembly testing with a factor of safety of 5.0.

SDS Heavy-Duty Connector Screw — Allowable Shear Values for Sole-to-Rim Connections

  1. Allowable loads are based on testing per ICC-ES AC233 and are limited to parallel-to-grain loading.
  2. Allowable loads are shown at the wood load duration factor of CD = 1.00. Loads may be increased for load duration by the building code up to a CD = 1.60.
  3. Minimum spacing of the SDS for sawn lumber applications is 3" o.c., minimum end distance is 3", and minimum edge distance is 5/8".
  4. Minimum spacing of the SDS for LVL and LSL applications is 6" o.c., minimum end distance is 6", and minimum edge distance is 5/8".
  5. Wood structural panel up to 1 1/8" thick is permitted between the sole plate and rim board provided it is fastened to the rim board per code and the minimum penetration of the screw into the rim board is met.
  6. A double 2x sole/top plate is permitted provided it is independently fastened per the code and the minimum screw penetration per the table is met.
  7. Minimum rim board height shall be 9 1/4" when using SDS screws for sole and top plate fastening.
  8. Sole-to-rim loads can be achieved without a wall below.

SDS Heavy-Duty Connector Screw — 2021 and 2018 IRC Compliant Spacing for a Sawn Lumber Deck Ledger-to-Rim Board

  1. Solid-sawn rim board shall be spruce-pine-fir, hem-fir, Douglas fir–larch, or southern pine species. Ledger shall be hem-fir, Douglas fir–larch, or southern pine species.
  2. Fastener spacings are based on single fastener testing of the Strong-Drive SDS screw with a safety factor of 5.0 and include NDS wet service adjustment factor.
  3. Multiple ledger plies shall be fastened together per code independent of the SDS screws.
  4. SDS screw spacing values (above) are equivalent to 2021/2018 IRC Table R507.9.1.3(1) and 2015 IRC Table R507.2, based on testing of the Strong-Drive SDS screw with a factor of safety of 5.0. The table above also provides SDS screw spacing for a wider range of materials commonly used for rim board, and an alternate loading condition as required by some jurisdictions.
  5. Screw models SDS25312, SDS25312SS and SDS25500.
  6. Visit the Drawing Finder and search for SD1-L for additional ledger fastening detail sheets and load tables in DWG, PDF or DXF format.
  7. Fastener loads are based on the lesser of single fastener ICC-ES AC233 testing with a safety factor of 5.0 or ICC-ES AC13 assembly testing with a factor of safety of 5.0.

SDS Heavy-Duty Connector Screw — Allowable Shear Loads — Steel Side-Plate Applications

  1. Allowable loads are shown at the wood load duration factor of CD = 1.00. Loads may be increased for load duration up to a CD = 1.60.
  2. Withdrawal loads shown are in pounds (lb.) and are based on the lessor value of either head pull-through for a 1.5"-thick wood side member or withdrawal from the main member. If entire thread length is not installed into the main member, calculate withdrawal based on 172 lb./in. of thread penetration for DF/SP wood and 121 lb./in. for SPF/HF wood. Maximum withdrawal values with a steel side plate are 635 lb. for 16 ga. and 800 lb. for 14 ga. due to head pull-through.
  3. LSL wood-to-wood applications that require 4 1/2", 5", 6" and 8" SDS screws are limited to interior-dry use only.
  4. Minimum spacing requirements are listed in ICC-ES ESR-2236.

See the Fastening Systems Technical Guide and refer to the Alphabetical Index for additional load tables, technical data and installation instructions for the Strong-Drive® SDS Heavy-Duty Connector screw.

Code Reports & Compliance

Drawings

PDF DWG DXF RFA IFC SAT