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Product Details

The Strong‑Drive® SDWS is the 2nd generation structural screw, redesigned with a patented SawTooth™ Point. It delivers faster starts, less torque, and eliminates the need for pre-drilling, which means more screws installed and less labour for you compared to conventional installation. All this reduces tool wear and extends your battery life!

The SDWS is the advanced alternative to bolting timber, or batten and coach screws, being 30% faster and 10% stronger than an equivalent batten screw. Designed to be versatile the SDWS is recognised as a solution for timber connections and is backed by testing and load data.

Material

Carbon Steel

Finish

Double Barrier Coating — Suitable for interior, treated timber and external applications

Features & Benefits
  • 6-lobe T-40 drive eliminates cam outs, for easier installations and longer bit life — bit(s) included
  • Head stamped for easy identification of length and diameter, for building certification
  • Large Washer Head provides superior clamping, while nibs offer greater control for the installer when seating the head
  • Bold Threads design provides superior holding power, even into the end grain of timber
  • Patented SawTooth™ Point for faster starts, less torque and no pre-drilling
Applications
  • Outdoor Structures
  • Deck Frames and Ledgers
  • Landscaping
  • Structural Timber Framing — It replaces strapping, which means, no interference with wall cladding
  • Lintel Screw, Coach Screw, Lag Screw, Landscape Screw, Structural Screw, Ledger Screw, Retaining Wall Screw, Boundary Joist Screw, Deck Post Screw
Model No. Table

Model

Head Marking
(##)

Screw Length
(mm)

Thread Length1,2 (mm)

Diameter (mm)

Fastener Strength

Shank

Major

Minor

Bending Yield Strength3
(Mpa)

Characteristic Yield Moment4 (kNmm)

Tension5
(kN)

Shear5
(kN)

SDWS22300DB

3

76

38

5.6

7.7

5.0

1103

17.9

10.5

6.1

SDWS22400DB

4

102

60

SDWS22500DB

5

127

70

SDWS22600DB

6

152

1207

SDWS22800DB

8

203

SDWS221000DB

10

254

  1. For the purpose of measuring overall length, fasteners shall be measured from the underside of the head to bottom of the point.
  2. Length of thread includes the point.
  3. Bending yield strength determined following ASTM F1575 and based on minor thread diameter.
  4. Characteristic yield moment determined following EU14358 and based on minor thread diameter.
  5. Tension and shear properties are based on 0.5 of the average maximum load for screws tested in tension and shear, respectively. Shear strength is shear through the threads.
Table 2. Strong-Drive® SDWS Timber Screw Limit States-Reference Characteristic Load Values (N) for Timber-to-Timber Connections1,2,3,4,5

Model

Screw Length (mm)

Timber Joint Group

Characteristic Shear Loads (N)

Characteristic Withdrawal Capacity (N/mm)6

Timber Side Member Thickness

Face Grain

End Grain7

35

45

63

70

90

100

115

150

200

SDWS22300DB

76

JD4

6630

88

62

JD5

4995

82

50

SDWS22400DB

102

JD4

7400

6100

6100

112

69

JD5

6000

6000

4545

91

54

SDWS22500DB

127

JD4

7400

7400

6100

5655

5655

134

110

JD5

6000

6000

6000

3920

3920

93

78

SDWS22600DB

152

JD4

7550

7550

7550

7550

5865

5865

5840

134

110

JD5

6030

6030

6030

6030

5220

5220

4385

93

78

SDWS22800DB

203

JD4

8055

8055

8055

8055

7040

7040

7040

6100

134

110

JD5

6240

6240

6240

6240

5500

5500

5500

5485

93

78

SDWS221000DB

254

JD4

8055

8055

8055

8055

7040

7040

7040

7040

6100

134

110

JD5

6240

6240

6240

6240

5500

5500

5500

5500

5500

93

78

  1. Conditions without numbers in the matrix shall not be used.
  2. The main and side members shall have a minimum density of 530 kg/m3
    for JD4, or 450 kg/m3 for JD5.
  3. The tabulated characteristic shear loads and withdrawal are for normal duration of load.
  4. Screws shall be installed straight into the side grain of the wood main member with the screw axis at a 90-degree angle to the wood fibres.
  5. Minimum fastener penetration shall be equal to the screw length less the thickness of the wood side member.
  6. Tabulated characteristic values for withdrawal are in N/mm
    of thread length into the main member
  7. Withdrawal to end grain values are based on the lesser value of withdrawal from the main member or the characteristic pull-through of the screw through a 35 mm thick side member of the same Joint Group, or tensile strength of the screw.

Specifications - SDWS

Model No.

Size (mm)

Thread

Point

Head

Material & Finish

Box Qty

Drive Size

Replacement Bit

These fasteners possess a level of corrosion resistance that makes them suitable for use in some exterior and corrosive environments and with some preservative-treated timber.
For applications in higher-exposure applications, consider Type-300 series stainless-steel fasteners for superior corrosion resistance. Bit(s) included with every box of screws.
Pre-drilling and countersink may be necessary at ends, butt joints, and on applications where denser material is used. Follow board manufacturers recommendations where applicable.

SDWS22300DB-R50

5.6 x 76

Bold Threads

SawTooth Point

Washer Head

Carbon Steel
Double Barrier Coating

50

T-40, 6-lobe

BIT40T-134-RC3

SDWS22400DB-R50

5.6 x 102

SDWS22500DB-R50

5.6 x 127

SDWS22600DB-R50

5.6 x 152

SDWS22800DB-R50

5.6 x 203

SDWS221000DB-R50

5.6 x 254

SDWS22300DB

5.6 x 76

950

SDWS22400DB

5.6 x 102

600

SDWS22500DB

5.6 x 127

600

SDWS22600DB

5.6 x 152

500

SDWS22800DB

5.6 x 203

400

SDWS221000DB

5.6 x 254

250

 
Brochures & Catalogues

Brochures and Catalogues

PDF icon Flyer - SDWS Timber Screw
Technical Data & Docs

Technical Data Sheets

PDF icon Technical Data Sheet - SDWS

Report Links

Warranty

Warranty

CAD Library
Inspiration
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Experience the innovation of Simpson Strong-Tie products and how we can help you build safer, stronger structures. Please fill out your details and submit the form below. We’ll be in touch to provide you a demo and/or send you samples*.

Structural Connections

 

Unmatched Quality from the Truss to the Foundation

With nearly 60 years of field and R&D experience, Simpson Strong-Tie® timber connectors are manufactured to the industry's highest standards. From framing angles to straps to heavy-duty joist hangers, we offer the most diverse product line so that you have the right product for the job.

Simpson Strong-Tie® connectors offer unmatched quality with laboratory and field testing, and are backed by our uncompromising commitment to customer service. As the company that built the connector industry, you can count on Simpson Strong-Tie® to work closely with builders, engineers and building officials to deliver innovative, building code-compliant solutions to help build safer, stronger structures economically. Download the Structural Connectors Overview Flyer.

Timber Connectors

From testing to service to availability, everything we do is engineered to ensure your project's success. With every product, you know you are getting the quality, value, service and on-time delivery that we have built our reputation on for the past 60 years.

From straps and ties to joist hangers and much more, Simpson Strong-Tie® structural connectors increase the strength and safety of timber-frame structures. Each connector is unique to Simpson Strong-Tie and is designed for specific applications without the need to adapt metal plating to suit a connection. Download the Timber Construction Connectors Catalogue.