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SD9 SS Connector SS Screw
SD9 SS Connector SS Screw
SD9 SS Connector SS Screw
SD9 SS Connector SS Screw
SD9 SS Illustration
SD9 SS Illustration
SD9112SS-R100
SD9112SS-R100
SD9212SS-R100
SD9212SS-R100

The load‑rated Strong‑Drive® SD Connector SS screw (SD SS) is a Type 316 stainless steel fastener designed, tested and approved for use with certain Simpson Strong‑Tie® stainless steel connectors. Type 316 stainless steel provides excellent protection in severe corrosion environments.

The SD SS screws have a 1/4" (6.35mm) hex head with a large integrated washer, and are stamped with the Simpson Strong‑Tie “≠” logo and fastener size for easy identification after installation.

Material & Finish

316 Stainless Steel

Features & Benefits
  • A premium fastener for a premium connection
  • The load rated SD SS screw has been tested and approved for use in Simpson Strong-Tie stainless steel connectors
  • Shank is specifically designed to match the fastener holes in Simpson Strong-Tie connectors
  • Screws are easier and more convenient to install than nails in certain applications where using a hammer is inconvenient
  • Stainless steel products are an investment in your outdoor structures. When you are ready to repair, remodel or replace your structure, SD SS screws are easy to remove, inspect, and install when compared with nailed connections
  • 1/4” (6.35mm) hex drive bit included
Applications
  • Simpson Strong‑Tie® stainless steel connectors
Model No. Table

Specifications - Hand-drive

Model No.

Size

Thread

Point

Material & Finish

Box Qty

Drive Size

PLEASE NOTE: Pre-drilling and countersink may be necessary at ends, butt joints, and on applications where denser material is used. Follow the board manufacturer’s recommendation where applicable. WARNINGS: Always wear PPE during installation. Corrosive environments, exposure to water, salt air, or chemicals (including some wood preservatives) may cause early failure.

SD9112SS-R100

#9 x 38mm

Serrated Threads

Sharp Point

316 Stainless Steel

100

1/4” Hex Head

SD9212SS-R100

#9 x 64mm

100

 

Table 1. Model numbers, markings, dimensions, and basic properties for the SD Connector SS screws

Model No.

Head
Marking
(##)

Screw Length
(mm)

Thread
Length
(mm)

Diameter (mm)

Fastener Strength

Shank

Major

Minor

Bending Yield Strength

(MPa)

Tension

(kN)

Shear

(kN)

SD9112SS

1.5

38

25.4

3.5

4.3

3.0

1070

3.5

2.9

SD9212SS

2.5

64

  1. Fastener length is measured from the underside of the head to the point.
  2. Thread length includes the point.
  3. Bending yield strength testing followed ASTM A F1575 and is based on minor thread diameter.
  4. Characteristic bending yield strength determined following EN14358.
  5. Tension and shear properties are based on 0.5 of the average load for screws tested in tension and shear, respectively. Shear strength is shear through the threads.

 

Table 2.  Characteristic Capacity (Qk) for single SD SS Screws Single Shear Connections (Type 1) – Seasoned Timber for Joint Groups JD4 and JD5 and Wood Structural Panels (WSP) 

Model No.

Screw Length (mm)

Thread
Length (mm)

Characteristic Shear Capacity - JD4 (N)

Characteristic Shear Capacity - JD5 (N)

Timber Side Member Thickness (mm)

Timber Side Member Thickness (mm)

11.9-12.7
(WSP)

18.3-19.1
(WSP)

35

11.9-12.7
(WSP)

18.3-19.1
(WSP)

35

SD9112SS

38

25.4

1525

-

-

1350

-

-

SD9212SS

64

1615

1810

1920

1340

1280

1830

  1. Main and side members shall have densities representative of JD4 and JD5, 550 kg/m3 and 500 kg/m3, respectively.
  2. Tabulated characteristic lateral capacities are for normal duration of load.
  3. Screws shall be installed normal to the surface of the timber member.

 

Table 3.  Characteristic Capacity (Qk) for Single SD SS Screws Single Shear Connection (Type 1) - Steel-to-Timber for Seasoned Timber for Joint Groups JD4 and JD5

Model No.

Screw
Length (mm)

Thread
Length (mm)

Characteristic Shear Strength

1-mm Steel-to-Timber

(N)

JD4

JD5

SD9112SS

38

25.4

1665

1080

SD9212SS

64

1970

1080

  1. The main members shall have densities representative of JD4 and JD5, 550 kg/m3 and 500 kg/m3, respectively.
  2. Tabulated characteristic lateral capacities are for normal duration of load.
  3. Screws shall be installed normal to the surface of the timber member.

 

Table 4.  Characteristic Capacity (Qk) for Single SD SS Screws Withdrawal Connections (Type 2) – Seasoned Timber for Joint Groups JD4 and JD5

Model No.

Screw
Length (mm)

Thread
Length (mm)

Characteristic Withdrawal Value
(N/mm)

JD4

JD5

SD9112SS

38

25.4

110

71

SD9212SS

64

  1. The main members shall have densities representative of JD4 and JD5, 550 kg/m3 and 500 kg/m3, respectively.
  2. Tabulated characteristic withdrawal capacities are for normal duration of load.
  3. Tabulated characteristic withdrawal values are in N/mm of thread length into the main member.

 

Table 5. Minimum recommended spacing for connections with SD CONNECTOR SS screws

Condition

Minimum Distance or Spacing
(mm)

Edge Distance

Perpendicular to grain loading

25

Parallel to grain loading

13

End Distance

Perpendicular to grain loading

50

Parallel to grain loading

50

Spacing

Between fasteners in a row

50

Between non-staggered rows

13

Between staggered rows

13

  1. Edge distances, end distances, and spacing of screws shall be sufficient to prevent splitting of the timber or as required in this table; or when applicable as recommended by the structural composite lumber manufacturer, whichever is more restrictive.
 
Brochures & Catalogues

Brochures and Catalogues

PDF icon Flyer - SD Connector SS Screw
Technical Data & Docs

Technical Data Sheets

PDF icon Technical Data Sheet - SDSS

Report Links

Warranty

Warranty

Alternative Products

Alternative Products

SCNR Ring-Shank Connector Nail

Strong‑Drive® connectors have been designed and tested with specific types of nails, which are generally referred to as Structural Connector Nails (SCN).

CNA Ring-Shank Connector Nail

CNA Ring-Shank Connector Nail is tested and approved for use with Simpson Strong-Tie joist hangers, brackets, straps and nail plates.

Inspiration

Inspiration

LUS46/77SS Installation using SD9212SS
H2.5ASS Installation using SD9112SS
Request a Demo

Request a Demo/Sample*

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*.

Request a Demo/Sample*

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 (2016-2018).