0707392977001

Simpson Strong-Tie

Model SD9112R100

Internet #202071152

Store SKU #477314

Store SO SKU #592854

#9 1-1/2 in. External Hex Flange Hex-Head Structural-Connector Screw (100-Pack)

$9.97 / each
If you buy 10 or more
$8.47 / each

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Product Overview

Designed to replace nails in certain connectors, the load-rated Strong-Drive SD screw has been tested and approved for use in many popular Simpson Strong-Tie products. The SD structural-connector screw features an optimized shank which is specifically designed to be compatible with the fastener holes in Simpson Strong-Tie connectors. The hex head virtually eliminates cam-out and helps avoid stripping of the head during installation. The sharp point of the screw enables fast starts, and the patented serrated threads reduce torque for improved drivability.

  • Tested and approved for use in many of our best-selling connectors for both interior and exterior applications
  • The single-fastener steel-side-plate load capacity of the SD9 exceeds that of the 10d common nail
  • Ideal for use in tight spaces where using a hammer is difficult and more control is desired
  • #9 x 1-1/2 in. Structural Screw
  • Includes 100 screws
  • Optimized heat-treating for ductility and strength

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Customer Questions & Answers

15 Questions21 Answers

Customer Questions & Answers

#9 1-1/2 in. External Hex Flange Hex-Head Structural-Connector Screw (100-Pack)
#9 1-1/2 in. External Hex Flange Hex-Head Structural-Connector Screw (100-Pack)

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4 answers

Are these self tapping or do you need to pre-drill

This question is from #9 1-1/2 in. External Hex Flange Hex-Head Structural-Connector Screw (100-Pack)
Asked by
Boston
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March 20, 2015
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Answers (4)

Asked by
oside, ca
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Home Improvement Profile: DIYer
July 27, 2015
Answer: 
if pressure treated wood, you may want to pre drill as stated above w/ 3/32 bit.
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Asked by
Connecticut
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May 13, 2015
Answer: 
They are self-tapping. I opted to pre-drill them for my installation, but I could just as easily have driven them without doing so and I did in a few cases when I didn't have my drill bit on me.
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Asked by
Warwick, RI
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May 12, 2015
Answer: 
Yes, they are self tapping
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March 23, 2015
Answer: 
Predrilling is not required for the SD Structural Connector screws, but is recommended if there is a potential for splitting. If you plan to predrill, a 3/32" bit should be used for the SD9 (as recommended in the NDS). Thank you!
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3 answers

how thin is the screw, #9 dosn't describe it. (i need 1/4 in.)

This question is from #9 1-1/2 in. External Hex Flange Hex-Head Structural-Connector Screw (100-Pack)
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new york
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September 18, 2014
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Answers (3)

Asked by
Connecticut
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May 13, 2015
Answer: 
All #9 screws have a root diameter of roughly 1/8".
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Asked by
Warwick, RI
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Home Improvement Profile: DIYer
May 12, 2015
Answer: 
Actually... #9 answers it perfectly... Google "Wood screw dimensions" and you'll find several links that tell you a #9 screw is maximum head diameter .358" (23/64) shank size .177" (11/64) and obviously the length of these is 1 1/2 inch.
So, if you need 1/4" shank diameter, then you'd likely want a #14 screw. (I've uploaded a chart with this answer)
User submitted photo
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September 19, 2014
Answer: 
Hello sd21c, I’m Chris from the Home Depot’s how-to Community. Thank you for your question.
Actually, screw sizes below ¼” are numbered. The shank size of this #9 screw is 0.131”, compared to the 0.250 (1/4”) that you are looking for.
See the spec sheet here:
http://www.homedepot.com/catalog/pdfImages/99/990badab-4e39-4b39-bcbb-03bbae9807d3.pdf
I hope this helps,
Chris.
.
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2 answers

#9 x 1.5in Simpson hex head connector screw; can I buy this product in a box of 500 or 1,000 and price

This question is from #9 1-1/2 in. External Hex Flange Hex-Head Structural-Connector Screw (100-Pack)
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San Mateo CA
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March 5, 2014
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Asked by
Las Cruces, NM, USA
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June 3, 2014
Answer: 
I only saw boxes of 100 but there may be larger sizes.
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March 6, 2014
Answer: 
Thank you for your recent inquiry with The Home Depot. Because this item is only available in Home Depot stores, I believe the best advice would be to talk to one of our many specialty department professionals at your local Home Depot store. For any other questions, please visit your nearest local Home Depot store or call us at HomeDepot.com Customer Service 800-430-3376.
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1 answer

Use on CA pressure-treated wood?

This question is from #9 1-1/2 in. External Hex Flange Hex-Head Structural-Connector Screw (100-Pack)
Asked by
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July 4, 2016
I'm totally confused about compatibility of fasteners and connectors. Can these screws be used on CA pressure-treated wood? Can I use them with galvanized connectors (for example, A21), or do I need to use ZMAX connectors (A21Z)? Do these meet ASTM A 153, in terms of galvanization?
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Answer (1)

July 5, 2016
Answer: 
I am not clear what type of treated wood you are using, but I can tell you the SD screws have a mechanically galvanized coating meeting ASTM B695 Class 55 which is recognized as an alternate to hot-dip galvanized in ESR-3046. This finish provides a medium level of corrosion protection, but can be used with either the standard galvanized connectors (G90 - low level of corrosion protection) or the Z-MAX Read More
I am not clear what type of treated wood you are using, but I can tell you the SD screws have a mechanically galvanized coating meeting ASTM B695 Class 55 which is recognized as an alternate to hot-dip galvanized in ESR-3046. This finish provides a medium level of corrosion protection, but can be used with either the standard galvanized connectors (G90 - low level of corrosion protection) or the Z-MAX connectors (G185 - medium level of corrosion protection). Please see the Guidelines for Selecting the Proper Materials and Coatings page on our website or in our catalog to confirm the recommended finish (connectors and fasteners) for your application. Thank you! Read Less
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Customer Reviews

Rated 4.6 out of 5 by 19 reviewers.
Rated 5.0 out of 5.0 by So much easier than nails! LOVE these fasteners! Much easier than hammering nails and (in my opinion) provide a tighter more secure joist set in place. May 8, 2016
Rated 5.0 out of 5.0 by Easy to drive with smaller impact driver I hate banging nails in tight spots, made life so much easier. Easy to remove to lift a joist hanger and reset. June 23, 2013
Rated 5.0 out of 5.0 by Top Notch Fastener These screws were precisely what I was looking for when installing hurricane ties on my shed. The hex heads fit very snugly into the included bit, which virtually eliminates the chance of rounding and makes it easy to sink them one-handed. The ability to sink these screws with a drill is excellent, so is the ability to EASILY remove them if need be without having to beat on your structure or pry helplessly at nail heads. I see that many folks have complained about the price, even giving the product one less star because they feel that these fasteners cost too much. Look: they do cost more than comparable nails, but only because they are worth every penny. If you have the budget to afford these screws for use with your structural ties, then I highly recommend them. May 13, 2015
Rated 5.0 out of 5.0 by Great Security for Joist Hangers I chose these screws because I was replacing an old 20' x 20' deck that was built in the 70's and as I ripped up the deck boards I could see that a lot of the nails used on the joist hangers had been either loosened over time or some the nail head had broken off. I have used these screws on a previous deck and they hold strong, plus they are design for the purpose of connecting joist hangers. The good thing about these also is that if you misplace a hanger for some reason you can easily remove the screw and move the hanger. These screws are also made to withstand the chemicals in pressure treated wood, so they won't rust away. September 18, 2013
Rated 2.0 out of 5.0 by Mixed review on Simpson screw Most expensive but not easiest when using. While it comes with a hex-head bit that fits nice & tight, the screws are a challenge to sink into the wood - the pointed tips spin a lot before unexpectedly grabbing into the wood and THEN drive in uncontrollably fast causing it to sink much deeper than desired, sometimes. The tip affords very little grab and the shaft of the screw has way too much grabbing action. It's a tempermentatl fastener for sure! August 12, 2014
Rated 4.0 out of 5.0 by SIMPSON HEX-HEAD STRUCTURAL-CONNECTOR SCREWS The screws are strong and well-made; look durable though this is the first time I have used them. What I liked most is the hex-head fit snugly in the socket (the socket was included) so I was able to drill one-handed and use my other hand to hold the joist or whatever. They were a little on the expensive side (hence 4 stars instead of 5) but very pleased with the ease of use and quality. June 10, 2014
Rated 4.0 out of 5.0 by Good screw This screw has a hex-head with corresponding drive as opposed to the screw head that you insert a screw driver into. Consequently, when using a drill to drive screws, it is less likely to jump out in the process. The disadvantage is that the screw head is nearly 1/4" high, which will make a difference in some applications. June 3, 2014
Rated 4.0 out of 5.0 by Great but expensive These are great for joist hangers and attaching anything galvanized to pressure treated wood but they are a little expensive. August 19, 2014
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