Simpson Strong-Tie

Model # SD9112R100

Internet # 202071152

Store SKU # 477314

#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



Model # SD9112R100

Internet # 202071152

Store SKU # 477314

Store SO SKU # 592854

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

Info & Guides

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Assembled Depth (in.) 
2.0 in 
Assembled Height (in.) 
3.125 in 
Assembled Width (in.) 
3.875 in 
Fastener length (in.) 
Head diameter (in.) 
Screw Length 
1-1/2 in 
Drive Style 
External Hex 
Driver bit included 
Fastener Callout Size 
#9 x 1 1/2" 
Fastener Head Style 
Fastener Plating 
Fastener Thread Type 
Fastener Type 
Wood Screw 
Fastener/Connector Material 
Finish Family 
Head Style 
Flange Hex 
Measurement Standard 
Package Quantity 
Primary Use 
Wood to Wood 
Product Weight (lb.) 
0.77 lb 
Self drilling 
Self tapping 
Tamper Resistant 
Warranty / Certifications
Manufacturer Warranty 
Visit our website at strongtie.com and type in warranty in the search box for detailed warranty information 


Size: #9
Screw Length: 1-1/2 in
Fastener Thread Type: Coarse
Drive Style: External Hex
Head Style: Flange Hex
Fastener/Connector Material: Steel
Measurement Standard: SAE


Rated 4.6 out of 5 by 18 reviewers.
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 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 5.0 out of 5.0 by excellent fasteners This product is excellent. Installation is quick and easy, they package a driver with the fasteners, so there is no digging around or need to purchase an additional driver. I installed several hundred screws in my new deck and found 1 that did not have any threads. July 9, 2013
Rated 5.0 out of 5.0 by Even for my chicken coop... I used my DeWalt 1/4" impact driver to drive them in, They went in with out a hitch. Smooth and strong with plenty of bite.A bit on the pricey side but they are structure quality, my floor joist is not going to fall due to failure!! February 11, 2014
Rated 5.0 out of 5.0 by Good solution I like the hex/washer head--makes for quick positive driving. Very quick to use, and when used with the proper brackets/joist hangers, they make a very solid structure. June 17, 2014
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
  • 2016-01-17 T10:23:58.756-06:00
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