Rock-On #9 x 2-1/4 in. Phillips High Low Threaded Wafer-Head Cement Board Screws (100-Pack)-23320 at The Home Depot
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Model # 23320

Internet # 100196699

Store SKU # 353046

#9 x 2-1/4 in. Phillips High Low Threaded Wafer-Head Cement Board Screws (100-Pack)

Rock-On #9 x 2-1/4 in. Phillips High Low Threaded Wafer-Head Cement Board Screws (100-Pack)

This item has been discontinued.
The Home Depot no longer carries this specific product.

$8.33 / each
Item cannot be shipped to the following state(s): AK,GU,HI,PR,VI


Model # 23320

Internet # 100196699

Store SKU # 353046

Rock-On #9 x 2-1/4 in. High-Low Threaded Wafer-Head Phillips Cement Board Screws (100-Pack) are ideal for attaching cement board to wood and light-Gauge steel. Use Rock-On screws for a variety of projects including bathtubs, showers, countertops and flooring applications.

  • Ideal for attaching durock and wonderboard to wood and light gauge steel
  • Use on a variety of projects including work with bathtubs, showers, countertops and flooring applications
  • Climacoat coating provides a lifetime guarantee against rust and corrosion
  • Zinc-plated steel construction
  • Deep high low threads allow quick entry and provide maximum holding power
  • Easy to install with a #2 Phillips screw driver (not-included)
  • Special rib design under head countersinks for flush seating in most board
  • No pre-drilling necessary - S-Point pre-drills hole and reduces splitting
  • Deep #2 Philips drive provides good stick fit and reduces cam-out
  • Wide .400 diameter wafer head provides greater pull-over value
  • #9 diameter screw provides extra strength and reduces head snap
  • When installing HardiBacker board, use Backer-On screws
  • Building code approved: conforms to ANSI A108.11 for cement board attachment
  • Available in 1-1/4 in., 1-5/8 in., and 2-1/4 in. lengths

Info & Guides

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Assembled Depth (in.)  .177 in  Assembled Height (in.)  2.25 in 
Assembled Width (in.)  .177 in  Drive Style  Phillips 
Driver bit included  No  Fastener Callout Size  #9 x 2-1/4" 
Fastener Thread Type  Hi-Lo  Fastener Type  Drywall Screw 
Finish  Climacoat  Finish Family  Gray 
Head Style  Flat  Indoor/Outdoor  Indoor 
Manufacturer Warranty  ITW Brands warrants that this product is free from defects in material and workmanship and that it will not rust or corrode. ITW Brands' sole liability for any breach of this warranty shall be to replace this product or refund the purchase price.  Measurement Standard  SAE 
Package Quantity  100  Primary Use  Attaching Durock, Wonderboard, and other glass-mesh cement board to wood or light gauge steel 
Product Weight (lb.)  .011 lb  Returnable  90-Day 
Screw Length  2-1/4 in  Self drilling  Yes 
Self tapping  Yes  Size  #9 
Tamper Resistant  No 


Rated 3.5 out of 5 by 2 reviewers.
Rated 2 out of 5 by Room for improvement Could really benefit from a Torx drive head. Out of a small box one was a useless screw with no threads. I would only recommend it because I do not know of a different option. Driving these through Hardi trim then siding and finally into the framing wore out a few drive bits, phillips just isn't the best for torque. September 6, 2014
Rated 5 out of 5 by Good product pulls rock board into place nicely Good product for the money holds rock board nicely in place February 17, 2012
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