1/4" x 1-3/4" #3 Phillips Flat Head Masonry Screws

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CRL 3185407 1/4" x 1-3/4" #3 Phillips Flat Head Masonry Screws

Item #: 3185407 by CR Laurence

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In Stock $0.74 /each


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  • Complete Anchoring System for Concrete Block and Brick
  • Each Box Complete with Masonry Drill Bit
  • Available in Slotted Hex Washer or Phillips Flat Head Styles
  • Heat-Treated Carbon Steel with Blue R-Blocker Coating

Drill Hole

3/16 x 3-1/2 in (89 mm)



Drill Bit Size

3/16 x 3-1/2

Screw Size





Masonry Screw

Head Type


Drive Style


CRL Masonry Screws actually cut into masonry while installing using specially sharp cut threads. They hold strong in concrete, brick or block eliminating the need for expansion anchors, plugs with screws, or power actuated fasteners.
Common applications include: Electrical conduit and J-boxes; wall partition brackets; roof flashing; awning brackets; ceiling tie wire brackets; control panels; 1 x 2 wood furring; 3/4" (19 mm) plywood backer boards; sill plates; 2 x 4 wood nailers. Available in either 3/16" or 1/4" (5 or 6 mm) diameters and slotted hex washer or phillips flat head styles.
Each box of 100 screws comes with a carbide tipped drill bit to make the correct size holes. Each screw is coated with Climaseal® corrosion resistant coating.

Most shipping weights are approximate and have not been verified. If the exact weight is needed in order to determine shipping costs, and shipping costs are required in order for you to complete your order, please request this prior to submitting your order by contacting CRL Customer Service. Product images shown are of the actual product or a close representation. Colors can vary depending on your computer's video card and on how your monitor's color is adjusted.