Concrete Screw Information

Flat Head Concrete Screw Length
Concrete Screw Slotted Hex Washer Head Length
Concrete Screw Embedment
Screw diameter Masonry bit size * Screw length Minimum embedment
3/16" 5/32" 1-1/4" 1"
1-3/4" 1-1/8"
2-1/4" or longer 1-1/2" **
1/4" 3/16" 1-1/2" 1"
1-3/4" 1-1/4"
2-1/4" 1-1/2" **
2-3/4" or longer 2" **

* Using the incorrect masonry drill bit will affect performance, and could lead to failure.

** Embedment should not exceed 2 inches.

NOTE: Concrete screws are susceptible to galvanic corrosion when used with aluminum, or when used in environments where moisture may be present.