CONFAST® - 1/4" x 2-3/4" CONFAST® 410 Stainless Steel Phillips Flat Countersunk Masonry Screw
These anchors come packaged with 50 pieces per box and are designed for fastening items to concrete.
- Bit size 3/16"
- Minimum embedment 1"
- Thread Length 1-3/4"
- Do not use in vibratory loads
- 1/4" inch diameter x 2-3/4" inch long
- Spacing must be a minimum of 10 anchor diameters
- Free freight on all orders over $25.00
|2000 PSI Concrete - Pull-Out (lbs.) *||449|
|2000 PSI Concrete - Shear (lbs.) *||540|
|Primary||Concrete, Block, and Brick|
|Minimum Edge Distance||3"|
|Maximum Fixture Thickness||1-3/4"|
|Minimum Fixture Hole Diameter (In Place)||5/16"|
|Minimum Fixture Hole Diameter (Hole Spotted)||5/16"|
|Length Measurement||Overall length including head|
The anchor is made from 410 Stainless Steel, and is Silver Ruspert Coated. This anchor is designed for use in Concrete, Block, and Brick.
The anchor is designed for use in a moist environment.
The anchor is a Flat Countersunk Phillips head and is designed to prevent the head from protruding above the surface of the item being attached.
Hole Diameter/Bit Diameter
The anchor requires a 3/16" hole to be drilled in the base material (Concrete, Block, and Brick). The hole should be drilled with carbide tipped bit that meets ANSI standards and used in a hammer drill.
A #3 phillips bit is required for driving the anchor into the base material.
Diameter of Anchor
The diameter of the anchor is 1/4".
The length of the anchor is 2-3/4"
The length of the threads on the anchor is 1-3/4" in length.
The anchor is packaged with 50 pieces per box and one (1) correct sized carbide bit.
The minimum anchor embedment into the concrete is 1". Therefore, the anchor must be installed so that a minimum of 1" of the anchor is embedded into the concrete.
Depth of Hole
The depth of the hole that is required for the anchor should be a minimum of 1/2" deeper than the anchor will penetrate the concrete. This will allow space for dust created during the installation process to fall, which will prevent the anchor from bottoming out in the hole before full penetration into the concrete.
Maximum Fixture Thickness
The maximum fixture thickness or the maximum thickness of the material being fastened for a anchor is 1-3/4". This will ensure that the minimum embedment of 1" will be met.
Fixture Hole Diameter
The hole in the fixture or material being fastened must be larger than the designated diameter of the anchor. The 1/4" diameter anchor requires the hole in the fixture to be 5/16".
Spacing between Anchors
Each anchor must be spaced a minimum distance of 4" from each other when measured center to center.
It is very important not to install the anchor any closer than 3" from an unsupported edge of the concrete.
When a bolt is used in conjunction with the anchor, the length of the bolt needed is determined by considering these factors:
- Flush With Concrete - when the anchor is set flush with the surface of the concrete, add the thickness of the material being fastened to the thread length of 1-3/4", and then add the space for any washers used.
Below Surface of Concrete - add the depth below the surface of the concrete to the thickness of the material being fastened, then add the space for the washer, and, finally, add 1-3/4" for the thread engagement.
Holding Values - Ultimate Load Values in 2000 PSI Concrete
1/4" x 2-3/4"
- Drill a 3/16" hole into the concrete using a carbide-tipped bit that meets ANSI Standards B212.15.
- Drill the hole a 1/2" deeper than the anchor will penetrate the concrete, making sure the minimum embedment requirements of 1" is met.
- Clean the hole with a wire brush, vacuum, compressed air, or a blow-out bulb.
- Insert the point of the 1/4" x 2-3/4" CONFAST® 410 Stainless Steel Phillips Flat Countersunk Masonry Screw into the hole. Make sure that the screw being installed will penetrate the base material a minimum of 1" but no deeper than 1-3/4".
- Turn the screw clockwise, applying slight pressure until the head of the screw is snug against the material being fastened.
- Always use proper personal protective equipment per manufacturer's and OSHA instructions.