DEWALT Crete-Flex® 410 Stainless Steel Concrete and Masonry Fasteners

General Information

The Crete-Flex anchor is a 410 stainless steel screw anchor designed for light to medium duty applications in concrete and masonry block base materials. It features more robust threads for enhanced engagement and "V" notches for efficient tapping, leading to reduced installation torque and increased performance. The anchor is coated with Stalgard® for enhanced corrosion resistance compared to carbon steel fasteners.

General Applications and Uses

• Window Frames
• Screens and Utilities
• Light Duty Industrial Applications
• Metal Door Frames
• Shutters and Guards
• Light Duty Fixtures

Features and Benefits

• Special heat treatment provides increased ductility and corrosion resistance.
• Larger-than-normal root diameters offer improved performance, including higher shear strengths.
• Stalgard® coating provides 1000 hours of salt spray resistance when tested in accordance with ASTM B117.
• Available in various head styles to fit the intended application.

Approvals and Listings

• Tested in accordance with ASTM E488
• Miami-Dade County Notice of Acceptance (NOA) No. 21-0201.08
• Florida Statewide Product Approval FL29068.1

Guide Specifications

CSI Divisions: 03 16 00 - Concrete Anchors, 04 05 19.16 - Masonry Anchors and 05 05 19 - Post-Installed Concrete Anchors. Screw anchors shall be Crete-Flex as supplied by DEWALT, Towson, MD. Concrete screw anchors shall be installed in accordance with published instructions and the Authority Having Jurisdiction.

Installation Specifications

Crete-Flex 410 Stainless Steel Carbon Steel Hex Head

Head Style Key: HWH = Hex Washer Head, HFH = Hex Flange Head, PFH = Phillips Flat Head, TFH = TrimFit® Flat Head

Notes:

• 1. For minimum nominal embedment depths, hnom, see the performance data tables. The minimum hole depth, ho, is 1/4-inch more than the selected nominal embedment depth.
• 2. 3/16-inch diameter Crete-Flex anchors require the use of a special tolerance UltraCon+ drill bit which have a tolerance range of 0.170" to 0.176".
• 3. Head Height of Hex Flange Head Anchors include the thickness of the flange.
• 4. Pre-drilling is not required for Crete-Flex into wood (but can be considered).

Crete-Flex Identification

The head markings consist of a "D" for the DEWALT brand, the number "4" for the 410 series stainless steel classification, and the length code. TrimFit flat head variations also include a star.

Crete-Flex Length Code Identification System

Anchor Detail

Nomenclature:

• da = Diameter of anchor
• dbit = Diameter of drill bit
• dh = Diameter of fixture clearance hole
• hnom = Minimum embedment depth
• ho = Minimum hole depth
• l = Base material thickness
• The minimum value of h should be 1.5hnom or 3" whichever is greater

Installation Instructions

1. Step 1: Using the proper drill bit size, drill a hole into the base material to the required depth, ho, which is a 1/4-inch deeper than the minimum embedment depth, hnom.
2. Step 2: Remove dust and debris from the hole during drilling (e.g., dust extractor) or following drilling (e.g., suction, forced air) to extract loose particles created by drilling.
3. Step 3: Attach an UltraCon+ installation socket tool for the selected anchor size to a percussion drill and set the drill to rotary only mode. Mount the screw anchor head into the socket. For flat head versions, a bit tip must be used with the socket tool.
4. Step 4: Place the point of the Crete-Flex through the fixture into the pre-drilled hole and drive the anchor in one steady continuous motion until it is fully seated at the proper embedment. The driver will automatically disengage from the head of the screw anchor.

Performance Data (ASD)

Ultimate Load Capacities for Crete-Flex in Normal-Weight Concrete

1. Tabulated load values are for anchors installed in uncracked concrete. Concrete compressive strength must be at the specified minimum at the time of installation.

2. Ultimate load capacities must be reduced by a minimum safety factor of 4.0 or greater to determine allowable working load. Consideration of safety factors of 10 and higher may be necessary depending upon the application such as life safety or overhead.

Allowable Load Capacities for Crete-Flex in Normal-Weight Concrete

1. Tabulated load values are for anchors installed in uncracked concrete. Concrete compressive strength must be at the specified minimum at the time of installation.

2. Allowable load capacities listed are calculated using an applied safety factor of 4.0. Consideration of safety factors of 10 or higher may be necessary depending on the application, such as life safety or overhead.

Ordering Information

Ultimate and Allowable Load Capacities for Crete-Flex in Grouted and Hollow Concrete Masonry

1. Tabulated load values are for anchors installed in minimum 8" wide, Type II, lightweight, medium-weight or normal-weight concrete masonry units conforming to ASTM C90. Mortar must be minimum Type N.

2. Allowable load capacities listed are calculated using an applied safety factor of 5.0. Consideration of safety factors of 10 or higher may be necessary depending on the application, such as life safety or overhead.

3. Tabulated load values for #14 screws with 1-5/8" embedment are applicable to grouted concrete masonry only.

Average Withdrawal Capacity Crete-Flex in Wood

1. Ultimate load capacities are based on laboratory tests and must be reduced by a minimum safety factor of 3.0 or greater to determine allowable working load.

2. Tests in Southern Yellow Pine (SYP) with minimum Specific Gravity of 0.55; screws oriented tangential to wood grain.

Crete-Flex Ordering Information

Head Style Key: HWH = Hex Washer Head, HFH = Hex Flange Head, PFH = Phillips Flat Head, TFH = TrimFit® Flat Head

One straight shank drill bit included in each standard box.

- Hex Washer Head and Hex Flange Head Crete-Flex anchors are measured from below the washer. Phillips Flat Head and TrimFit Flat head CreteFlex anchors are measured end to end. To select the proper minimum anchor length, determine the embedment depth (e.g., required to obtain desired load capacity), then add the thickness of the fixture, including any spacers or shims, to the embedment depth.

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