DRIL-FLEX^®

Specifications

Carbon Steel

Dual Hardened - Load Bearing Area meets SAE J429 Grade 5 and ASTM A449 Type 1 specifications
HEAD STYLES
Hex Washer Head (HWH)
Pan Head (PPH)
Wafer Head (PWH)
Undercut Flat Head (PUFH)
DIAMETER
#10, #12, 1/4", 5/16"
POINT DRILL
#2, #3, #4, #5
FINISH
Stalgard SUB coating (HWH)
Stalgard coating

Self-Drilling Structural Screws

Dril-Flex Structural Screws are dual heat-treated self-drilling tapping screws that provide the strength, ductility, and resistance to embrittlement required for critical applications

GENERAL APPLICATIONS AND USES

Curtain walls
Rainscreen
Window walls/glazing
Solar panel systemss

FEATURES AND BENEFITS

High-hardness point and lead threads for drilling and tapping
Lower-hardness load-bearing area provides increased resistance to Hydrogen-Assisted Stress Corrosion Cracking when compared to case-hardened fasteners
Stalgard^® and Stalgard^® SUB Coatings provide improved corrosion resistance as well as enhanced galvanic compatibility in dissimilar metal applications, including those involving aluminum, compared with fasteners with standard zinc plating
Fasteners coated with Stalgard^®SUB typically show no red rust or other base metal corrosion on significant surfaces after 2000 hours of salt spray exposure in accordance with ASTM B117
Fasteners coated with Stalgard^® typically show no red rust or other base metal corrosion on significant surfaces after 1000 hours of salt spray exposure in accordance with ASTM B117

APPROVALS AND LISTINGS

International Code Council, Evaluation Service (ICC-ES), ESR-3332
International Code Council, Evaluation Service (ICC-ES), ESR-4367
International Code Council, Evaluation Service (ICC-ES), ESR-4374
Code compliant with the International Building Code/International Residential Code: 2021 IBC/IRC, 2018 IBC/IRC, 2015 IBC/IRC, and 2012 IBC/IRC
Los Angeles Building Code (LABC) and Los Angeles Residential Code (LARC) ICC-ES Report Supplement (within each ICC-ES report)
Florida Building Code (FBC) ICC-ES Report Supplement (within each ICC-ES report)
Tested in accordance with ICC-ES AC118 for use in Steel-to-Steel Connections
Tested in accordance with ICC-ES AC500 for attaching Miscellaneous Building Materials to Steel
Tested in accordance with ICC-ES AC491 for use in Aluminum

GUIDE SPECIFICATIONS

05 05 23 – Metal Fastenings, 09 22 16.23 – Fasteners. Fasteners shall be Dril-Flex as supplied by DEWALT, Towson, MD. Fasteners shall be installed with published instructions and the Authority Having Jurisdiction.

MATERIAL SPECIFICATIONS

Fastener Component		Specification
Fastener		Medium carbon steel
Plating/Coating	HWH, PPH	Stalgard SUB coating 2,000 hour rating in ASTM B117 salt spray test
	PWH, PUFH	Stalgard coating 1,000 hour rating in ASTM B117 salt spray test
1. Head Styles: HwH = Hex washer Head; PPH = Phillips Pan Head; PwH = Phillips wafer Head, PUFH = Phillips Undercut Flat Head

Drill Flex Specifications

INSTALLATION SPECIFICATIONS

Point Size Selection Maximum Combined Material Thickness By Point Type

Drill Flex Point Size

Maximum Recommended Installation RPM

Nominal Sheet Metal Sizes

Nominal Screw Sizes

Diameter	RPM	Gauge	Decimal (in.)	Thread Dia.	Decimal (in.)
#10	2500	18	0.048	#10	.190
#12	2500	16	0.060	#12	.216
#12**	1800	14	0.075	1/4"	.250
1/4"	1800	12	0.105	5/16"	.3125
5/16"	1200

Drilling and Tapping Capacity (Maximum Material Thickness)

Drill Flex Drilling and Tapping Capacity

Minimum Screw Spacing and Edge Distance in Steel1,2

Screw Diameter: d (in.)	Minimum Spacing: 3d (in.)	Minimum Edge Distance: 1.5d (in.)	Minimum Edge Distance For Framing Members Under The 2018, 2015, and 2012 IBC: 3d (in.)
0.19 (#10)	9/16	5/16	9/16
0.216 (#12)	11/16	3/8	11/16
0.25 (1/4)	3/4	3/8	3/4
0.3125 (5/16)	15/16	1/2	15/16
1. For screws used in framing connections, when the spacing between screws is less than 3 times the nominal screws diameter, but at least 2 times the screw diameter, the allowable and design connection shear strength values must be reduced by 20 percent [Refer to Section B1.5.1.3 of AISI S240 (Section D1.5 of AISI S200 for the 2015 and 2012 IBC)]. 2. For screws used in framing connections, when the edge is parallel to the direction of the applied force, the minimum edge distance may be 1.5 times the nominal screw diameter. [Refer to Section B1.5.1.3 of AISI S240 (Section D1.5 of AISI S200 for the 2015 and 2012 IBC)]

Minimum Screw Spacing and Edge Distance in Aluminum

Screw Diameter: d (in.)	Minimum Spacing: 2.5d (in.)	Minimum Edge Distance: 1.5d (in.)
0.19 (#10)	1/2	5/16
0.216 (#12)	9/16	3/8
0.25 (1/4)	5/8	3/8
0.3125 (5/16)	13/16	1/2

INSTALLATION GUIDELINES

How to Install Drill-Flex Self-Drilling Structural Screws


Select a torque adjustable screw gun that aligns with the recommended installation RPM's of the particular fastener (DeWALT VersaClutch Screw guns are recommended). Adjust the setting on the screw gun so that the tool does not overdrive the fastener.	Attach an appropriate-sized hex nut driver/Phillips bit to the screw gun. Mount the screw fastener head into the driver.	Place the screw fastener against the work surface. While the screw fastener is in a perpendicular position, begin driving the screw fastener into the base material. Note: The ideal speed and pressure will depend on the characteristics of the base material as well as the screw size and point type. A trial installation is suggested to determine the optimal tool setting, speed and pressure for the material and application.	Drive the screw fastener until the head of the screw is in contact and snug tight with the work surface and/or the material being fastened.