Product Overview

ManualsBrandsDewalt ManualsAir Conditioning Installation Parts1/4" - 20 x 1" Bi-Flex Hex Washer Head Screws (Box of 2500)

SECTION CONTENTS

GENERAL INFORMATION

www.elcoconstruction.com

ANCHOR MATERIALS

• 300 series (18-8) stainless head and

shank and hardened steel tapping

threads and drill point

DIAMETER

• #8, #10, #12

• 1/4"

HEAD STYLES

• Hex Washer Head (HWH)

• Pan Head (PPH)

• Pancake Head (PPCKH)

• Undercut Flat Head (PUFH)

• Flat Head (PFH)

FINISH

• Stalgard GB (Galvanic Barrier) coating

CODE LISTED

ICC-ES ESR-4367

WOOD-TO-STEEL

BI-FLEX

GENERAL INFORMATION

BI-FLEX

Bi-Metal Self-Drilling Structural Screws

PRODUCT DESCRIPTION

Bi-Flex structural screws are bi-metal self-drilling tapping screws that provide the corrosion

resistance of 300 series stainless steel and the efﬁciency of drill screws. Bi-Flex screws are suitable

for use in both steel and aluminum.

GENERAL APPLICATIONS AND USES

• Steel-to-steel connections

• Aluminum-to-steel connections

• Aluminum-to-aluminum connections

• Wood-to-steel connections

FEATURES AND BENEFITS

+ High strength, ductility and reliabliity

+ Immune to hydrogen assisted stress corrosion cracking (HASCC)

+ Higher corrosion resistance compared with carbon steel and 410 series stainless steel fasteners

+ Stalgard GB coating creates greater galvanic compatibility in dissimilar metal applications,

including connections involving aluminum

+ 18-8 stainless compatible with pressure treated lumber

APPROVALS AND LISTINGS

• International Code Council, Evaluation Service (ICC-ES), ESR-4367

• Code compliant with the International Building Code/International Residential Code:

2018 IBC/IRC, 2012 IBC/IRC, and 2009 IBC/IRC

• City of Los Angeles, Supplement for 2020 LABC/LARC (in ESR-4367)

• Tested in accordance with AISI S905 and ICC-ES AC500 for

attaching Miscellaneous Building Materials to Steel

• City of Los Angeles, Research Report RR 25886

GUIDE SPECIFICATIONS

05 05 23 – Metal Fastenings, 09 22 16.23 – Fasteners. Fasteners shall be Bi-Flex as supplied by

Elco Construction Products, Towson, MD. Fasteners shall be installed with published instructions and

the Authority Having Jurisdiction.

General Information.........................1

Installation Speciﬁcations ..............2

Performance Data ............................3

Ordering Information ....................... 8

Hardened steel point

and tapping threads

300 series

stainless steel

head and shank

Stalgard

GB coating provides a barrier to resist

galvanic corrosion between dissimilar metals

Identification

The head marking consists of the number "3"

above the ELCO

logo as shown below.

Hex Washer Head Flat, Pan and Pancake Head

Summary of content (9 pages)

PAGE 1
General Information BI-FLEX® GENERAL INFORMATION SECTION CONTENTS BI-FLEX® General Information.........................1 Installation Specifications...............2 Performance Data.............................3 Ordering Information........................8 Bi-Metal Self-Drilling Structural Screws PRODUCT DESCRIPTION Bi-Flex structural screws are bi-metal self-drilling tapping screws that provide the corrosion resistance of 300 series stainless steel and the efficiency of drill screws.
PAGE 2
INSTALLATION SPECIFICATIONS Point Size Selection Maximum Combined Material Thickness By Point Type Maximum Recommended Installation RPM Diameter #8 #10 #12 #12** 1/4" Nominal Sheet Metal Sizes RPM 2500 1800 ** Applies to #12 diameter screws with point type 5 Nominal Screw Sizes Gauge Decimal (in.) Thread Dia. Decimal (in.) 25 22 20 18 16 14 12 0.021 0.030 0.036 0.048 0.060 0.075 0.105 #8 #10 #12 1/4" .164 .190 .216 .
PAGE 3
Performance Data BI-FLEX® PERFORMANCE DATA Fastener Strengths1,2,3,4,5,6,7 Tension (lbf) Shear (lbf) Description Head Styles Ultimate ASD LRFD Ultimate ASD LRFD #8-18 #8-18 #10-16 #10-16 #12-14 #12-14 #12-24 #12-24 1/4"-14 1/4"-20 1/4"-20 HWH PPH HWH PPH, PPCKH, PFH HWH PUFH, PPCKH HWH PFH HWH HWH PUFH, PFH 1,580 1,375 1,845 1,755 2,625 2,185 2,730 2,390 3,455 4,120 3,405 525 455 615 585 875 725 910 795 1,150 1,370 1,135 790 685 920 875 1,310 1,090 1,365 1,195 1,725 2,060 1,700 1,120 1,045
PAGE 4
Design (LRFD) Shear (Bearing) Capacity of Screw Connections in Steel, lbf 1,2,3,4,5,6 1. 2. 3. 4. 5. 6. Diameter Head Styles #8-18 #10-16 #12-14 #12-24 1/4"-14 1/4"-20 HWH, PPH HWH, PPCKH, PFH HWH, PPCKH, PUFH HWH HWH HWH Steel Thickness (Lapped Sheets/ Bars) 18-18 Ga. 16-16 Ga. 14-14 Ga. 12-12 Ga.
PAGE 5
Performance Data BI-FLEX® Design Tension Pull-Out Capacity of Screw Connections in Steel, lbf 1,2,3,4,5 Diameter Point Type #8-18 #10-16 #10-16 #10-16 w/wings #12-14 #12-14 #12-24 #12-24 w/wings 1/4"-14 1/4"-20 1/4"-20 w/wings 1/4"-20 #2 #2 #3 #3 #2 #3 #5 #5 #2 #3 #5 #5 Steel Thickness 18 Ga. 16 Ga. 14 Ga. 12 Ga.
PAGE 6
Allowable (ASD) Shear (Bearing) Capacity of Screw Connections in Aluminum, lbf 1,2,3,4,5,6 Aluminum Thickness (Lapped Sheets/Bars) Diameter #8-18 #10-16 #12-14 #12-24 1/4"-14 1/4"-20 1. 2. 3. 4. 5. 6.
PAGE 7
Performance Data BI-FLEX® Ultimate Pull-Over Capacity of Screw Connections in Aluminum, lbf1,2 Minimum Thickness of Aluminum in Contact with Screw Head Diameter #8 - 18 #8 - 18 #10 - 16 #10 - 16 #10 - 16 #12 - 14 #12 - 24 #12 - 14 1/4 - 14 1/4 - 20 Head Styles HWH PPH HWH PPCKH PPH HWH HWH PPCKH HWH HWH 1/32" 1/16" 1/8" 6063-T5 6063-T6 6061-T6 6063-T5 6063-T6 6061-T6 6063-T5 6063-T6 6061-T6 190 180 225 245 205 230 230 245 275 275 300 285 350 380 325 365 365 380 430 430 425 400 495 535 45
PAGE 8
ORDERING INFORMATION Bi-Flex Self-Drilling Structural Screws Cat. No.
PAGE 9
Ordering Information BI-FLEX® Bi-Flex Self-Drilling Structural Screws for Wood-to-Metal Applications Cat. No. 3 Description (Diameter- TPI x Nominal Length) Point Type EBN140 #10 - 16 x 1-1/2" #3 Maximum LoadBearing Length1 (in.) Finish Minimum Protrusion Length2 (in.) Nominal Head Diameter (in.) Qty / Carton 11/16" 0.370 3,500 1-1/4" 0.415 1,000 1-1/4" 0.480 1,000 #10 Diameter, #2 Phillips Flat Head with Wings Stalgard GB 0.