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Screw Fastening Systems
5.2.3 Kwik-Flex Self-Drilling Screws

5.2.3.2 MATERIAL SPECIFICATIONS

Kwik-Flex Shank conforms to SAE J429 (Grade 5),
ASTM A449 with a core hardness of Rockwell C28 to C 34
Drilling tip and lead threads hardened to Rockwell C52
Mechanical Properties
fy
ksi (MPa)
fu
ksi (MPa)
92 (634) 120 (828)

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