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Plastic ring creates countersunk recess to keep threads clean from pour residue
Governing Standard: ASME B18
High-hardness point and lead threads for drilling and tapping
Provides excellent shear values for overhead attachments
MACHINE SCREW
1/4-20 x 5 Elco Bi-Flex / Hex Washer Head / 18-8 Stainless / Stalgard / QTY 250 Plastic ring creates countersunk recessBi 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. Features & Specs High strength, ductility and reliability Higher corrosion resistance compared with carbon steel and 410 series stainless steel fasteners 18 8 stainless compatible with pressure treated lumber Immune to
