M6 x 30 METRIC MACHINE SCREWS / Phillips / Pan Head / A2 Stainless / Black Oxide The slotted aluminum sleeve helps

The slotted aluminum sleeve helps to hold fast without loosening or backing out even with internal and external vibrations

The parts are also seismically qualified for use in cracked concrete

Closed bottom versions (the cone is sealed to prevent dirt from getting in) are available also in selected sizes

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

8-18X2 5/8 Phillips Bugle Head Full Thread Self Drilling Drywall Screw Zinc and Bake

M6 x 30 METRIC MACHINE SCREWS / Phillips / Pan Head / A2 Stainless / Black Oxide The slotted aluminum sleeve helps