The Strong-Drive TF Wood-to-Steel screw is a 3" (75 mm) load-rated structural fastener designed to bore through wood and into steel up to 15/32" thick. Its flat head with nibs easily countersinks into the wood and provides excellent pull-through resistance. Its #5 drill point with wings bores through wood before engaging and drilling into the steel member.
Strong-Drive® TF WOOD-TO-STEEL Screw | Simpson Strong-Tie (strongtie.com)