GRK 5/16 x 3-1/8-inch Star Drive Round Washer Head RSS Rugged Structural Screw
GRK 772691122353 12235 5/16 x 6 RSS Rugged Structural Screws 50
GRK's RSS rugged structural screw is made of specially hardened steel to provide you with high tensile, torque and shear strength. The sharp threads and points bite instantly into the material (including hardwood), reducing the splitting effect due to smaller shanks. RSS screws which are 3-1/8 in and longer have a six threaded CEE thread that enlarges the screw hole for the non-threaded portion of the fastener, allowing the wood to settle easily and increasing the screw's drawing strength.
Screw RSS Handy Pk 1/4X3-1/8IN
GRK Fasteners 3/8 X 7-1/4 Star Drive Low Profile Washer, 40% OFF
Anyone here see a reason this platform wouldn't confidently hold
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GRK Fasteners RSS Rugged Structural Screw