Simpson #7 2-1/4 in Self-Drilling Siding Screw 410 Stainless 4000 Pk F07T225TDB Girder Tiedown and why are they preferred

and why are they preferred over standard bolts

Note: The HDU holdown is being discontinued and replaced with the new HDUE holdown

Length 1: 4-3/8 in

and using a different adhesive may result in improper performance

Simpson #7 2-1/4 in Self-Drilling Siding Screw 410 Stainless 4000 Pk F07T225TDB Girder Tiedown and why are they preferredThe Simpson F07T225TDB is a #7 x 2 1 4" self drilling siding screw engineered for reliable fastening of wood siding, wood panels, and metal trim to steel studs. Constructed from Type 410 stainless steel, this screw can be hardened through heat treatment, giving it the ability to drill through metal substrates. Featuring a low profile trim head, a #3 drill point, and a #1 square drive, it delivers consistent performance in demanding siding