Simpson #12 x 4" Strong-Drive DWP WOOD Screw Flat Head, 316 Stainless Steel PACK:1 Lb (36) Simpson Strong-Tie HDIA25 HDIA Hollow

Simpson Strong-Tie HDIA25 HDIA Hollow Drop-In Internally Threaded Anchor is a flush-mount expansion anchor engineered by Simpson Strong-Tie for attaching threaded rod to support conduit

while the compact trim head delivers a clean

Combining variable spindle speed control ranging from 80 to 3

and two XLSH78B1414 #14 shoulder screws driven through the center of the slot at the No-Equal logo position

creating a more secure attachment that resists the natural movement and uplift forces shingles experience over time

Simpson #12 x 4" Strong-Drive DWP WOOD Screw Flat Head, 316 Stainless Steel PACK:1 Lb (36) Simpson Strong-Tie HDIA25 HDIA HollowSimpson Strong Drive DWP Wood SS #12 x 4" Flat Head Screw in Type 316 Stainless Steel is a load rated structural fastener engineered for demanding exterior applications where corrosion resistance and verified performance are non negotiable. Designed for docks, boardwalks, decks near water, and other environments exposed to high or severe corrosion, this screw delivers the holding power and material integrity needed for long lasting structural