SPAX PowerLags 5/16″ X 5″ L T-40 Hex Washer Head Serrated Structural Screws 50ct
Thread Type: Serrated. Head Type: Hex Washer Head. Product Type: Structural Screws. Application: Structural wood-to-wood connections including ledgers. Driver Bit Included: Yes. Callout Size: 5/16 in.