Simpson 3/4" Drop-In Internally Threaded Anchor DIAB75Model No. DIAB75 Drop In Anchor Coating Material : Zinc Plated Carbon Steel Drill Bit Dia. (in.) : 1 Length (in.) : 3 1 8 Rod Dia. (in.) : 3 4 Thread Length (in.) : 1 1 4 TPI : 10 Simpson Strong Tie introduces a redesigned Drop In anchor (DIAB) that provides easier installation into base materials. Improved geometry in the preassembled expansion plug improves setting capability so the anchor installs with 40% fewer hammer strikes than previous