Simpson 3/8" Drop-In Internally Threaded Anchor 316 Stainless Steel DIA376SSDrop in anchors are internally threaded drop in expansion anchors for use in flush mount applications in solid base materials. Minimum thread engagement should be equal to the nominal diameter of the threaded insert Model No. DIA376SS Drop In Anchor Coating Material : Type 316 Stainless Steel Drill Bit Dia. (in.) : 1 2 Length (in.) : 1. 5625 Rod Dia. (in.) : 3 8 Thread Length (in.) : 5 8 TPI : 16 Component Material, Anchor Body : Type 316 Component