3/8-16 1-1/2" Outdoor Rated Flat Head Stainless Steel Allen Head Bolt
Flat Head bolts are measured differently than Allen Head bolts!
For Flat Head Bolts, the listed length INCLUDES the head of the bolt, while Allen Head Bolts do not include the bolt head in the length. The length listed for these bolts is the overall length of the bolt from the top of the flat head to the end of the threads.
