Big Timber's 15 x 4" Bronze T-30 Lag Screw is built for demanding exterior structural applications where maximum strength and reliability are essential. Made from hardened steel and fully ACQ compatible, these lag screws are ideal for use with treated lumber and outdoor builds. The round wafer head provides a clean, low-profile finish, while the knurled shoulder minimizes friction and improves pull-down for a tight, secure hold. Deep, sharp threads deliver exceptional gripping power, and the T-30 drive allows for high-torque installation with reduced cam-out. Packaged in a durable plastic bucket with a sturdy metal handle, these lag screws are easy to carry, store, and keep organized on any jobsite. | Big Timber Bronze T-30 Lag Screw | Size 15 x 4"