Simpson 0.470 x 4" Strong-Drive SDHR COMBO-HEAD Screw Blue Zinc 2 Way Radios 12/11 require web stiffeners

12/11 require web stiffeners

Chain drive on the top roll prevents slippage

High-wind and seismic-zone construction where certified weld strength and uplift capacity are required

Blade Size: 1-1/16 x 0

Designed to connect non-load-bearing walls to trusses and joists

Simpson 0.470 x 4" Strong-Drive SDHR COMBO-HEAD Screw Blue Zinc 2 Way Radios 12/11 require web stiffenersThe Simpson Strong Drive SDHR Combo Head Screw in 0. 470 in. diameter and 4 in. length is a heavy duty structural fastener engineered for mass timber construction, cross laminated timber (CLT) assemblies, and general interior structural applications. Featuring a unique combination head that accepts both a T40 6 lobe driver bit and a 17 mm hex head driver bit, this blue zinc coated screw is built to pull structural members tightly together with