Simpson BA212 Top-Flange Joist Hanger for 2x12 Lumber 12-Ga Galvanized G90 RCA Rigid Connector Angles What does the checkered head

What does the checkered head pattern on this nail do

this left-oriented column cap helps distribute load from the beams and provides critical structural support at the connection point

The JET EVS-949 Mill with 3-Axis Newall DP700 (Knee) DRO from JET delivers precision-engineered vertical milling performance for machinists and shops that demand accurate

large ON/OFF switch with a built-in power indicator light and a removable magnetic safety key

Simpson BA212 Top-Flange Joist Hanger for 2x12 Lumber 12-Ga Galvanized G90 RCA Rigid Connector Angles What does the checkered headThe Simpson Strong Tie BA212 is a top flange joist hanger engineered for reliable performance in both engineered wood and solid sawn lumber applications. Designed as a cost effective, one piece alternative to welded hangers, the BA212 accommodates a nominal 2x12 joist and is capable of carrying medium loads with solid sawn lumber and higher loads with engineered wood products. Its full height joist flange captures the top chord of the joist,