Peco, 3904J, Masonry Screw, 2-1/4 in Overall Length, Hex Head Drive, Steel, 1/4 in Thread
                
                
                    
                        
                            
                                
                                    Head Drive Type
                                    Hex
                                
                            
                                
                                    Material
                                    Steel
                                
                            
                                
                                    Overall Length
                                    2-1/4 in
                                
                            
                                
                                    Thread Size
                                    1/4 in
                                
                            
                                
                                    Brand
                                    Peco
                                
                            
                                
                                    Country of Origin
                                    US
                                
                            
                         
                    
                 
                
                    
                        
Masonry screw at a minimum should be install 10 anchor diameter apart spacing of anchorCase hardened high strength steelMeasurement of minimum embedment depth plus 1/4 in D of installation holeSafe working load is one quarter the average proof test load in table above tensile and shear strengthEach box or jar of masonry screw includes one masonry screw drill bit3/16 x 4-1/2 in drill1 to 1-3/4 in embedment3/4 to 1-1/4 in maximum fixture thicknessTensile strength of 615 lb for hollow block and 1138 lb for concreteShear strength of 1058 lb for hollow block and 1604 lb for concrete