knurled wheel hub bolts

tall: 50mm or customized                        
Thread length: 30mm or customized          
dia1:19mm                                         
dia2:14.3mm                                    
Car make: universal
Material: carbon steel (40cr)
Surface treatment: zinc, blacking and color electrophoretic                                 
Thread size:12mm x 1.25, 12mm x 1.50, 14mm x 1.50 and 14mm x 2.0
Technique: forged head and heat treated for extra strength                                            
Mechanical performance grade:10.9 grade
Packing: double blister (clamshell), cardboard box, head card, plastic box and foam box or brown paper or customized
Certifications: TS16949
Customized orders are accepted