aluminum screw 1.Material:aluminum,steel,stainless steel,brass Stleels material , 2. ... management;4 Finishing:as requested;5 feacture of the knurled screw:good anti-corrosion ability demension:according to your requierment6 OEM ... high quality bolts, nuts, screws, and other non-standard specific fasteners, which comply with GB, ANSI, DIN, UNI, JIS and ISO ...