Quality Stainless Steel Screws from China.
https://www.ss-screw.com/china-cross_recessed_stainless_steel_pan_head_machine_screws_self_tapping_din_7981-11783647.html Jiashan Chaoyi Fastener. Co,LTD quality manufacturer from China.
DIN 7981 is cross recess pan head self tapping, also can called round head self tapping screw. Self - tapping Screw is in metal or nonmetal material drilled are cooperate with one of the female thread tapping out their kind of threaded fasteners. The Self Tapping Metal Screws are widely uesd in machinery, equipment, vehicles, ships, railways, bridges, buildings, structures, tools, equipment, instruments and so on
Stainless Steel A2 ,A4 improved corrosion resistance. Can be use outdoor