مكان المنشأ
Jiangsu, China
Product name
black allen steel 10.9 12.9 hex socket DIN7991countersunk screw
Standard
DIN7991,ISO10642,ANSI/ASTM,BS,JIS,GB.
Size
M2-M20, 3/16"-1/2", or customized
Material
stainless steel 304,316,alloy steel...
Surface treatment
black, galvanized, yellow zinc plated......