Tempat asal
Jiangsu, China
Item
grade10.9 black hex socket DIN7991 countersunk screws
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 treament
black, galvanized, yellow zinc plated......