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jis flat head tapping screws
Material:steel, stainless steel, brass
Durability:4.6, 6.8
Surface:Zinc plating Cr3+, Cr6+ (blue or yellow)
Standard:JIS B 1122 : 1996,
.Material:steel, stainless steel, brass
Durability:4.6, 6.8
Surface:Zinc plating Cr3+, Cr6+ (blue or yellow)
Standard:JIS B 1122 : 1996,
.