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the spherical surface is very smooth,the precision of screw thread is high. as accessory it can improve integrated quality for your product.
material:low/medium carbon steel,stainless steel,structural alloy steel technological process:cut precious after hot forging specification:common american system
grade: 4.6-12.8,etc
features: 1) plating:plated zinc various/black(blue) oxide etc. 2) standards:din 444(din444),gb 798(gb798),m8-m64
free sample!
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