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International Standard Category: Bolts, screws, studs

GB/T 6559-1986    Screw thread shanks for thread forming screw; Metric coarse thread series
自攻锁紧螺钉的螺杆 粗牙普通螺纹系列;
Category No.:21.060.10 Valid Status:valid
Issued Organization:CMIF Issued Date:1986-7-2
Implemented Date:1987-5-1 Abolished Date:
Superseded Standard.: Superseded Date:
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