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International Standard Category: Bolts, screws, studs

GB/T 6564-1986    Hexagon lobular socket thread forming screws
内六角花形圆柱头自攻锁紧螺钉;
Category No.:21.060.10 Valid Status:superseded
Issued Organization:0 Issued Date:1986-7-2
Implemented Date:1987-5-1 Abolished Date:
Superseded Standard.:GB/T 6564.1-2014 Hexalobular socket head cap thread rolling screws
Superseded Date:2015-3-1
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