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GB国标-螺母-非金属嵌件六角法兰面锁紧螺母

GB /T 6183.1-2000( 代替 GB/T 6183-1986 | ISO 7043:1997 )
revailing torque tye hexagon nuts with flange(with non-metallic in sert)
非金属嵌件六角法兰面锁紧螺母