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High Quality Silver color BT50 45°Pull Studs High Quality Silver color BT50 45°Pull Studs by BT Standard MAS403-1982.Pull studs of minor quality not only decrease the performance of the machine,they are even a safety risk.A breaking pull stud might cause severe damage on machine and work piece and even injuries on persons. Specifications Product Name: pull nailProduct model: BT30/40/50Material: 20CoMnTiTaper shank: tolerance level < AT3Hardness: 56-58 HRCSurface roughness: Ra
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