High Precision DIN69872-1988 JT Pull Studs High Precision DIN69872-1988 JT Pull Studs, 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 pieceand even injuries on persons. Specifications 1, Material: 20CrMnTi 2, Pull stud is mainly used for connet the tool spindle and tool holder3, Type: BT pull stud, SK pull stud, ISO7388 Pull stud, CAT pull stud, Mazak Pull Stud, MTB Pull Stud, NT pull stud4, Hardness: HRC52-585, Surface blackening, grinding6, Total Length :54 mm, screw: M 167. Type: D40 /SK408. Used for DIN 40 Tool Holder Our TeLi mainlyinkindsofcollets, kindsoftoolholders, BTtoolholders, CATtoolholders, DATtoolholders, NTtoolholders, HSKtoolholdersseries, boringheadseries, tappingcollets, livecenters, drillchucksseries, andsoon. Product Show: Company Information SISHUI TELI TOOL CO., LTD. SISHUI TELI TOOL MANUFACTURING CO., LTD locates in SISHUI Economic Developing Zone.Our products can be divided into 3 types: the first is various Tooling System for CNC MachineTools, includingprecision Tool Holders, Spring Collets, Rough or Precision Boring Heads and Tapping Collets.