Coolant Thru BT40 ISO 7388-2 Type A LDA40 Retention Knobs Pull Stud for CNC Tool Holders

BT40 Retention Knobs w/ Coolant Thru for CNC Tool Holders ISO 7388-2 Type A (often designated as LDA40) These pull studs have a through-hole for through-tool coolant. Based on the international standard ISO 7388/2-1984 Type A, an LDA40 pull stud typically conforms to the following physical metrics: Machine Interface / Taper Size: BT 40 / SK 40 Thread Size (g1): M16x2 Knob/Head Diameter (D1): 19 mm Neck/Neck Bolt Diameter (D2): 14 mm Pilot/Shoulder Diameter (D3): 17 mm Coolant ID Diameter (D4): 7.5 mm Overall Length (L1): 54 mm Functional Length (L2): 26 mm Thread Length (L3): 20 mm Wrench/Drive Size (SW): 19 mm