Doshi Engineers manufactures Tee Head Bolts of Diameter 8 to 150 mm. Doshi Engineers is an ISO 9001: 2000 certified company that supplies industrial fasteners and engineering components. The Tee Head Bolts of Diameter 8 to 150 mm are used to close the joints on V-Band clamps. They must be seated correctly and torqued in accordance with the applicable maintenance manual.