HT hex head bolt of size M27X180X115 [ TL [ HT hex head bolt of size M27X180X115 [ TL ], grade: 10. 9 with Nyloc nut and spring washer. Bolt to IS: 1364, Nyloc nut to IS: 7002: 2005 and spring washer to IS: 3063. Bolt, nut and spring washer to be applied with cadmium coating. Make: Unbrako or DFL or TVS or VIF or BMI or LPS ]