Lock Bolt Size: Dia. 19.1 Mm Or 3/4 Inch With Collar Grip Range 31 To 38 Mm. One Set Co Nsisting Of 1 No. Lock Bolt & 1 No. Collar As Per Rdso Drg. Wd-11036- S-01 Alt.01 And Wd-11036-S-02 Alt. Nil. Material & Specification As Per Drawing. The Head Of The Lock Bolts Necessarily Be Marked With Manufacturer'S Identification. [ Warranty Period: 30 Months After The Date Of Delivery ] ]