Tenders for Supply of Lock Bolts With Collars. Diameter Of Lock Bolts 19.1 Mm, Grip 26, Suitable Grip Range-25.4 To 31.75 3/4 Dia, Grip - 25.4-31.75 With Collars, As Per Rdso Spec Is/Rdso-Wd/0001:2022, Str: Is/Rdso-Wd/000 1: 2022. Warranty Period: 30 Months After The Date Of Delivery