Supply of 1/2 Inch 12.7 Mm Dia Bull Lock Bolt Pinround Head And Collar Zinc Plated Standard, 1624, Grip Range 1.500-1.750 37-44 Mm, Confirming Othertechnical Requirement As Per Rdso Drg. No. Wd-11036-S-01, Alt 1 Or Latest And Wd-11036-S- 02, Alt-Nil Or Latest.Confirming To Spec Is/Rdso/0001:2022 June.