STUD BOLTS, 1CR-0.5MO - 0.25V, WITH UN HEAVY HEX NUTS, 8UN THREAD, MATERIAL SPECIFICATION - STUD : ASTM A193 GR. B16 OR BS 4882 GR.B16, - NUTS : ASTM A194 GR.4 OR BS 4882 GR.4. DIMENSIONS : - STUDS : BS 4882 - NUTS : ANSI B18.2.2 OR BS 4882, - THREAD : ANSI B1.1 OR BS 1580, STUDS CLASS 2A, NUTS 2B. ADDITIONAL REQUIREMENTS : - MARKING TO BS 4882, - NUTS TO BE SEMI FINISHED. 01. 2 PCS SIZE : 3.1/2" X 1030 02. 4 PCS SIZE : 3.1/4" X 700 03. 2 PCS SIZE : 2.3/4" X 650 04. 2 PCS SIZE : 2.1/2" X 630