Set Of Arcing Studs For Hitachi Traction Motor Type Hs 15250A Consisting Of 03 Items As Per Rdso S Drg. No. - Skel-4707 (Alt. - 1) Ref. No. - 3, 4 & 5 As Follows -- (1) Arcing Stud Rocker Ring Side As Per Ref. No. 3, Qty. = 01 No./Set, (2) Spring Washer As Per Ref. No. - 4, Qty. = 01 No./Set, (3) Arcing Stud Brush Holder Side As Per Ref. No. - 5, Qty. = 01 No./Set.