supply of atl torsion spring.atl torsion spring.,atl plated hex nut with torx screw (blc ) part no.72039 & 72040 of m/s holland co. or equival ent (for twist lock). [ warranty period: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitted: max 8 lacs ] ] , atl torsion spring (steel) for twist lock (blc) of m/s- holland co. part no. 72604 or equivalent. [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitted: max 8 lacs ] ] , twist head for atl mls holland co. [ warranty period: 30 months after the date of delive ry ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitted: max 8 lacs ] ] , automatic twist locks for blc wagon to rdsos drg. no.-contr.-9405-s-21, a lt. no. 7 or latest, item no. 15. material and specification conforming to rdso docum ent no. contr-01-msg-atl-2011 of nov 2011. this item is reserved for procurement fro m rdso approved sources only. [ warranty period: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitted: max 8 lacs ] ]