supply of stiffner plate of front carrier plate etc. , stiffner plate of front carrier plate for aar-h-type cbc with bdg as per rdso drg. no. rdso/c g/drg/24034, alt.2 (annexure-1) or latest. material: as per is: 3885 part ii gr-5 with hardness in annealed c ondition 190-245 bhn (with hardware item hexagonal head bolt m16x45=2 nos, hexagonal castle nut m16= 02 nos, split pin 4x40=02 nos, spring washer b16=02 nos). note 1]50% of the stiffener plates shall be provi ded with holes having a pitch of 100 +/- 0.5 mm and a distance from the edge of 25 +/- 1 mm. 2]the remain ing 50% of the stiffener plates shall be provided with holes having a pitch of 90 +/- 0.5 mm and a distance fr om the edge of 30 +/- 1 mm. [ warranty period: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitted: m ax 8 lacs ] ]