supply of procurement of pin for bolster spring suspension to drg. no.- t-0-5-637, alt.-12 / p, is:5517-93 gr 45c8, c.rlya. hardening, tempering & magnaflux testing to be done as note 1 & 2 of drg. no. t-0-5-637, alt.-12 / p.procurement of pin for bolster spring suspension to drg. no.- t-0-5-637, alt.-12 / p, is:5517-93 gr 45c8, c.rlya. hardening, tempering & magnaflux testing to be done as note 1 & 2 of drg. no. t-0-5-637, alt.-12 / p., pin for bolster spring suspension to drg. no.- t-0-5-637, alt.-12 / p, is:5517-93 gr 45c8, c.rlya. hardening, tempering & magnaflux testing to be done as note 1 & 2 of drg. no. t-0-5-637, alt.-12 / p. [ warranty period: 30 months after the date of delivery ]