supply of safety chain complete for 20 t bogies , safety chain complete for 20 t bogies having palm pull rod to icf drg. no. emu/m-3-2-070 alt-c, one set consisting of: 1) chain (links) nom. size 8mm (item no.1), qty/set-2 nos.2) hex. head screw m8 x 65- grade 8.8 (item no.2), qty/set-3 nos.3) hex. nut m8-grade 8, (item no.3), qty/set-3 nos .4) sprin g lock washer b8 (item no.4), qty/set-3 nos.5) split pin dia. 2.5 x 20 (item no.5), qty/set-3 nos.6) plain w asher dia 25/dia 9 x 2 (item no.6), qty/set-4 nos.(sl.no.1 to sl.no.6 = 1 set). materialspecification as per the drawing [ warranty period: 30 months after the date of delivery ] ]