supply of collar (dia 84 x 30 mm) for screw couplcollar (dia 84 x 30 mm) for screw coupl,link for enhanced capacity screw coupling to rdso drg. no. sk-99002 alt-5, item no.1 material and specification : rdso spec. no. c-9505, rev. aug. 2001. [ warranty period: 30 m onths after the date of delivery ] ] , collar (dia 84 x 30 mm) for screw coupling to rdso sk 99002, alt.5. item 9. as per drg.no. rdso sk 99002, alt.5. item 9. specn: as per drawing. [ warranty period: 30 months after the dat e of delivery ] ] , collar phy 6l x 16 for enhanced capacity screw coupling to rdso drg. no. sk- 99002, alt. 5, i tem-10. mat. & spec.is:2062/2011 with amdt. no. l of nov.2012 grade-e250 c and confirming to rdso spe c. no. c-9505 (revised) of august2001. [ warranty period: 30 months after the date of delivery ] ] , trunnion (right hand thread) for screw coupling, to rdso sk-99002, alt-5, item no. 6. materi al & specification: rdso spec. no. c-9505 (revised), amendment 1 of october 2016. [ warranty period: 30 months after the date of delivery ] ] => limited