supply of procurement of compreg wooden packing cum clamp for 20 mm pipe with nut spring washer an bolt half threaded packing size 100x40x40mm, clamp size 120x40x38mm etc.procurement of compreg wooden packing cum clamp for 20 mm pipe with nut spring washer an bolt half threaded packing size 100x40x40mm, clamp size 120x40x38mm etc.,compreg wooden packing cum clamp for 20 mm pipe with nut spring washer an bolt half thr eaded packing size 100x40x40mm, clamp size 120x40x38mm as per rdso spec. no. c-9407. [ warranty period: 30 months after the date of delivery ] ] , wooden clamp 120x 40x 55 mm with wooden packing 120x40x40 for 32 mm pipe with nut s pring washer & bolt half threaded to rdso spec. no.c-9407 [rev.3] with amendment no. 4 of july 2019. [ warranty period: 30 months after the date of delivery ] ]