supply of heavy duty hose nipple, collar, tee fitting, union and elbow , m.s. heavy duty hose nipple to suit 1/2 inch id hose at one side x 1/2 inch bsp mal e threads at other end. [ warranty period: 30 months after the date of delivery ] ] , mild steel heavy duty collar 1/2 inch bsp female threads at both ends conformi ng to is: 1239. [ warranty period: 30 months after the date of delivery ] ] , heavy duty m.s. tee fitting 1/2 inch female bsp thread conforming to is-1239. [ w arranty period: 30 months after the date of delivery ] ] , heavy duty m.s union to size 1/2 inch bsp female threads at both ends conformi ng to is: 1239. [ warranty period: 30 months after the date of delivery ] ] , 1/2 inch bsp heavy duty m.s. elbow female conforming to is: 1239. [ warranty peri od: 30 months after the date of delivery ] ]