supply of hss machine bridge reamers rh cutting with l.h. helical flute angle 25 degree , rake angle 4 degree positive relief angle 7 degree to 8 degree and taper end 13.50 mm size confirming to is: 5919 - 1978 amendment no.3hss machine bridge reamers rh cutting with l.h. helical flute angle 25 degree , rake angle 4 degree positive relief angle 7 degree to 8 degree and taper end 13.50 mm size confirming to is: 5919 - 1978 amendment no.3,hss machine bridge reamers rh cutting with l.h. helical flute angle 25 degr ee , rake angle 4 degree positive relief angle 7 degree to 8 degree and taper end 13.50 mm size confirming to is: 5919 - 1978 amendment no.3 [ warranty period: 30 months after the date of delivery ] ]