supply of high speed steel saw blades or hand hack , high speed steel saw blades or hand hacksaw blades (type a) size 350 x 32 x 1.6 x 4.0 ( size 350 +/-2 mm nominal length ( l ) x 32 +/- 1 mm width (a) x 1.60 +/- 0.1 mm thick (b), 4 +/- 6% mm pitch, 6 teeth per inch) and shall be according to designation xt87w6mo5cr4v2 of is : 7291-1981 or latest. workmanship and finish-blades shall be free from burrs, rust, scale and other defects. the h ardness when measured as near to the tip of the teeth as possible shall be in the range of 850 hv to 90 0 hv and the hardness around pin holes shall be in between 400 to 500hv. [ warranty period: 30 mo nths after the date of delivery ] ]