supply of various types of tapping screw etc.various types of tapping screw etc.,slotted csk head tapping screw size: m6 x 19-c mm to is : 7170/89.(01 box will contai n 500 nos. of screws) [ warranty period: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitted: max 8 lacs ] ] , slotted pan head self-tapping screw size 12x19 (with tread size 4.8 nominal length 19mm & cone end). make: baba/excel/rk only. [ warranty period: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitted: max 8 lacs ] ]