supply of set of screwsset of screws,tapping screw [slotted pan head] st 4.8x13-c. cr/cd/ni plated confirming to is:717 3. sample should be approved by the consignee before bulk supply. [ warranty period: 30 mont hs after the date of delivery ] ] , csk head self tapping screw st 4.2 x 19 c [ warranty period: 30 months after the date of delivery ] ] , tapping screw [slotted csk flat head] st.4.8x25-c.cr/cd/ni plated confirming to i s:7170-1989 (reaffirirmed-2004) [ warranty period: 30 months after the date of delivery ] ] , cross recess csk head tapping screw st4.2x13-c-h stainless steel [ warranty period: 30 months after the date of delivery ] ]