supply of hardened thread forming tapping screw etc.hardened thread forming tapping screw etc.,hardened thread forming tapping screw (self tapping) round head cone end type, size ( number): 10 x 7/8, make: gkw or similar. matl.& specn : is: 5957 / 2003 (2nd rev.) or latest. [ warra nty period: 30 months after the date of delivery ] ] , hardened thread forming tapping screw (self tapping) round head cone end type, size (number): 10 x 19 mm, make: gkw or similar. matl.& specn : is: 5957 / 2003 (2nd rev.) or latest. [ wa rranty period: 30 months after the date of delivery ] ] , hardened thread forming tapping screw (self tapping) round head cone end type, size ( number): 12 x 50 m.m.; make: gkw or similar. matl.& specn : is: 5957 / 2003 (2nd rev.) or latest. [ w arranty period: 30 months after the date of delivery ] ]