Used for stitching metal or attaching to metal. A pre-drilled hole is required. Manufactured from A2 Stainless Steel for use where ultimate corrosion resistance. Stainless steel must be used where there is corrosive environment and/or the base material has inherent corrosive characteristics. Corrosion Rating: 4 - Urban & industrial areas with a moderate salt atmosphere. Driver Bit Size: PZ2. Gauge: 8. Head Type: Flange. Length (inch): 3/4. Length (mm): 19. Material: Austenitic Stainless Steel (A2-304). Pack Dimensions L x W x H (mm): 92 x 72 x 58. Pack Weight (kg): 0.387. Point Type: AB Point. Product Code: 4219CFASSR. Recess Type: Pozi. Size (imp.): 8 x. Size (mm): 4.2 x 19. Substrates: Steel, Thin Sheet Metal. Thread Dia. (mm): 4.2. Thread Type: 60° Self-Tapping.