400 each Blind Rivets ISO 15978 - 5X20-AIA/ST-H Material body : Aluminium Alloy Material Stem : Steel Minimun Tensile Strength : 3100,00 Newton Shear strength : 2150 single Newton Head Style : Flat Countersunk (included angle - less than 135 deg with or without chamfer) Countersink Angle 120,0 Degrees nominal Head major diameter : 8,7 mm minimum and 10,5 mm maximum Shank style : self-plugging Fastener length : 20,0 mm maximum Shank Diameter : 5,0 mm nominal Grip length : 12,0 mm minimum and 15,0 mm maximum Expansion device : Knob Stem-Type K