Set of 3,900 hard rivets in 12 sizes. 100 degree countersink. Includes 3/32" 1/8" and 5/32". Each size includes 1/8 lb of rivets. MS20426AD3-3 - MS20426AD3-4, MS20260AD3-5, MS20426AD3-6, MS20426AD3-8, MS20426AD4-3, MS20426AD4-4, MS20426AD4-5, MS20426AD4-6, MS20426AD4-8, MS20426AD5-4, MS20470265-6 Made of 2117 Aluminum Alloy. Manufactured to MIL-R-5674