RIVETS Material: 12L14, 12L15, 12L13, SUM24L, SUS303, S416 of, S430F Model: RoundMaterial: 12L14, 12L15, 12L13, SUM24L, SUS303, S416 of, S430FThread type: NoneFinish: electroless nickel, bright nickel, trivalent blue zinc, color zinc, black zincProduction equipment: high-precision automatic lathes, cam walking effortAuxiliary processing: ultrasonic cleaning machine, vibration grinding machines, ...