10pcs M8 T-Slot Nuts T Sliding Nut Block Slots Carbon Steel Nuts

It's all down to economies of scale Bolts are made by the gazillion I don't know if this helps, but I sell flange nuts, which can be fitted

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m888 slot Spring nut suitable for 40 Series T Slot Profile and M6 bolt Designed to remain in position by itself when the slot is placed in the vertical position

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