VIGRUE 715PCS M2.5 x 4/6/8/10/12/16/20/25mm Hex Button and Socket Head Cap Screws Nuts Washers Assortment Kit with Storage Box, 12.9 Grade Alloy Steel Black: Amazon.com: Industrial & Scientific
OPIOL QUALITY® Sleeve nuts with raised head and slot, M5 x 14, made of stainless steel, A1 VA (10 pieces), nut slotted nut, sleeve nut, slotted drive, spacer sleeves, rustproof : Amazon.de: