VIGRUE 840 PCS 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: Amazon.com: Industrial & Scientific
OPIOL QUALITY Sleeve nuts M8 x 20 with raised head and slotted stainless steel A1 (2 pieces), sleeve nut, flat head screws, slotted drive. : Amazon.co.uk: DIY & Tools
Draper Expert 21709 M8 x 1.25 Metric Thread Insert Refill (Pack of 12) : Amazon.de: DIY & Tools
VIGRUE 840 PCS 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: Amazon.com: Industrial & Scientific