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Bolt Base 12mm A2 Stainless Steel Fine Pitch Hexagon Half Lock Nuts Hex Thin Nut DIN 439 M12 X 1.25mm - 2 : Amazon.co.uk: DIY & Tools
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Bolt Base 12mm A2 Stainless Steel Nylon Insert Nyloc Nylock Lock Nuts M12 X 1.75mm - 5 : Amazon.co.uk: DIY & Tools
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Axial force measurement of the bolt/nut assemblies based on the bending mode shape frequency of the protruding thread part using ultrasonic modal analysis - ScienceDirect
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