200 pcs) Metric DIN 557 M10X1.5 Square Nut, Steel Zinc Steel Class 5 - Zinc Plated: Amazon.com: Industrial & Scientific
400pcs) DIN 557 M10 A/F 17 Square Nuts A2-70 Stainless Steel, Ships Free in USA by Aspen Fasteners, ASSP0557210: Amazon.com: Industrial & Scientific
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