Material is referred to as stainless steel. They are carbon steel with stainless steel lids. If like me you want completely rust free, keep looking.
π© M6 1.0 Stainless Steel Flanged Hexagon Flange
8 Review
π© 5-Pack of M8x60mm Stainless Steel External Hex Expansion Bolts by Yasorn
10 Review
Highly π Sought-After Fastener: Connector 014973445713
9 Review
POWERTEC 4 Inch 20 2 Inch QTB1005 T Slot: A Revolutionary, High-Quality Power Tool Accessory!
8 Review