ReliaBot 100mm T8 T8x4 Tr8x4 Lead Screw and Brass Nut (Acme Thread, 2mm Pitch, 2 Start, 4mm Lead) for 3D Printer and CNC Machine Z Axis: Amazon.com: Industrial & Scientific
binifiMux 360pcs M2.5 Black Male Female Nylon Hex Spacer Standoff Screw Nut Assortment Kit: Amazon.com: Industrial & Scientific
Amazon.com: 500pcs RC Car Screws Kits M3/M4/E Buckle/Shell Buckle/Screw Nuts/Hex Screws/Plugs RC Repair Tool Kit for HSP/Wltoys/Traxxa Scale RC Cars (500pcs) : Toys & Games
Amazon.com: Odinest T Nuts Tee Sliding Slot Nuts 20 Series M3 Threaded Slide in Pre-Assembly for 20x20 Aluminum Extrusions Frame with Profile 2020 Sereis 6mm Slot for CNC Router Build Rail 3D
uxcell Slide in T-Nut, M5 Threaded for 3030 Series Aluminum Extrusions Profile, Pack of 20: Amazon.com: Industrial & Scientific