Knurled Thumb Nuts, 10pcs M4 x D16mm x H10mm Carbon Steel Blind Hole Nuts Thumb Nuts and winding) is the coil

and winding) is the coil of wire attached to the top of a loudspeaker cone

10Pcs x Ceiling Hook Kit

The grommet kit contains 50 Set of eyelets

and the installation and disassembly are simple

good for threading or installing

Knurled Thumb Nuts, 10pcs M4 x D16mm x H10mm Carbon Steel Blind Hole Nuts Thumb Nuts and winding) is the coilDescriptions: 1. Material: The knurled thumb nut is made of carbon steel, with a nickel plated surface finish, high hardness, wear resistant, not easy to deform, rust proof and corrosion resistant. 2. Advantages: The head has a knurled design to increase friction, and it is easy to install and remove by hand without any tools. The thread is deep, the tooth pitch is uniform, and the fastening force is good. 3. Application: These blind hole knurled