Made from carbon steel,have high hardness, surface is Nickel-plated for good rust resistance. Used for: Aluminum Profile 3030 and 4040 Series, Slot 8mm; Please confirm the depth of the groove before placing an order. If the groove of the profile is deep, it is recommended to use a nut with shrapnel. Easy to use, smart design with Spring Sheet Inserting a nut roll into the slot and twisting with a screw locks the nut in place. Package Content: 15 Pcs x 3030/4040 Series M8 Spring T-Nuts. Widely used for build CNC routers, 3D printers, CNC laser cutters, CNC plasma cutters, robotics projects, 3D carvers, machine guards, workstations, etc 1.Made of carbon steel nickel-plated.
2.M8 Thread.
3.Suitable for Aluminum Profile 3030 and 4040 Series
4.Easy to be roll into T slot of aluminum profile.
5.Could be used together with T screw/hex screw

Specification:
Main Color: Silver Tone
Material: Carbon Steel
Finish: Nickel Plated
Model: 3030/4040 Series-M8
Length: Aprrox.20mm / 0.79"
Width: Aprrox.12.4mm / 0.49"
Thickness: Aprrox.13.4mm / 0.53"
Package Content: 15 x Spring T-Nuts