Notice: When purchasing, please confirm the size of your aluminum profile or T-groove to ensure that it matches the size of our T-bolt. Key item features ; Surface Treatment · Chrome Plating ; Applicable Aluminum Profile · 40 Series ; Dimension · M8 x 25mm ; Rod Length · 25mm/0.98 ; Pitch · 1.25mm/ 0.05... Description:1., Carbon steel T bolt surface chrome finish, quenching and tempering heat treatment, not easy corrosion, and high-hardness., 2., The t slot bolt is fixed between the aluminum profile and the accessories and needs to be used with nuts. T-slot Bolts M8 X 25mm T-Slot Drop-in Stud Bolts - 20 PCS, Stainless Steel A2-70, Full Thread For Sliding Fixtures & Furniture A2-70 T-slot Screws T-slot Bolt M8x25mm Uxcell M8x30mm T-Slot Drop-in Stud Sliding Bolt Screw Carbon Steel For 40 Series Aluminum Profile 10pcs 3D Printer Frame Bolts Product Name: T Slot Bolt; Applicable Aluminum Profile: 40 Series; Performance Rate: 6., 8; Dimension: M8 x 25mm , Rod Length: 25mm/0., 98; Pitch: 1., 25mm/ 0., 05; Head Size: 19 x 8., 5 x 5., 5mm/0., 75 x 0., 33 x 0., 22(L*W*T) Discover uxcell M8x25mm T-Slot bolts, ideal for 3D printers and CNC routers. Durable carbon steel, chrome finish. Get your 20pcs now Specification:Material: Medium Carbon SteelPerformance Rate: 6., 8Heat Treatment: Quenching + TemperingSurface Treatment: Chrome PlatingApplicable Aluminum Profile: 40 SeriesDimension: M8 x 25mmRod Length: 25mm/0., 98Pitch: 1., 25mm/ 0., 05Head Size: 19 x 8., 5 x 5., 5mm/0., 75 x 0., 33 x 0., 22(L*W*T)Package Content: 10 x T Bolts When installing, put the screw head into the profile groove and turn it 90 degrees to clamp it.