Material: The knurled thumb nut is made of 304 stainless steel, high hardness, wear-resistant, not easy to deform, rust-proof and corrosion-resistant. Advantages [THREADED] - M4 x 0., 7mm. [MATERIAL] - Made of 304 stainless steel, rust resistance and durable to use. Specification:Material: 304 Stainless SteelFinish: Vibration PolishingThread Size: M4 x 0., 7mmOutter Diameter: 12mm / 0., 47Overall Height: 8mm / 0., 31Thickness( Knurled part): 3., 1mm / 0., 12 Package content: 2 x Knurled Thumb Nuts M4 Uxcell Knurled Thub Nut, 10Pcs 4x0.7 304 Stainless Steel Round Knobs Fasteners For 3D Knurled Thumb Nuts About this item Various Size: 25pcs knurled thumb nuts in 5 different sizes are included in the package, namely M3x0.5mm, M4x0.7mm, M5x0.8mm, M6x1mm, M8x1.25mm. Various sizes can meet your needs of daily use. Material [WIDELY USE] - Common on 3d printer beds, machine tools, cabinets, tool boxes, and great for maker projects and things that need adjusted quickly. It can open and close the air box cover quickly by hand without tools., 3., Made of stainless steel 304, strong and corrosion resistant. Uxcell 20 Packs M4 X 30mm Male Thread 14mm Head Knurled Knobs Thumb Screws Clamping Knobs 90fccd0e E6df 4aa0 A09b 3d468dd714bd.58d38cb5200d7b85369495405b5f813e Works with bolts, studs and screws.