Material 04 brass, 303 stainless steel. Dimension M5-0.5xM3-0.5x6mm, M6.5-0.75xM4-0.7x8mm, M10-1.5x1/4-20x0.484”, M12-1.75x5/16-18x0.591”, 12-32x6-32x7.1mm. Finish P lain Features Brass Self Tapping Inserts are suitable for installation with wide range of Thermoplastics, used where high pull out resistance is required