Brass Insert Injection Molding Knurled Thread Nuts. Specifications: Material: Carbon Steel DIY Supplies: Metalworking Type: BRASS ROUND NUT Die Casting Brass Knurled Thread Inserts Nuts M1.4 OD = 2.5mm L = 2/3/4/5/6 M1.6 OD = 2.5mm L = 2/3/4/5/6 M2 OD = 3.5mm L = 3/4/5/6/8 M2.5 OD = 3.5mm L = 3/4/5/6/8 M3 OD = 4.2mm L = 3/4/5/6/8/10 M4 OD = 5.2mm L = 4/5/6/8/10 M5 OD = 6.3mm L = 5/6/8/10 M6 OD = 7.3mm L = 6/8/10 M8 OD = 10.3 L = 6/8/10/12