Product Details. 1.Short screw Thread ND9 vials (11.6*32mm) for GC and HPLC. 2.Available with black or blue screw caps with 9mm thread. 3.Available as closed top screw seals or with centre hole. 4.Vials with integrated Micro-Insert are also available. 5.Plastic Vials ND9 and Plastic Micro-Vials ND9. 6.Short screw Thread ND9 vial is designed to