Screw NAS1153-2 Used as fasteners in aircrafts. Designed with fully accordance to the National Aerospace Standard 1153. Thread size: .1900-32 UNJF-3A Dash number: -2 Material: Steel AISI 4140 Model is simplified for drawings, without exact profile of thread, but with specified exact length of thread. Possible to use model for 3D printing for prototyping some mechanical components which needs to mount with this fastener.