It sounds like you are referring to a World War II exercise grenade, specifically the "Ubungs-Stielhandgranate." It seems you are mentioning that the parts of this grenade are designed to be screwed together, and perhaps there have been some revisions made to improve the assembly process.
If you are looking to 3D print the parts of this exercise grenade, it's important to note that producing replicas of military ordnance, even if they are inert or for historical reenactment purposes, may be subject to legal restrictions in some jurisdictions. I would advise ensuring that you are compliant with all relevant laws and regulations before proceeding with this project.
If you have specific questions about the design or printing process for the parts of this grenade, feel free to provide more details, and I'll do my best to help within the constraints of applicable laws and regulations.
不错的3d模型库素材，仅展示其中一张素材，下载可以查看完整原格式文件素材