美国采购需求：黄铜接头、软管倒钩、内螺纹管、封闭式螺纹接头、喇叭口接头、推入式接头

I'm currently working on a project where I need to attach a flexible hose to my pneumatic grease gun. The challenge I'm facing is that the grease gun has a 1/4” NPT fitting, but the flexible hose I have uses a 1/8” NPT fitting. I recently ordered a part to help with this, but unfortunately, the male threaded ends don't match as expected. I'm reaching out to see if you can provide a solution or recommend a suitable option that would work better for these connections. Looking forward to your advice!