Syringe cap

For syringes with screw in / Luer lock style needles. I use these syringes for all sorts, like silicone grease, paints and soldering flux. occasionally they might come with a little screw in cap for when the needle is off, but I'd rather keep the needle mounted so it doesn't get lost or mixed up. A few minutes in fusion and this is what I came up with. Its a tight fit, so a quick run round the inside with a deburring tool and its easy enough to slide onto the syringe