Not paintball bolts, but bolts as in threaded fastening objects...
What is it called when a bolt isn't completely threaded throughout the whole bolt? As in the whole bolt has a head then a long non-threaded portion, and at the very end it is threaded?
And also, where could I find bolts like this that could be small enough to, say, screw into a tippmann valve to replace the valve stem to cut off blowback? I have looked around hardware stores and there is nothing small enough, and also online. Unfortunately I don't know the real name for them so my searches are probably sloppy.
Generally bolts come with a threaded segment of about 5 to 6 diameters and any extra is unthreaded. Any remaining unthreaded portion is just the unthreaded body or shank of the bolt.
If you need a longer bolt that is completely threaded then what you're after is a machine screw instead of a bolt. Machine screws come with the entire length threaded. But machine screws normally only come in sizes up to around 1/4 to 3/8 or so unless you're rich and can special order a skid of them.
I just thought I'd take a quick peek and then the world went all yellow.....