There is no physical difference between a machine screw and a bolt. How they are used determines what they are called. If it is fastened with a nut, it is a bolt. If it is threaded into something else (like a casting), it is a machine screw. Take a machine screw out of a casting and put a nut on it and presto change-o, the machine screw magically transforms into a bolt. Thus, what are commonly called "head bolts" by millions of people working on American V-8s are actually "head machine screws." The B-screw is accurately named because it is not fastened with a bolt.
Laing Conley On Tuesday, February 22, 2022 at 6:08:41 PM UTC-5 aeroperf wrote: > Um, machine screws tend to be fastened with a screwdriver, while bolts > tend to have a nut and be fastened with a wrench. > This leaves open what to call a fastener that uses an allen wrench - most > common is capscrew, but bolt is also used. > > Real quick JIS explanation from a motorcycle guy: > https://www.youtube.com/watch?v=VpqUhIZ-EJo > > The VESSEL JIS +2 screwdriver is $10 from Amazon. > https://www.amazon.com/gp/product/B000TG8OTY/ > > When I discovered JIS and bought a JIS +2 screwdriver, adjusting > derailleurs and B-screws became a WHOLE lot easier. > And, yes, there’s a dot on their heads - you just have to look close for > it. > > aero (mechanical engineer) perf > -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To unsubscribe from this group and stop receiving emails from it, send an email to rbw-owners-bunch+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/rbw-owners-bunch/759eba8f-53e7-479b-9617-270a5eb34832n%40googlegroups.com.
