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| Thread ID: 35141 | 2003-07-03 08:38:00 | Screw You | bardin (1950) | Press F1 |
| Post ID | Timestamp | Content | User | ||
| 157217 | 2003-09-05 02:38:00 | Bah!!! *Recoils in shock* Um...yeah, thanks guys :) I like the HAMMER option. | bardin (1950) | ||
| 157218 | 2003-09-05 02:57:00 | And brass threads. All 19 tpi. :D Before Whitworth made a leadscrew for his lathe (by wrapping a string around a length of round bar and filing the groove alongside the string) there were no real standards. Blacksmiths made bolts with a file, too. BSW and UNC in the class you buy from the ordinary retailers are "interchangable" (except for the 12 and 13 tpi at ½") because the sloppy "fit" allows it. (And mixing UNC and Whit at ½ might give "self locking" :D) I think the size of the hex heads, and hex nuts are different, but your "crescent" (or Kiwi Hammer) will handle that. If you are working on aircraft or racing motorcars (and you wouldn't be using Whit, or UNC :D) where the fits are tighter, the 55° and 60° would matter. |
Graham L (2) | ||
| 157219 | 2003-09-05 03:56:00 | The hex size of the head and nut should be the same outside, although I can't quite remember, all I know is a 1/2" UNC Nut is 3/4" AF. Well you would use a 3/4" Socket to fit on it and I'm sure the hex head of the bolt was the same. I know that Imperial sized bolts will require imperial sized sockets and metric bolts require metric sockets although, you can get away with some, but you'll round off the edges of the bolt or socket. I discovered that 55 deg and 60 deg do matter with UNC/BSW, a BSW nut would only get to about 1/2 way down a UNC bolt before you have difficulty. Although we stocked different types of bolts/setscrews most people only needed enough to fasten the bolt to whatever you were trying to fasten it to, so the nut didn't need to go all the way down. I guess it's different if you were going to screw the bolt into an already threaded hole, but if it was BSW we'd tell them to tap it if possible because I remember I spent all day looking for BSW and BSF threaded bolts and the suppliers basically told me to give up while I was ahead, they also asked me if I called them first, and always say yes but I may have called about 3 or 4 different places at the time, they just like to be known as the first supplier you tried :P |
Kame (312) | ||
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