On 3/20/2013 4:05 PM, Bob La Londe wrote:
> What is the difference between ER16 and ER16M?
I don't know why, but sometimes my posts don't show up. I hope this one
does as I am re-sending it for the second time.
ER16A is a hex nut. Coarse thread.
ER16UM is a coarse thread "castle" type nut where you need a spanner
wrench made for the nut.
ER16M is a mini nut with a fine thread for close C-C.
There are also special hex mini-nuts with the fine thread.
See these links:
Hex or SLOT nuts (A or UM): http://www.techniksusa.com/metal/pwrctnt.htm
Mini or M: http://www.techniksusa.com/metal/cnaemn.htm
This video shows a UM nut: https://www.youtube.com/watch?v=PzrFefApyQc
This video shows a hex nut: https://www.youtube.com/watch?v=zxstxpvf4zI
This video shows an M nut: https://www.youtube.com/watch?v=Z1Ljr3lH4PI
Of course, these are not all ER16, but you get the point.
ER8 is available in mini or hex-mini
ER11 is available in hex, mini or hex-mini
ER16 is available in hex, mini, slot or hex-mini
ER20 is available in hex, mini, slot or hex-mini
ER25 is available in slot, mini or hex-mini
ER32 is available in slot, or hex-mini
ER40 and ER50 are available in slot only as far as I know.
There are also some special nuts for close C-C coarse thread
applications, but they are made by special vendors only.
ER16 is larger than the ER16M..nuts are smaller as well on the ER16M
as I recall.
The ER16M is for more delicate work and closer entry. Best as I can
recall. I dont see em much except in swiss shops
This may help
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