Used
knobs do not come with screws unless by chance the switch
was bad as the screw stays with the switch.
Any
of the 68-70 knobs that are held on by a clamping screw
are interchangeable. The 67 1/2's have a different shape
then the later knobs. The 68-69 knobs have a word
description on them while the true 70 knobs usually have
a drawing. If the listing shows all the 68-70 codes or
shows "68-70" that knob was originally the same for all
three years. In some cases there are some "option" knobs
listed. These were not optional original knobs, they are
current knobs that Nissan manufactures that are not
correct but are more economical and/or available. For
instance, Nissan superceded the 67.5-69 throttle knobs by
the 70 style knobs in the 70s.
There
are two different screws that are used on Nissan knobs.
So many of the switches and cables have had the wrong
screw put in them it may be difficult to use the correct
screw anymore.
Used
Knobs are useable as they are. These are not restored
knobs, you would have to shine them up and repaint
letters as necessary. You have to bring up your modeling
skills you had as a kid to get paint in those tiny lines!
They would not be broken, but it is not uncommon to see
surface stress lines in old knobs. To us a "cracked" knob
is different then one with "stress" lines. In our version
of definition semantics, when a knob is cracked you can
make the two pieces move, as if it is about to break. If
knob does not meet this description, if you ship it back
within 3 days the part is 100% refundable for the cost of
the part (not the shipping). And don't hesitate to drop
us an email if you have questions about used parts, or
ask for a picture.