linty wrote:for kwikset it might because their 6 pin keys have offset top and bottom shoulders. The 5 pin locks use the top shoulder and the 6 pin locks use the bottom shoulder so a 6 pin key lines up for both.
Generally a 6 pin bump key won't work in a 5 pin lock because there is no room for it to go further into the lock. The cap or back of the lock will stop.
kw1 = standard kwikset keyblank (ilco#: 1176)
kw5 = 6-pin kwikset keyblank (ilco#: a1176 ?? i don't recall exactly.)
kw10 = kwikset "titan" keyblank (ilco#: a1176st)
more often than not, a titan keyblank will work in applications that normally take a kw1. the main difference between a kw10 and a kw5 keyblank are the offset stops. on a titan, the upper stop is forward and the lower stop is back.