Quote Originally Posted by nathanbonstein View Post
i thought this 870 was going to be easy to pin ? pins are the old large diameter, .129 and springs are mixed between older .122x.420 and .115.
also a 7 pin cylinder with #7 bottom pin stuck all the way down . i could only feel 6 pins,#7 blocked reaching the 7 th pin to pick.
Are these pins and springs still available ? A yale V blank fits ? Only 6 pins long,
let's see if i can upload pic's that were taken from iphone ?
3 out of 7 i'll try to get some from other phone
See thumbnail for Yale .51 7-pin tumbler blank nomenclature, suffix key section, GST or VYZ families, as RB117VA etc.
See pg. 25 of PDF at the link for .128 diameter (special) pins used only on certain key sections including GK, SK etc. and certain multiple plug sections such as GAH, GBV, GV etc.
https://stuff.mit.edu/afs/sipb/user/jhawk/cyl_keys.pdf
Click image for larger version. 

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Pete Schifferli