I prefer Union Special Tech keystone jacks, but holy crap they are hard to find in the US! For their shielded jacks, they have a little lock ring that locks the cable down tight (strain relief), and provides an awesome ground. That strain relief looks like this http://www.netkey.ru/content/img/wmc_pictures/2008/9/img/kj2-c6-sh-f-wh.jpg
That model is KJ2-C5E-FS, and I am having an extremely difficult time finding it. I have found these in the past for around $1 ea. All I am finding now are these crappy ones that I can't stand for around $2-3 ea. https://www.firefold.com/cat5e-keystone-jack-110-shielded?gclid=CIztiaGOrsgCFc-FfgodwGsLwg What are you guys using for shielded keystone jacks? Any good sources for them at reasonable prices? I am looking to buy 1000. I have contacted the manufacturer in Taiwan on multiple occasions and do not get a reply.
