Potter & Brumfield built this relay with a sturdy frame, and you can feel it when mounting.
Potter & Brumfield KRP11AG-240 Relay 8 Pin Octal DPDT 10 A 240 VAC
You will find that the Potter & Brumfield sits flat, with even gap on the plastic housing.
A nice touch is the clear Potter & Brumfield labeling, so you know exactly who made it.