Looking for something different for your artisanal amp project? This super cool brown phenolic socket from China will fit the bill. The gold plated contacts are machined, not stamped, so the contact integrity is superb, like the Japan manufactured Yamamoto audiophile sockets of yore. The pin type contact posts do require a high level of soldering skill so plan accordingly. The Black metal mounting clamp offers both top and bottom positioning. I measured .821" bore hole diameter, 1.228" screw mounting centers.