The factory lug I removed from my accustock measured 0.187. I ordered the PTG 4140 stainless steel , but had to grind the sides and center to accommodate the recoil lug slot. There is a center rail in the slot that requires some changes to the lug. It seemed like a better option than trying to fit the aluminum bedding to the lug. Ref number I bought was 5beba80c. With my below average skills with a file and polishing bits, the job took about 2hrs. I could not find an aftermarket lug that was as short as the factory lug. If it would help, I can email a pic of the lug after grinding to fit.