This adapter is M8X.75 to 1/2-28. The adapter can mount any 1/2-28 threaded accessory. Manufactured on a precision CNC turning center in one turning operation to maintain concentricity. Buy direct from the manufacturer and save! Black Oxide finish. Comes with FREE THREAD PROTECTOR!!!! Install each time your accessories are not in use to protect your threads. PLEASE NOTE: we have two M8X.75 to 1/2-28 adapters so be sure to purchase the right one to fit your needs. Email me if you have any questions, thank you.