# Connecting Base and Lid (advanced)

// n(g) = {yappSelfThreading} : Make the insert self threading specify the Screw Diameter in the insertDiameter

<figure><img src="https://832938294-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FcI46RW7gXIHinmkl2pBq%2Fuploads%2FW1uGLRX1tBdYY6rbYWnq%2Fimage.png?alt=media&#x26;token=564a5d9d-1aba-4fd5-8453-ee684b99d5a5" alt=""><figcaption><p>Self Threading insert on 1,3 2,4 are standard inserts</p></figcaption></figure>