Female threaded insert GAIMRT8125-1420-11S in Metric style general purpose inserts designed for strength and durability. You can go for Titanium material option that provides 40% weight savings over Stainless.
Specifications for GAIMRT8125-1420-11S:
Minimum Effective ID Thread Depth (mm): 10.00 Overall Length (mm): 14.25 Head Dia (mm): 18.00 Head Thick-ness (mm): 3.25
For more details, check: http://fredsert.com/standard-fredserts/female-metric/