Solid Inserts used to plug holes and allows user to make their own new threaded hole.
Carbon Steel Inserts – C1215 or Equivalent | Stainless Steel Inserts – 303 CRES
Keys – 302 CRES
Carbon Steel – Zinc Phosphate | Stainless Steel – Passivated
Tolerances: ±.010 inch or ±.25 mm unless specified otherwise.
Internal Threads: Per SAE AS8879
Dimensions: Are in inches except metric inserts are in millimeters
Keys: Inserts with an external thread size of 7/16 or M 12 and larger have 4 locking keys. Smaller sizes have 2 locking keys.
Material Identification Mark: None