General-purpose threaded inserts with a thick, heavy-duty thread wall, suitable for most applications. Key Inserts are ideal for thread reinforcement, especially when the mating stud or bolt will be removed frequently. They provide strong, permanent steel threads in almost any parent material – ferrous, non-ferrous, or non-metallic. Key Inserts are also well suited for quick repair of stripped, damaged, or worn threads. Locking keys positively prevent the insert from rotating.
Heavy-duty steel Key Inserts are available in a wide range of inch and metric ID thread sizes. The following metric sizes are shown on this page:
M16 to M24 Metric Coarse
M16x1.5 to M24x2 Metric Fine
Please note, metric sizes smaller than those above are available only in stainless steel (see Related Products below):
M5 to M12 Metric Coarse
M8x1 to M12x1.25 Metric Fine
Key Inserts are installed using standard drills and taps, but the required tap-drill size is slightly larger than normal for that OD thread size. See Installation Data table below for the appropriate tap-drill size.