SPIROL’s Series 27 and Series 28 Metric Inserts are almost identical to the standard Series 29 and Series 30 Metric Inserts, but with a slightly modified profile to minimize stress in plastic assemblies with a thin walled boss. The Series 27 is symmetrical for ease of orientation, and the headed Series 28 has the exact same body as the Series 27 with the addition of a head to increase the bearing surface for the mating component to prevent jack-out. The Series 27 (symmetrical) and Series 28 (headed) metric Inserts are made-to-order in thread sizes ranging from M2 to M8.
If you would like assistance in selecting the most appropriate Insert for your application, please contact SPIROL for complimentary technical support.