Why does the APM SEELNUT use a bonded elastomeric insert instead ofan embedded O-Ring?
After patenting the original self-sealing fastener (screws, bolts, rivets) design in 1949, featuring an embedded O-Ring in an symmetrical groove located in the underside of the head — our designers then discovered that installing an O-Ring on a sealing-nut would NOT be an optimal solution because of a totally different dynamic. The sealing process requires that the first/second thread be removed to accommodate the sealing mechanism. Initially, that step weakens the gripping power and clamp load of a torqued nut. Simply embedding a conventional O-Ring into the newly made groove does not compensate for the lost strength. In fact, there is a critical secondary problem of O-ring surface damage due to the cutting effect from the sharp thread’s edges. This results in diminished reusability as the O-Ring is now degraded. Instead, our engineers designed a bonded elastomeric (typically silicone) insert which also feature its own threads on the ID surface, providing 100% gripping and sealing and
Related Questions
- How do you compare the APM One-Step Embedded O-Ring Self-Sealing Fastener System to the concept of just adding an O-Ring or washer to a standard screw or bolt?
- How do you compare the use of liquid thread sealants and compounds to embedded O-Ring sealing technology?
- Whats the difference between the Lotus Symphony embedded in Lotus Notes 8 and Lotus Symphony standalone?
