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Self-Sealing Fastening Without Chemistry

From APM Hexseal Corp.

"Dry" embedded O-Ring sealing fastener technology (with optional thread locking) and "wet" liquid adhesive thread
locking, have been the choices for pump manufacturers and users for more than half a century-wherever secure
sealing under pressure as well as fastening has been required. Fluid/gas fastener leakage originating from within,
as well as preventing seepage from external contaminants require a reliable, adjustable sealing barrier -
especially when field servicing and employee health are considered.

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Topics of Interest

For engineers combating vibrational loosening, axial-torsional loading, joint fatigue, and ther mal extremes, conventional fastening methods involving standard 60 degree threads have posed design...

When gas or liquid are under pressure, system fasteners should be sealed to prevent leakage. This is true even for fasteners that are not under pressure, but where hostile environments such as water,...

Inserts are classified as two general types: those held in place by external threads and those that use some means other than threads (knurls, grooves, interference fit) for their holding power.

There are several techniques for joining plastic parts. Equipment cost and labor for each method vary considerably. Most techniques have limits on the sizes and types of plastic that can be joined.

13.1 Introduction The invention of the screw thread is arguably second in importance only to the invention of the wheel. Although there have been many developments in fastening technology since the...