APM’s new, patented, pre-assembled self-sealing fasteners provide both fastening and sealing integrity in a single unit. The design features an o-ring held captive in a precision engineered groove under the head. Vibration-resistant and reusable machine screws, rivets, bolts and nuts withstand internal and external pressures/vacuum to 414bar. Seeloc washers are self-sealing, vibration-resistant washers, each having a silicone rubber section, molded and bonded to a stainless steel formed washer. APM’s self-sealing fasteners provide positive sealing under vacuum or pressure, install like a conventional fastener and are reusable and compatible with all surface finishes. Among the typical applications: are fuel tanks, pressure gauges, gear/transmission boxes, valves, motor housings, instrument and communication gear housings, portable instruments, military equipment, food processing systems, and any application where both fastening and sealing are required.