In summary, APM's patented, pre-assembled self-sealing screws and fasteners provide both fastening and sealing integrity in a single unit. Vibration-resistant and reusable screws, bolts, and nuts withstand internal and external pressures/vacuum to 20,000+ psi. When vibration is an issue, APM offers a full line of self-locking add-ons (pellets, strips, patches). Finally, SEELOC® Washers are self-sealing, vibration-resistant washers, each having a silicone rubber section, molded and bonded to a stainless steel formed washer ideal for large or slotted holes.