Stat-o-seals are intended to seal on the shank of a bolt, immediately under its head. They are made in one piece, the rubber sealing element being molded directly into a metal retainer.
The Stat-o-seal can be especially useful under flat head rivets of nearly every kind because of relaxing of seating pressure which nearly always occurs after a rivet is upset. This does not alter the effectiveness of a Stat-o-seal.
Most fluid systems have fasteners that must be sealed. Parker’s fastener seal designs found in the Stat-O-Seals® and Thread Seals® feature an elastomeric sealing element molded in place within a metal retainer (washer). Although resembling a simple o-ring groove concept, the mold in place fastener seal offers numerous advantages. Ideal for sealing small and miniature sizes, the Parker Lock-OSeal ® is a two-piece combination seal comprising a separately molded o-ring fitted within a surrounding metal washer. Other speciality fastener seals are also available.