S 12.7 X 25.4 X 6.35 PTM-H

Polyacrylate Oil Seal
Polyacrylate compounds are recommended for higher temperature applications, ranging from -13 F to 302 F. They also work well with mineral oils, EP additives and greases, but are very poor in sealing in dry running conditions and cost more then nitrile.  Precision ground OD service with a lead-in chamfer with an additional inner rubber lining. The PTM-H has Hypalon for O.D. sealant.