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MTM Hydro 3/8" FKM O-Rings - 100 Pack

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39 In Stock 39 In Stock Sign in to Buy


MTM Hydro's O-Rings will fit in any 1/4"" or 3/8"" coupler in the U.S. Market. We, alone, sell well over 100,000 O-rings per year as this item is commonly (and accidentally) blown out at the worst of times. From amatuers to contract cleaners, everybody blows out O-rings, the difference is that the Pro's always have a few spare O-Rings in the truck.

As a Wholesaler, we recieve these by the thousands and offer them in 25 and 100 packs only.

Dont get caught without a few extra O-Rings on the job as these little items make a big difference in maintaining PSI, GPM, and safety.

Types of O-Rings:

  • Buna Nitril is a common and inexpensive compound used in the O-Rings of all MTM Hydro Brass Couplers. This compound will perform acceptably at high temperatures but will deteriorate quickly and should only be used in cold water applications.
  • FKM (Fluro-Elastomer) is a more expensive and durable compound meant for Hot Water and performs well with Chemical applications. Use the FKM Series of O-rings for replacement on Stainless Steel Fittings.
  • EDPM is more expensive and durable compound that performs well with Hot water but excellently with Chemical Applications. All MTM Hydro Stainless Steel Couplers have EDPM O-Rings, although we do not sell replacements; instead, replace with FKM.
  • Specifications