139-5591 – Toro Grommet Seal, Expansion Fitting (Genuine Toro OEM Part) The Toro 139-5591 Grommet Seal (Expansion Fitting) is a genuine Toro OEM sealing component designed to provide a secure, leak-resistant seal where hoses, tubes, or fittings pass through panels, tanks, or housings. The expansion-style design allows the grommet to seat firmly in the mounting hole, helping prevent fluid leakage, vibration wear, and contamination. Manufactured to Toro original factory specifications, this grommet seal ensures proper fit, material compatibility, and long-term durability in outdoor power equipment applications. Product Details Manufacturer Part Number: 139-5591 Brand: Toro Part Name: Grommet Seal, Expansion Fitting OEM Status: Genuine Toro OEM Condition: New Function & Features Provides a tight seal around expansion fittings or pass-throughs Helps prevent fuel, oil, or fluid leakage (application dependent) Reduces vibration and protects hoses or lines from abrasion Durable rubber material resistant to heat, fuel, and outdoor conditions Direct OEM replacement grommet seal Applications The Toro 139-5591 Grommet Seal is used on select Toro lawn mowers and outdoor power equipment, commonly in fuel, oil, or fluid system pass-through locations where an expansion-style grommet is specified. Exact compatibility depends on model and serial number, and this seal installs where Toro part number 139-5591 is required.
