Please refer to the Images above and Product Specifications below to Ensure a proper fit. PRODUCT NUMBER AND VARIATIONS: 136-8684, 136 8684, 1368684 PRODUCT TYPE: Hex Head Bolt SIZE: Common Thread Type 3/8 x 1 1/4 - 16 NOTES & DETAILS: TORO OEM 136-8684 IS COMMINLY USED - Powerlite & Powerclear Snowblower Models - Installed on the Engine side of the Idler Pulley Tensioner Arm and travels through the Idler Arm - Retains the Idler Pulley to the Idler Pulley Tensioner Arm Titan & Titan Max Models - Retain the Hydraulic Pump Spanner Plate to the Hydraulic Pump - Used only in the Back or Rear Most Wholes and installed from the inside tabs of the Spanner Plate and Installed Outwards through the Hydraulic Pump Fastner Tabs. COMMON SERIES APPLICATIONS: Toro Select 21" Power Clear & Powerlite Snowblower Models - Titan & Titan Max Models (Models Only with I-Beam Framing) MODEL FIT CHART: 38274, 38474, 38475, 76420, 76425, 76530, 76635, 07369, 76606, 76607, 76610, 76608, 76609, 76448, 76554, 76660