GRACO Washer, Back-Up - (SKU: 178163) high-viscosity coatings and handling the

high-viscosity coatings and handling the toughest protective coatings

Used in vehicle service and industrial fluid handling systems for lubrication

Used in GRACO paint sprayer equipment to secure and seal internal components

Engage the trigger lock and verify its function before operating the equipment

The GRACO 17W150 is a left-hand threaded jam nut

GRACO Washer, Back-Up - (SKU: 178163) high-viscosity coatings and handling theThe GRACO 178163 Washer, Back Up is a replacement part designed for use in GRACO equipment, specifically within the Power Flo Pumps series. It is a washer component that provides support and sealing functions within the pump assembly. The material is not specified in available sources, but it is typically made from durable metals or engineered plastics to withstand operational stresses. Its intended use is to ensure proper alignment and sealing of