951739
Lubricating Nipple (Grease Fitting)
Volvo

A lubricating nipple, commonly referred to as a grease fitting, is a compact, high-demand component that provides a precise lubrication point for moving metal parts on heavy-duty Volvo trucks. This fitting is threaded for secure attachment and designed to accept a standard grease gun, delivering lubricant directly to bearings, linkages, and pivot points that endure high loads and constant movement. In practice, it ensures that critical joints—such as steering knuckles, suspension pivots, and U-joints—receive periodic lubrication without disassembling components. The result is reduced friction, minimized wear, and extended service life, even in harsh operating conditions such as fluctuating temperatures, moisture exposure, and road debris. High-quality grease fittings maintain a clean seal to prevent dirt ingress and grease leakage, which protects the lubrication circuit and helps maintain consistent performance. Proper maintenance with the correct grease type and grease gun nozzle is essential to prevent binding or over-pressurization that could compromise seals. In mission-critical fleets, reliable nipples contribute to lower maintenance costs and fewer roadside issues. Source One Parts Center highlights the importance of using the right size and thread pitch to ensure a leak-free, durable fit.