Standard Grease Fittings (Zerk-Style) for Machine Lubrication Systems

Brief Overview

These are essential components for any industrial lubrication system. The fittings feature a male threaded cylindrical base with a hexagonal wrench flat and a ball-valve dome tip—the standard configuration for centralized greasing across manufacturing equipment, CNC machines, and heavy industrial applications. The chromate-plated finish provides reliable corrosion resistance in shop environments. Stock these alongside compatible flexible hose assemblies to offer customers a complete lubrication solution.

Key Features

• Ball-Valve Design: Integrated check valve prevents grease backflow and contamination ingress, ensuring clean lubrication delivery
• Hexagonal Wrench Flat: Allows secure hand-tightening and prevents rotation during installation or service
• Threaded Cylindrical Base: Male threads for direct installation into machine castings and equipment housings
• Chromate-Plated Finish: Yellow-green protective coating resists corrosion and extends service life in industrial environments
• Standardized Configuration: Compatible with industry-standard grease guns and centralized lubrication systems
• Compact Dome Tip: Minimalist design reduces interference with adjacent components

Why Resellers Choose These Fittings

High Inventory Turnover: Grease fittings are consumable-level wear items—machines require periodic replacement as fittings wear or become clogged. This drives regular reorders from your customer base.

Margin-Friendly Bundling: Pair these with alternative fitting specifications and hose assemblies to create tiered lubrication kits. Customers buying one fitting often need multiples—capitalize on volume purchases.

Essential for Equipment Setup: Any shop performing machine installation, rebuild, or preventive maintenance schedules needs fittings in stock. Position these as a non-negotiable supply item.

Low Cost, High Value Perception: Inexpensive per-unit, yet customers perceive them as critical to equipment longevity. Excellent margin on volume orders.

Technical Specifications

Specification	Details
Connection Type	Male threaded cylindrical base
Head Style	Ball-valve dome with central lubrication inlet
Wrench Interface	Hexagonal flat for secure tightening
Valve Function	Integrated check valve prevents backflow
Finish	Chromate plated (corrosion-resistant)
Color	Yellow-green iridescent plating
Application	Centralized machine lubrication systems
Compatibility	Standard grease gun fittings

Real-World Application Context

These fittings are installed directly into machine castings—lathes, mills, presses, and conveyors—wherever centralized greasing is required. Mechanics use a standard grease gun to inject lubricant through the fitting into internal bearing races and sliding surfaces. The ball valve prevents air and contaminants from entering the bearing cavity between lubrication cycles. Over time, fittings become clogged with dried grease residue or stripped threads, requiring replacement. This makes them a reliable, recurring revenue item for distributors.

Stock Recommendation

Order in assorted quantities to match your customer base's equipment mix. Offer multiple fitting configurations to accommodate different thread sizes and installation angles—customers will appreciate the convenience of sourcing alternatives from one supplier.