Castrol BRAYCOTE-646(1-QT-CAN)

Additional Product Information

Overview

Castrol Braycote 646 is a semi-fluid, lithium stearate thickened synthetic grease engineered for precision lubrication under extreme pressure conditions. Widely used in aviation and MRO settings, it ensures reliable operation of automatic weapons and small gearboxes where thin-film lubrication is critical. Maintenance teams rely on its superior oxidation resistance, anti-wear properties, and corrosion protection to maintain equipment readiness and reduce downtime.

Key Technical Specs for Castrol Braycote 646

• Type: Semi-fluid, lithium stearate thickened synthetic grease
• Color: Light tan
• Viscosity/Consistency: Kinematic viscosity 12.2 cSt @ 40 C, 9,100 cSt @ -54 C; Worked penetration 365 385 (0.1 mm-1)
• Service Temperature: -54 C to 127 C (-65 F to 260 F)
• Extreme Pressure Load: Incipient Seizure Load 80 kg, Welding Load 160 kg
• Rust & Corrosion Protection: Passes copper strip corrosion, 400-hour humidity cabinet testing
• Evaporation Loss: 1.1% @ 149 C (8 hours)
• Typical Uses: Automatic weapons (M16, M61, M39), small gearboxes, precision mechanisms, narrow lubrication channels
• Shelf Life: Subject to standard manufacturing tolerances; store in cool, dry conditions

Approvals & Specifications

• MIL-L-46000 Qualified
• Military Symbol: LSA
• NATO Code: O-158

Typical Aircraft MRO / AOG Applications

• Precision lubrication of small gearboxes and actuators
• Maintenance of thin-film lubricated control mechanisms
• Emergency AOG repairs requiring reliable low-temperature operation
• Protecting critical components from wear and corrosion during service intervals

Compatibility & Safety Notes

• May soften certain paints; test or use compatible coatings
• Adversely affects natural rubber; use compatible seals and gaskets
• Use personal protective equipment (PPE) when handling; avoid ingestion or contact with skin and eyes
• Not suitable for food-contact surfaces or food-processing equipment

Packaging & Procurement

• Available in bulk and serviceable pack sizes for field and depot use
• Storage: Keep container tightly closed, cool, and dry
• Ease of use: Semi-fluid consistency allows pumping through narrow orifices

Why Castrol Braycote 646 is Chosen for AOG / MRO

• Provides rapid and reliable lubrication in high-pressure applications
• Maintains performance under extreme temperatures and conditions
• Versatile for multiple aircraft systems and precision equipment
• Supports rapid turnaround in emergency AOG scenarios

Practical Suggestions for Your Team (AOG Mindset)

• Stock sufficient quantities to cover emergency and scheduled maintenance
• Use compatible tools and pumps for narrow orifice applications
• Train personnel on proper handling, PPE usage, and contamination avoidance
• Rotate stock to maintain product integrity over time

Manufacture / Aviation Spec Codes

• Manufacturer: Castrol
• Product ID: Braycote 646
• MIL/OEM Codes: MIL-L-46000, LSA, NATO O-158

Alternative Names & Descriptions

• Braycote 646 Grease
• Castrol Military-Grade Semi-Fluid Grease
• LSA / NATO O-158 Lubricant
• Automatic Weapons Thin-Film Lubricant
• Precision Gearbox Grease, Light Tan