Loctite 222MS Low Strength Threadlocker 50ml is a military-grade, purple anaerobic threadlocking adhesive engineered for locking and sealing small-diameter threaded fasteners (up to 1/4" or 6mm). Formulated with controlled lubricity for precise clamp loads, Loctite 222MS prevents fastener loosening and leakage caused by shock and vibration while allowing easy disassembly using standard hand tools without shearing soft or small screws.
Key Features & Industrial Applications
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Controlled Low Strength: Ideal for small fasteners, adjustment screws, countersunk head screws, set screws, collars, pulleys, and controllers where regular disassembly is required.
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Substrate Compatibility: Suitable for all metals, including low-strength soft metals such as aluminum and brass.
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Thixotropic Viscosity: Prevents liquid migration after application to substrates, ensuring clean, targeted application.
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Military & NSF Certified: Tested to military specification Mil-S-46163A Type II Grade M, compliant with ASTM D5363, and registered to NSF Category P1 for indirect contact in food processing areas.
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Vibration & Shock Resistance: Cures in the absence of air when confined between close-fitting metal surfaces to create a durable, sealed unit.
Technical Specifications
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Brand & Part Number: LOCTITE® 222MS™
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Strength: Low Strength
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Color: Purple
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Curing Type: Anaerobic
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Viscosity: 1,200 – 5,000 mPa·s (Thixotropic)
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Temperature Range: -65°F to 300°F (-54°C to 149°C)
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Recommended Fastener Size: Up to 1/4" (6 mm) diameter
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Package Size: 50 ml
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Compliance & Certifications: Mil-S-46163A Type II Grade M, ASTM D5363, NSF P1 Certified
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Recommended Surface Preparation: Surface degreasing with [Link to: Industrial Cleaning Solvents] and optional surface acceleration using Activator SF 7471 for inactive metals.
Frequently Asked Questions
What is Loctite 222MS used for?
Loctite 222MS is used for locking and sealing small threaded fasteners (up to 1/4" / 6mm in diameter) that require routine adjustment or easy disassembly using standard hand tools. Common applications include set screws, adjustment screws, pulleys, and components made from soft metals like aluminum or brass.
What is the difference between Loctite 222 and Loctite 222MS?
Loctite 222MS meets Military Specification Mil-S-46163A (Type II, Grade M) requirements and ASTM D5363 standards, making it the preferred choice for defense, aerospace, and regulated industrial manufacturing environments requiring strict specification compliance.
How do you remove fasteners locked with Loctite 222MS?
Fasteners secured with Loctite 222MS can be disassembled using standard hand tools. In cases with long thread engagement, localized heating up to 250°C can be applied to facilitate disassembly while warm.
Is Loctite 222MS compatible with active and inactive metals?
Yes. Loctite 222MS cures reliably on active metals like steel and copper. For inactive metals such as stainless steel, plated parts, or cold temperature applications, applying an anaerobic activator (such as Loctite SF 7471 or SF 7649) accelerates cure speed.
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