Self-tapping threaded insert M12x1.75 to M10x1.5 (L=15 mm) for 45-series aluminium profiles

This threaded insert (thread reducer) is designed for 45-series T-slot aluminium profiles where the profile end is prepared with an M12x1.75 thread. After tapping the M12 thread, you install the insert using a flat-blade screwdriver. Once fitted, it converts the connection to a standard M10x1.5 internal thread, allowing you to use common M10 bolts and accessories on your 45-series builds.

Made from steel with a zinc-plated surface finish, it provides a durable thread interface—especially useful for connections that are assembled and disassembled repeatedly.

Note on coarse vs. fine threads: Metric threads can be coarse (standard pitch) or fine (smaller pitch). Coarse threads are the most common choice in general machine building because they are widely compatible, robust, and easier to source. M12x1.75 and M10x1.5 are the standard metric coarse threads for M12 and M10, and they match the thread sizes used across many other fasteners and accessories we sell on our website—making it easier to standardize your hardware and avoid mix-ups with fine-thread variants (e.g. M12x1.5 or M10x1.5).

Key benefits

• Thread conversion: converts an M12x1.75 end thread into a practical M10x1.5 mounting point
• Standardizes hardware: use M10 fasteners across brackets, feet, casters, hinges, end plates, and more
• Durable steel thread: more wear-resistant than threading directly into aluminium
• Zinc-plated finish: corrosion protection for typical workshop and industrial environments
• Compact size: 15 mm length suits many end connections without adding bulk

Typical applications

• Machine frames & guarding: reliable M10 end fastening for plates, brackets, and covers
• Workstations, racks & carts: mounting levelling feet, casters, bumpers, and handles
• Automation & robotics: standardized M10 attachment points for sensors, cable management, and modules
• Retrofits & repairs: adapt an existing M12 end preparation to M10 components without changing the profile

Installation

1. Tap the profile end to M12x1.75 (in the profile core bore).
2. Place the insert and screw it in using a flat-blade screwdriver until it seats securely.
3. The profile end is now ready for M10x1.5 bolts/studs.

Technical data

• Outer thread: M12 x 1.75
• Inner thread: M10 x 1.5
• Length: 15 mm
• Material: Steel
• Surface finish: Zinc plated
• Compatible profile series: 45-series aluminium profiles (M12 end preparation)