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[M8 X 1.25 THREAD] Designed with standard M8 thread and 1.25mm pitch to suit common bolts studs and machine screws helping create a secure straight connection in repair and assembly work. [ZINC PLATED STEEL] Made from carbon steel with a galvanised zinc plated finish this coupling nut offers solid strength and improved rust resistance making it suitable for dry indoor daily use. [40MM LONG DESIGN] The M8x40 body gives deeper thread engagement than shorter nuts helping join two threaded parts more securely while supporting maintenance machinery fitting and tasks. [HEX SHAPE GRIP] The 6 sided hexagonal profile is easy to hold and tighten with standard tools giving convenient installation for beginners and experienced users in home workshop or office repairs. [10 PIECE PACK] Supplied as a practical set of 10 coupling nuts ideal as replacement fasteners for communication equipment ship assembly woodworking maintenance and general mechanical applications.