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+1 (217) 579-8045Shop J.W. Winco 903-40-M12-34-ST and trust MRO to be your reliable J.W. Winco supplier. Trusted since 1898. Fast, Free Shipping. GN 903 spindle assemblies are an economical choice for use with various toggle clamps that require manual clamping height adjustments on even or uneven surfaces. Toggle screw swivels up to 15 degrees in any direction. Plastic thrust pad can be easily detached from and reassembled to screw. The hexagon nuts are included.