Upgrade and protect your audio equipment with these precision-made replacement jack nuts designed specifically for Roland 1/4" input jacks (#17041657). Engineered for compatibility with many Roland keyboard and guitar amplifiers—including popular AC-60 and Micro Cube models—these nuts ensure a tight, stable jack connection that keeps your cables secure during any session. Each piece features highly non-standard M12x1 threading that matches the original factory specifications, allowing for a perfect, tool-free installation. The deep-set design grips 1/4" cables firmly, reducing the risk of accidental unplugging or signal loss whether you're performing live, recording, or practicing at home. In addition to Roland equipment, these nuts are also compatible with Jalco I/O jacks commonly found in 1990s ZOOM processors such as the 9030 and 9050—making them a versatile upgrade for a variety of audio devices. Crafted from high-strength premium material using advanced 3D printing technology, these jack nuts deliver outstanding durability, long life, and dependable performance in any environment. This 3D print file was created by Thingiverse user vdub6127