Insulate the frame. Keep the current where it belongs. Lucky’s Standard Fiber Shoulder Washers are essential for properly insulating electrical components from the metal frame in coil tattoo machines. Designed for use on the rear binding post and contact screw assembly, these washers prevent unwanted grounding that leads to sticking, inconsistency, and machine failure. Proudly made in the USA, these washers are built from durable, non-conductive fiber to ensure electricity flows through your coils—not into the frame. Features Made in the USA – Quality you can trust, built for professional use Electrical Isolation – Prevents grounding to the frame Shoulder Design – Centers screws for proper alignment Durable Fiber Material – Built for repeated installs and adjustments Prevents Machine Issues – Reduces shorting and armature bar sticking Builder Essential – Critical for proper machine function Key Applications Rear Binding Post – Installed top and bottom to isolate the screw from the frame Contact Screw Assembly (Front Binding Post) – Prevents current from shorting through the frame Technical Specifications Type: Shoulder Washer Size: Standard / Small Material: Fiber (non-conductive) Hole Size: #8 (fits 8-32 hardware) Outer Diameter (OD): 0.375" Function: Electrical insulation, spacing, alignment Placement: Frame (binding posts and contact screw assembly) Colors Available: Black, Grey, Red Country of Origin: USA Compatibility: Coil tattoo machines Assembly Tips Install on both sides of the frame at the rear binding post Pair with a metal washer to prevent compression damage Do not overtighten—maintain insulation integrity Ensure full isolation so current flows through coils only Why It Matters Without proper insulation, current can short directly to the frame—causing inconsistent performance or machine failure. Shoulder washers eliminate that risk and keep your machine running clean and reliable.
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