Set of 5 terminal metal screws
Specifications
- Weight
- 6 g
- Length
- 15 mm
- Thickness
- 3 mm
- Quantity
- 5 pcs
- Material
- Brass, copper or steel
- Use
- Fixing tattoo machine terminal
Ghiduri utile:Întreținerea mașinii de tatuatÎntreținerea mașinii de tatuat: piesele de schimb esențialeDe ce zăngăne sau vibrează anormal mașina de tatuat: cauze mecanice și remedii
Guide & full description
Complete guide: Set of 5 terminal metal screws
A set of 5 spare metal screws for the binding posts of coil tattoo machines, 15 mm long and 3 mm thick. Their role is twofold: they mechanically secure the terminal to the machine frame and ensure the electrical contact through which current flows from the power supply to the coils, while also preventing the contact screw from loosening. It is an essential service part for any artist working with coil machines — a worn or oxidized terminal screw is often the real cause of a jerky operation that seems like a major malfunction. With 2 terminal screws per machine, the set covers 2 machines plus a spare.
How to use
- Disconnect the machine from the power supply and remove the clip cord before any intervention.
- Unscrew the terminal nut and remove the terminal together with the old screw.
- Clean the mounting hole and contact surfaces of oxidation or residue.
- Insert the new screw through the frame, with the insulating element if the machine's assembly requires it.
- Mount the terminal on the screw and tighten the nut firmly, but without excess — the thread can deform.
- Reconnect the clip cord and check the electrical contact by testing the machine before working on a client.
Tips from us
- Do not wait for complete failure: if the machine runs jerkily, the terminal heats up, or power drops at the same power supply setting, first check the terminal screws — it's the cheapest possible repair.
- Clean the contact surface with isopropyl alcohol at every session and periodically check the tightness, because machine vibrations gradually loosen the connection.
- Inspect the thread at every service operation: a screw that no longer tightens firmly must be replaced, not forced.
- Also evaluate the condition of the terminals when changing the screws — if both components are worn, replacing the entire assembly gives the most stable connection.
- Keep the spare parts from the set in your service kit: a screw replaced on the spot can save you a scheduled session.
Frequently asked questions
Are they compatible with any tattoo machine?▾
The screws have standard dimensions (15 mm length, 3 mm thickness) with a calibrated thread for the holes in the frame of conventional coil machines, so they fit most of them. For custom or boutique machines with non-standard specifications, check the dimensions before ordering. Caution: rotary machines with RCA connectors do not use this type of screw — the set is strictly for coil machines.
How do I know when the terminal screws need to be replaced?▾
Typical symptoms are: the machine runs intermittently or jerks, the terminal visibly heats up, power drops at the same power supply setting, and the terminal unscrews on its own under vibration. On inspection, look for worn thread that no longer tightens firmly, oxidized contact surface, deformed screw head, or advanced corrosion. Any of these signs justify replacement — it's an inexpensive part that solves problems that seem like major malfunctions.
How many screws do I need for one machine and how far does the set go?▾
A standard coil machine has 2 terminals (positive and negative), each secured with one screw — so 2 screws per machine. The set of 5 pieces equips 2 machines and leaves you with one spare part, or covers multiple successive replacements on the same machine over time.
Why does the screw material matter? Can't I use any screw from the hardware store?▾
Because the terminal screw is part of the machine's electrical circuit, it's not just a simple fastening part. A poorly conductive material creates electrical resistance at the contact point, which means power loss, heating, and reduced performance. Terminal screws are made from brass, copper, or steel with a conductive protective coating (nickel, zinc, or chrome), combining good electrical conductivity with the mechanical strength needed for a firm tightening.
How do I maintain the terminal screws to make them last as long as possible?▾
Clean the contact surface with isopropyl alcohol at every session, periodically check the tightness, and inspect the thread at each service. Do not overtighten — you risk deforming the thread. Regular maintenance significantly extends the lifespan of both the screws and the terminals, and maintains a stable electrical connection.
Do I need to replace the terminals along with the screws?▾
Not necessarily. If the terminals are in good condition — intact thread, clean contact surface, no deformation — replacing only the screws is sufficient. However, if the terminals also show wear, replacing the entire assembly (terminals + screws) at the same time ensures the best performance. Evaluate the condition of each component individually at every service.
Product description
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