The MK Products 3/64" Spray Contact Tip (part 621-0393-10) is an OEM copper contact tip sized for 3/64" (0.046") solid wire, sold as a 10-pack, and engineered for MK Products Cobra and Python MIG spray-transfer guns — delivering consistent electrical contact and stable arc performance at the wire sizes used in high-deposition spray-arc applications.
| Type | Contact Tip |
|---|---|
| Part Number | 621-0393-10 |
| Compatible With | MK Products Cobra, Python, and compatible MK MIG spray-transfer guns |
| Material | Copper |
| Wire Size | 3/64" (0.046") |
| Tip Style | Spray (threaded) |
| Quantity per Pack | 10-pack |
| Application | Spray-transfer MIG welding with 3/64" (0.046") solid wire on steel and stainless steel |
- High-deposition spray-arc welding: 3/64" wire is a step up from 0.035" in deposition rate — ideal for heavier plate welding where you need more metal per pass without moving to 0.052" wire.
- Structural steel fabrication: Used in beam, column, and connection plate welding where spray-transfer provides superior penetration and a flat bead profile on material 3/16" and thicker.
- Pressure vessel and tank welding: The higher deposition of 3/64" wire in spray mode reduces the number of passes required on thick-section welds.
- Semi-automatic and robotic MIG: Consistent bore tolerance in OEM MK tips ensures stable wire-to-tip contact in continuous production duty cycles.
The 621-0393-10 contact tip is an OEM MK Products part designed for the Cobra and Python MIG gun families using the standard MK threaded spray-tip configuration. The 3/64" bore is specific to 0.046" wire diameter — do not use with 0.035" or 0.052" wire, as incorrect bore sizing causes arc instability and premature tip wear.
Always verify your MK gun model accepts the 621-series spray tips before ordering. If you are unsure, contact WeldingMart support with your gun model number for parts confirmation.
Browse the complete range of contact tips and nozzles at WeldingMart Torch Tips & Nozzles, and explore MK Products MIG guns at MK Products MIG Guns.
WeldingMart is an authorized MK Products distributor stocking the full range of OEM Cobra and Python MIG gun consumables — including both the 0.035" (621-0391-10) and 3/64" (621-0393-10) spray tips. You get factory-spec copper tips engineered to the exact bore and thread dimensions of your MK gun, with fast US shipping and support from welders who know the MK Products line. We carry the full range of MK gun consumables so you can source everything in one order.