MIG Welding Contact Tips 15AK Review
A contact tip that does not match your wire or gun can cause rough feeding, burnback, extra spatter, and an unstable arc. The Welding Knight MIG Welding Contact Tips 15AK reviewed here are the 0.035-inch (0.9 mm), 30-pack variant with a 24 mm body and M6 thread. They offer a practical supply of copper replacement tips for compatible MB15, 15AK, and listed 11-35-style setups. Their main strength is the bulk quantity, but fit is not universal, so you need to verify the thread, length, wire bore, and torch consumable system before ordering.
Quick Verdict
Quick Verdict
Rating: 8.2/10, recommended with compatibility caveats
Best For: Welders who use 0.035-inch wire and a compatible 24 mm, M6, 15AK or 11-35-style contact-tip system.
Bottom Line: The 30-pack gives you a useful supply of copper tips for routine replacement and longer shop projects. The tradeoff is that the 15AK label alone does not guarantee fit, so compare one of your current tips with the listed dimensions before buying.
Key Specifications
| Specification | Detail |
|---|---|
| Brand | Welding Knight |
| Product | MIG Welding Contact Tips 15AK |
| Product Type | Replacement MIG/MAG welding contact tips |
| Reviewed Variant | 0.035 inch (0.9 mm) |
| Package Quantity | 30 contact tips |
| Tip Style | 15AK / MB15 / 11-35-style replacement tip |
| Length | 24 mm (about 0.945 inch) |
| Thread Size | M6 |
| Material | Copper |
| Listed Compatibility | Selected 14AK/15AK, MB15, Lincoln Magnum 100L, Tweco No.1, and Mini MIG-style guns that use matching dimensions |
| Best Use | Routine replacement when welding with compatible 0.035-inch wire setups |
| Package Note | Confirm the selected wire-size and pack-count variant on the product page before checkout |
| Warranty | Not clearly stated in the verified listing information |
| Amazon ASIN | B0CQR6J3HQ |
What Is the Welding Knight 15AK Contact Tip Pack?
This product is a bulk set of copper contact tips for compatible MIG and MAG welding guns. The contact tip sits inside the nozzle area, guides the welding wire, and transfers welding current to the wire as it feeds toward the joint. Because the wire passes through a close-fitting bore, the tip size must match the wire diameter.
The reviewed variant contains 30 tips sized for 0.035-inch (0.9 mm) wire. Each tip is listed as 24 mm long with an M6 thread. This combination is intended for selected 15AK, MB15, and 11-35-style consumable systems, including some guns described as compatible with Lincoln Magnum 100L and Tweco No.1 patterns.
Who Should Buy It?
Best For
- Welders using 0.035-inch wire with a gun that accepts 24 mm M6 contact tips
- Home shops and repair work where keeping several replacement tips nearby reduces downtime
- Buyers who have already compared the current tip, torch manual, and wire-size marking
Skip If
- Your gun uses a different thread, tip length, or proprietary consumable system
- You weld with 0.023, 0.030, 0.040, or 0.045-inch wire and need a matching bore size
- You prefer manufacturer-branded consumables with model-specific fit documentation
Before You Buy: Do not rely on the words “15AK compatible” by themselves. Remove and measure your current tip, confirm the M6 thread and 24 mm length, and verify that your wire is 0.035 inch (0.9 mm).
Feature-by-Feature Review
Copper Construction and Current Transfer
Copper is a standard contact-tip material because it conducts welding current while allowing the wire to feed through the center bore. In a correctly matched setup, solid contact between the tip and wire supports steadier current transfer. The material also has to handle heat, spatter, friction, and repeated wire movement, so every tip remains a consumable rather than a permanent torch part.
The bulk pack is useful because tip wear can appear as an enlarged bore, burnback damage, a blocked opening, or rough wire movement. Replacing a worn tip is often faster than trying to restore one that has become distorted or fused to the wire.
24 mm Length and M6 Thread
The 24 mm body and M6 thread are the most important fit details after wire size. A tip that is too long, too short, or threaded differently may sit at the wrong position inside the nozzle or may not install at all. Compare the full length and thread diameter with your existing consumable before you assume the pack will fit.
0.035-Inch Bore and 30-Pack Quantity
The reviewed tips are intended for 0.035-inch (0.9 mm) welding wire. A bore that is too small can restrict feeding, while a bore that is too large may reduce electrical contact and contribute to an inconsistent arc. The 30-piece quantity suits welders who want spares for maintenance, repeated repair jobs, or several compatible guns.
Amazon listings can expose different size or quantity choices under one product page. Check that the selected option still shows 0.035 inch and 30 pieces before you place the order.
Compatibility With Selected MIG/MAG Torches
The listing associates these tips with 14AK/15AK, MB15, Lincoln Magnum 100L, Tweco No.1, and Mini MIG-style guns. That is useful as a starting point, not a universal guarantee. Similar-looking torches can use different diffusers, thread systems, or tip lengths.
For comparison, Lincoln Electric identifies KP11-35 as a 0.035-inch contact tip for Magnum 100L guns. You can review the manufacturer’s Magnum 100L consumable information, then compare it with your actual gun and current tip.
Compatibility and Safety
Turn off and unplug the welder before working on the gun. Let the nozzle, diffuser, and contact tip cool, because these parts can stay hot after welding. Wear appropriate welding PPE during use, and follow your welder and gun manuals for consumable replacement.
Install only a tip that matches the wire diameter and threads smoothly into the diffuser. Do not force a mismatched thread or overtighten the tip. If the new tip does not seat like the old one, stop and recheck the part number, dimensions, and torch model.
How It Performs in Real Use
For Routine Shop Welding
For a compatible 0.035-inch setup, these tips give you a simple replacement supply for common steel fabrication, repair, and hobby work. A fresh tip can restore proper wire guidance when the old bore has worn, but it will not correct unrelated problems such as poor grounding, damaged liners, incorrect drive-roll pressure, or wrong voltage and wire-speed settings.
For Longer Projects
A 30-pack is convenient when you expect extended welding time or repeated starts and stops. Keeping several tips at the bench means a burnback event or spatter-damaged tip does not have to end the job. Store them in a dry, labeled container so you do not mix the 0.035-inch tips with other sizes.
For Wire-Feed Troubleshooting
Replacing the tip is reasonable when the wire catches at the outlet, the bore is visibly damaged, or the arc changes as the gun moves. If a new tip does not improve feeding, inspect the liner, drive rolls, spool tension, diffuser, and gun cable rather than continuing to replace tips.
For Spares and Multiple Guns
The pack can serve several guns only when each gun uses the same M6, 24 mm, 0.035-inch consumable pattern. Label the storage compartment with the tip size and compatible gun models. This avoids installing a similar-looking tip with the wrong bore or length.
Installation and Use Tips
- Confirm the wire size: Check the spool label and make sure it states 0.035 inch or 0.9 mm.
- Compare the old and new tips: Match the length, M6 thread, shoulder shape, and printed wire-size marking.
- Power down the welder: Unplug the machine and allow the gun consumables to cool before removal.
- Clean the nozzle area: Remove loose spatter without damaging the diffuser or gas openings.
- Thread the tip in gently: Start it by hand and tighten it snugly with the correct tool. Do not force or overtighten it.
- Test wire feeding: After reassembly, feed wire according to the machine manual and watch for smooth movement before welding.
Pro Tip: Keep one unused tip beside your gun’s consumable chart. It gives you a clean reference for length, thread, and bore size when a used tip is worn or covered with spatter.
Pros and Cons
Pros
- Thirty copper tips provide a practical stock of replacement consumables
- Clearly specified 0.035-inch (0.9 mm) bore for matching wire
- 24 mm length and M6 thread make pre-purchase comparison easier
- Listed for several common 15AK, MB15, and 11-35-style gun patterns
- Useful for reducing downtime when a tip wears, clogs, or suffers burnback
Cons
- Compatibility is limited and must be checked against the exact gun and diffuser
- The 0.035-inch bore is wrong for other wire diameters
- Warranty terms are not clearly stated, and selected variants may differ on the listing
Is It Worth the Price?
This pack is best viewed as a value-focused bulk consumable purchase. You get the most value when you already know that your gun uses 24 mm M6 tips for 0.035-inch wire and you replace tips often enough to benefit from a 30-piece supply.
It is less attractive when you are unsure about fit or need only one or two tips. In that case, a smaller manufacturer-branded pack may cost more per tip but provide clearer model-specific documentation. Check the current variant, quantity, seller details, and return terms before deciding.
How It Compares to Alternatives
For a Lincoln Magnum 100L gun, genuine Lincoln KP11-35 tips are the most direct comparison because Lincoln lists them for 0.035-inch wire. Tweco 11-35-style tips and other MB15/15AK M6 tips are also worth comparing when their dimensions match your gun. Genuine parts may offer clearer fit documentation, while this Welding Knight pack focuses on bulk quantity.
The best choice is not the tip with the closest product name. It is the one that matches your wire diameter, thread, overall length, diffuser, and torch manual.
Frequently Asked Questions
Will these contact tips fit every MIG welder?
No. They are 24 mm tips with an M6 thread and a 0.035-inch bore. Confirm those measurements and your gun’s consumable system before buying.
What wire size are these tips made for?
The reviewed variant is for 0.035-inch, or 0.9 mm, wire. Do not use the tip as a substitute for a 0.023, 0.030, 0.040, or 0.045-inch tip.
How many contact tips are included?
The reviewed option is a 30-pack. Check the selected size and quantity on Amazon before checkout because product pages can include multiple variants.
How do I know when a contact tip needs replacement?
Replace it when the bore is enlarged, blocked, visibly damaged, or fused to the wire. Rough feeding, repeated burnback, extra spatter, or an arc that changes as the gun moves can also point to tip wear.
Can I use these tips for aluminum wire?
The pack is listed by wire size, not as an aluminum-specific tip. Aluminum setups can require different tip clearance, liners, drive rolls, and feeding equipment, so follow the welder and gun manufacturer’s guidance before use.
How tight should the contact tip be?
Thread it in by hand first, then tighten it snugly with the correct tool after the gun has cooled and the welder is unplugged. Do not force a thread that does not start cleanly or overtighten the tip.
Can cleaning extend the life of a contact tip?
Keeping the nozzle area free of loose spatter can reduce blockage around the consumables. Replace a tip with a damaged or enlarged bore instead of scraping or drilling it, which can change the wire clearance.
What warranty comes with this contact-tip pack?
A specific manufacturer warranty was not clearly confirmed in the available listing information. Review the current seller, return policy, and warranty details on Amazon before ordering.
The Bottom Line
The Welding Knight 15AK contact-tip pack is a sensible buy when you need a bulk supply of 0.035-inch copper tips with a 24 mm body and M6 thread. Buy it after confirming your gun and diffuser match those details; skip it if you need another wire bore, a different thread system, or manufacturer-certified fit. Its strongest feature is the 30-piece quantity, while its main limitation is compatibility that must be checked by the buyer.
Ready to Buy?
Confirm the 0.035-inch, 30-pack variant and check the latest product details before you decide.
