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๐ง Lock in precision, unlock your potential!
The NACX Ball Plunger set includes 20 high-quality 3mm x 4mm spring plungers crafted from polished 304 stainless steel. Designed for precise positioning, locking, and indexing in mechanical equipment, molds, and automated machinery, these durable plungers offer easy press-in installation and reliable performance favored by professionals and makers alike.































| ASIN | B07TGGBM2L |
| Best Sellers Rank | #71,496 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1 in Metalworking Ball Nose Spring Plungers |
| Brand | NACX |
| Color | Silver |
| Customer Reviews | 4.4 out of 5 stars 83 Reviews |
| Fastener Type | Plunger |
| Finish Type | Polished |
| Finish Types | Polished |
| Item Diameter | 3 millimeters |
| Manufacturer | NACX |
| Model | 77-79 |
| Number Of Items | 20 |
| Number of Pieces | 20 |
| Outside Diameter | 3 millimeters |
| Part Number | 77-79 |
| Pin Type | Spring |
| Pin type | Spring |
| Screw Head Style | Ball |
| Size | 3mm x 4mm |
| Size Name | 3mm x 4mm |
| Unit Count | 20 Count |
O**R
Great for 3D printing
These work well for 3D printed parts such as slide latch lids. The prints do need to be thick enough to support these tiny parts so they don't punch through the plastic.
T**R
Good tolerance.
Exactly as described.
P**.
Pleased with everything.
Unfortunately the ball plungers were not the correct size. I returned them in the unopened package as I could tell that they were to small. The return process was very easy. Thank you for the rapid refund.
J**Y
Great
I use these everyday for one of my products. Never had a problem. Consistent sizes.
C**K
Too small Not the correct size. Nightmare. Stay away
Under no circumstances would I ever use these things again, or anything made by this company. I measured my oiler hole with calipers. It is 6mm. They say these are 6mm. They are not. I put one in and it went right to the bottom of my lathe cross slide. I literally spent almost two days trying to get it out. I had to completely disassemble the lathe cross slide including dropping the cross slide gearbox and removing the drive rods These are a nightmare!! DO NOT USE THESE UNDER ANY CIRCUMSTANCES unless you enjoy colossally wasting your precious time. Even the flange on top which is supposed to keep them from dropping into a hole is way too small
B**.
used in an assembly for manufactured parts
they work fine and plunger is not sticking
M**K
Great quality stainless steel
Great quality thank you
J**F
great value!
Better than I expected.
Trustpilot
2 weeks ago
1 week ago