Round Head Groove Pin, Metric Sizes
What Is a Round Head Groove Pin?
A round head groove pin is a grooved pin manufactured with a rounded, domed head at one end instead of a flush cylindrical top. Like other grooved pins, the shank has rolled grooves that displace material slightly beyond the nominal diameter, so the pin locks into a standard drilled hole through spring pressure rather than requiring a precision reamed fit.
The domed head serves as a built-in stop, bearing surface, or pivot point, which makes this style a common choice for hinge pins, linkage pivots, and applications where the pin needs a finished, retained head rather than sitting flush with the surrounding surface.
Key Features and Benefits
- Domed Head Design: provides a built-in stop, bearing surface, or pivot point.
- Secure Grooved Shank: rolled grooves lock the pin into a standard drilled hole by spring pressure.
- No Reaming Required: fits a standard drilled hole rather than a precision reamed hole.
- Finished Appearance: the rounded head gives a clean, finished look compared to a flush pin.
- Suited to Pivot and Hinge Applications: the head provides a bearing surface for rotating or pivoting parts.
Materials and Finishes
- Steel: standard material for general purpose grooved pins.
- Plain or Zinc Plated Finish: options depending on the corrosion resistance needed.
Standards Compliance
- ISO 8746, Grooved pins with round head
- DIN 1476, Grooved pins with round head
Size Range and Availability
Available in a full metric size range, sold individually or in bulk quantities.
Related Categories and Products
Frequently Asked Questions (FAQs)
1. What is a round head groove pin used for?
It's commonly used as a hinge pin, linkage pivot, or stop pin, anywhere a grooved retention pin also needs a finished, domed head.
2. How does the grooved shank hold the pin in place?
The rolled grooves on the shank displace material slightly beyond the pin's nominal diameter, so when pressed into a drilled hole, the compressed material grips the hole walls by spring pressure.
3. Does a round head groove pin need a reamed hole?
No, like other grooved pins, it's designed to fit a standard drilled hole rather than a precision reamed hole.
4. What is the purpose of the domed head?
The domed head acts as a built-in stop or bearing surface, useful for pivot points, hinges, and applications where the pin shouldn't sit flush with the surrounding surface.
5. Can a round head groove pin be used in a through hole or a blind hole?
It can be used in either, depending on the application, though the grooved shank length should be matched to the hole depth for adequate retention.
6. What sizes are available?
We stock a full metric size range, available individually or in bulk quantities.
