Taper Pin, Internal Thread, Metric Sizes
What Is an Internally Threaded Taper Pin?
An internally threaded taper pin is a standard tapered pin with an internal thread machined into the large end. Like any taper pin, it seats into a matching reamed tapered hole to provide precise alignment and a secure, self-locking fit between mating parts as it's driven in. The added internal thread lets you thread in a pulling bolt or slide hammer adapter to draw the pin back out.
This feature is especially useful for pins installed in blind holes, where the small end of the pin is not accessible to drive it back out from the opposite side. Rather than having to punch or drill the pin out, a bolt threaded into the large end allows controlled, damage free removal.
Key Features and Benefits
- Internal Thread for Extraction: allows a pulling bolt to be threaded in for removal.
- Ideal for Blind Holes: removable even when the small end of the pin isn't accessible.
- Precise Taper Fit: self-centers and locks mating parts in alignment as it's driven in.
- Damage Free Removal: avoids punching or drilling out a stuck pin.
- Standard Taper Geometry: fits the same reamed tapered holes as a standard taper pin.
Materials and Finishes
- Steel: standard material for general purpose taper pins.
- Plain or Zinc Plated Finish: options depending on the corrosion resistance needed.
Standards Compliance
- ISO 8737, Taper pins with internal thread
- DIN 7977, Taper pins with internal thread
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 an internally threaded taper pin used for?
It's used like a standard taper pin to align and lock mating parts, with the added benefit of an internal thread that allows the pin to be pulled back out with a bolt.
2. Why would I need a taper pin with an internal thread instead of a standard taper pin?
Choose the internally threaded version when the pin will be installed in a blind hole or another location where the small end can't be reached or struck to drive the pin back out.
3. How do you remove an internally threaded taper pin?
A bolt or a slide hammer adapter is threaded into the internal thread at the large end, then used to pull the pin straight back out of the hole.
4. Does an internally threaded taper pin fit the same hole as a standard taper pin?
Yes, it has the same taper geometry and fits the same reamed tapered hole as a standard taper pin; only the large end differs.
5. Can this pin still be driven in the same way as a standard taper pin?
Yes, it's installed the same way, driven into a matching reamed tapered hole; the internal thread only affects how it's removed.
6. What sizes are available?
We stock a full metric size range, available individually or in bulk quantities.
