The Siegmund prism collar screw with countersunk bolt provides a secure method for fastening prisms into System 28 boreholes. Its nitrided finish increases surface hardness and resistance to wear, ensuring long service life in demanding fabrication setups. Compact yet durable, it delivers reliable stability for all System 28 prism attachments.
- It fastens prisms securely into System 28 boreholes.
- Countersunk bolt ensures flush and stable seating.
- Nitrided surface provides enhanced wear and corrosion resistance.
- Compact design allows quick setup and easy removal.
- Precision-machined for consistent performance in fixture assemblies.
Key Features:
- Secures Siegmund prisms with reliability and precision.
- Nitrided finish extends durability under heavy use.
- Flush countersunk design provides clean mounting.
- Compatible with all Siegmund System 28 Metric Series prisms.
Specifications:
- System: Siegmund System 28 Metric Series
- Length: 17mm (0.67" Inches)
- Diameter: 28mm (1.10" Inches)
- Weight: 0.31 lbs. (0.14 kg.)
- Finish: Nitrided
Common Uses:
This collar screw is used to lock Siegmund prisms securely into System 28 tables. Its nitrided surface withstands constant tightening and loosening, ensuring long-term reliability. Fabricators use it for stable, repeatable setups where precision prism placement is required.


