


Items 160656, 160656.E and 160656.PA: Siegmund Prism for Screw Clamps, System 16, in burnished steel, stainless steel or polyamide. It sits on the ball head of the threaded arbor, so it moves to seat precisely on round and square pipes, and you change it by simply pulling it off the ball head. BTH Sales is the exclusive Canadian importer of Siegmund.
Specifications
| Siegmund article | 160656 (siegmund.com) | 160656.E (siegmund.com) | 160656.PA (siegmund.com) |
|---|---|---|---|
| Description | Prism for Screw Clamps burnished | Prism for Screw Clamps Stainless Steel | Prism for Screw Clamps Polyamide |
| System | Siegmund System 16 (Ø16 mm bores, 50 mm grid) | ||
| Height | 14 mm (0.55 in) | ||
| Diameter | 25 mm (0.98 in) | ||
| Weight | 0.03 kg (0.07 lb) | 0.03 kg (0.07 lb) | 0.01 kg (0.02 lb) |
| Finish | Burnished | – | – |
| Fits | Spindles with 8 mm ball diameter; 16 mm bores and clamps | ||
| GTIN | 4251805904925 | 4251805905472 | 4251805905489 |
Compatibility
- Fits: Siegmund System 16 welding tables and tooling with Ø16 mm bores on a 50 mm grid. It fits System 16 screw clamps with an 8 mm ball spindle, including clamps used on other 16 mm system welding tables with Ø16 mm bores. Compatible tables from other manufacturers are often made from different materials and to different standards, so quality varies by manufacturer, compared with Siegmund's X8.7 tool steel.
- Siegmund System 16: a prism "for spindle with ball diameter 8 mm", which Siegmund rates "compatible with 16 mm boreholes and clamps" (steel, stainless and polyamide versions), so it goes on the System 16 screw clamps listed on bthsales.ca such as the Professional, 45°/90° and Basic Screw Clamps.
- Not compatible: System 28 (Ø28 mm) tables; Siegmund builds each system around one bore size.
- Works with: other Siegmund System 16 clamps, bolts, stops, squares and U-squares on the same table.
- Care & grounding: anti-spatter spray, CleanBasic cleaner, Ground Connection Comfort (S16/S28).
What's included
Choose one option; each option is one piece:
- 1 x Siegmund Prism for Screw Clamps burnished (160656)
- 1 x Siegmund Prism for Screw Clamps Stainless Steel (160656.E)
- 1 x Siegmund Prism for Screw Clamps Polyamide (160656.PA)
Engineering support & demos
Engineering support comes with your purchase: fixture design, layout drawings, CAD and 3D models, site visits and cobot cell planning, handled by Travis Hardcastle at BTH Sales or by Siegmund directly. BTH Sales does not sell cobots; for cobot cells we help with table integration and fixturing (see cobot welding with Siegmund tables). Live demos at our St. Marys showroom are by appointment (book a demo), and we offer video demos if you are outside Ontario. BTH Sales is family-owned, founded in 2001, and has been the exclusive Canadian importer of Siegmund since 2018.
Typical uses
- Clamping round and square pipes (Siegmund).
- Stainless steel prism: Siegmund uses it on scratch-resistant precious metals for rust prevention.
- Polyamide prism: Siegmund uses it on scratch-prone surfaces.
- Siegmund recommends System 16 for light to medium-duty work and precision fixtures; its close 50 mm grid lets small components be fixed with high precision.

Industries served: Siegmund's published practical examples show its welding tables and tooling in these sectors: Agriculture; Interior; Lighting and electrical engineering; Machine tools and plant construction; Measurement and testing technology; Motorcycle engineering; Revolving door systems; Robotic technology; Stage technology; Stainless steel processing; Steel, sheet metal and metal construction; Textile production; Train Construction; Vehicle construction; Welding technology; Woodworking.
Frequently Asked Questions
Which prism material should I choose?
Siegmund offers the prism in burnished steel (160656), stainless steel (160656.E) for scratch-resistant precious metals to prevent rust, and polyamide (160656.PA) for scratch-prone surfaces.
Which clamps does this prism fit?
Siegmund lists it for spindles with an 8 mm ball diameter, compatible with 16 mm bores and clamps. It sits on the ball head of the threaded arbor and is replaced by simply taking it off the ball head.
Will it fit screw clamps used on other 16 mm welding tables?
Yes, if the clamp has a spindle with an 8 mm ball head. Check the ball diameter before ordering. Compatible tables from other manufacturers are often made from different materials and to different standards, so quality varies by manufacturer, compared with Siegmund's X8.7 tool steel.
Related parts
- System 16 Pressure Ball for Screw Clamps
- System 16 Professional Screw Clamp (160610)
- System 16 threaded arbors
- System 28 prism for screw clamps
- Siegmund System 16 welding table clamps
- All Siegmund System 16 clamp replacement parts
Ships across Canada from 5 Industrial Rd, St. Marys, ON N4X 1G2, or pick up from our warehouse. Most orders ship within 48 hours. Email sales@bthsales.ca or call +1-519-461-1381 with questions or for a freight quote.