Items AP280528, AP280529 and AP280530: Siegmund Flush Mount Bolt without slot, burnished, double to quadruple, for System 28. Siegmund recommends this countersunk bolt for aluminum profiles: its adapted collar makes it suitable only for clamping aluminum profiles, with the head flush in the bore. BTH Sales is the exclusive Canadian importer of Siegmund.
Specifications
| Siegmund article | AP280528 (siegmund.com) | AP280529 (siegmund.com) | AP280530 (siegmund.com) |
|---|---|---|---|
| Description | Flush Mount Bolt without slot double burnished | Flush Mount Bolt without slot triple burnished | Flush Mount Bolt without slot quadruple burnished |
| System | Siegmund System 28 (Ø28 mm bores, 100 mm grid) | ||
| Length | 65 mm (2.56 in) | 92 mm (3.62 in) | 117 mm (4.61 in) |
| Weight | 0.28 kg (0.62 lb) | 0.4 kg (0.88 lb) | 0.5 kg (1.10 lb) |
| Components clamped | 2 | 3 | 4 |
| Hex socket | size 6 | ||
| Tightening torque, aluminum | 10 Nm | ||
| Finish | Burnished | ||
| Use | Aluminum profiles only (adapted collar, Siegmund) | ||
| GTIN | 4251805924480 | 4251805924497 | 4251805924534 |
Compatibility
- Fits: Siegmund System 28 welding tables and tooling with Ø28 mm bores on a 100 mm grid. Siegmund System 28 accessories also fit other 28 mm system welding tables with Ø28 mm bores on a 100 mm grid. 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 28: fits every System 28 Siegmund table, including the Professional Extreme 8.7 and 8.8 PLUS tables listed on bthsales.ca.
- Not compatible: System 16 (Ø16 mm) tables; Siegmund builds each system around one bore size.
- Works with: other Siegmund System 28 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 Flush Mount Bolt without slot double burnished (AP280528)
- 1 x Siegmund Flush Mount Bolt without slot triple burnished (AP280529)
- 1 x Siegmund Flush Mount Bolt without slot quadruple burnished (AP280530)
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
- Connecting Siegmund aluminum profiles and other Siegmund components (Siegmund).
- When clamping aluminum parts, tighten hand-tight only (Siegmund).
- Siegmund describes System 28 as ideal for light to heavy components and designed for maximum clamping forces, multi-ton structures and high distortion forces.
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
Is it only for aluminum profiles?
Yes. Siegmund says that, due to the adapted collar, this countersunk bolt is only suitable for clamping aluminum profiles.
How tight should I clamp aluminum parts?
Siegmund says the clamping torque depends on the material, and that when clamping aluminum parts the bolts must only be tightened hand-tight.
Will it fit other 28 mm welding tables?
Yes, if the table has Ø28 mm bores on a 100 mm grid. Check the bore diameter and grid 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
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.
