Item 280563: Siegmund Connecting Bolt XL for System 28, double burnished. Siegmund lists it for connecting 2 components, specifically tables and U-squares, as a fixed long-term connection. It is hardened and has both a hexagon socket and an external hexagon. BTH Sales is the exclusive Canadian importer of Siegmund.
Important: Siegmund says the Fast Clamping Bolt 280511 must not be used for connecting tables and U-shaped squares. Use a connecting bolt such as this one to fasten a Square U-Shape to the table.
Specifications
| Siegmund article | 280563 (siegmund.com) |
|---|---|
| Description | Connecting Bolt XL double burnished |
| System | Siegmund System 28 (Ø28 mm bores, 100 mm grid) |
| Length | 72 mm (2.83 in) |
| Weight | 0.35 kg (0.77 lb) |
| Components connected | 2 |
| Hex socket | size 10 |
| External hexagon | size 32 |
| Shearing force, rated per bolt | 200 kN |
| Tensile force, steel, rated per bolt | 20 kN |
| Tightening torque, steel | 420 Nm |
| Finish | Burnished, hardened |
| Elongated holes | Not suitable (Siegmund) |
| Aluminum profiles | Not suitable (Siegmund) |
| Pack quantity | Sold individually |
Related products & accessories
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Siegmund System 28 - Fast Clamping Bolt without Slot
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Siegmund System 16 & 28 - Anti-Splatter
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Siegmund System 16 & 28 - Clean Basic
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Siegmund System 16 & 28 - Ground Connection Comfort
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Siegmund System 28 - Connecting Bolt
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Siegmund System 28 - Connecting Bolt with Collar
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Compatibility
- Fits: Siegmund System 28 welding tables and System 28 Square U-Shapes with Ø28 mm bores on a 100 mm grid.
- Square U-Shapes: Siegmund's System 28 U-square pages say the square is firmly mounted to the table using Connecting Bolts (Item No. 280563), and that riser blocks are mounted to the table using connector bolts (Item No. 280563).
- Not for: Premium Light U-squares, where Siegmund names Connecting Bolt 800562; elongated holes; aluminum profiles.
- Do not substitute: the Fast Clamping Bolt 280511. Siegmund says it must not be used for connecting tables and U-shaped squares.
- Not compatible: System 16 (Ø16 mm) tables; Siegmund builds each system around one bore size.
- Care & grounding: anti-spatter spray, CleanBasic cleaner, Ground Connection Comfort (S16/S28).
What's included
Sold individually: each unit is one Siegmund Connecting Bolt XL double burnished (280563).
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
- Fastening System 28 Square U-Shapes to the welding table (Siegmund).
- Mounting System 28 riser blocks to the table (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
Can I use a fast clamping bolt to connect U-squares?
No. Siegmund says the Fast Clamping Bolt 280511 must not be used for connecting tables and U-shaped squares. Use a connecting bolt such as this Connecting Bolt XL, which Siegmund lists for a fixed long-term connection of tables and U-squares.
Can I use it in an elongated hole or an aluminum profile?
No. Siegmund says the Connecting Bolt XL is not suitable for elongated holes and not suitable for aluminum profiles. The Connecting Bolt with Collar (280583 to 280585) is suitable for elongated holes.
What tools does it take?
Siegmund lists a hexagon socket (size 10) and an external hexagon (size 32). The listed tightening torque in steel is 420 Nm.
Does it work with Premium Light U-squares?
Siegmund names a different bolt for those: its Premium Light U-square pages say riser blocks are mounted to the table using connector bolts (Item No. 800562), not 280563.
Related parts
- Siegmund System 28 Square U-Shapes
- System 28 Connecting Bolt
- System 28 Connecting Bolt with Collar
- All Siegmund System 28 bolts
Ships across Canada from 5 Industrial Rd, St. Marys, ON N4X 1G2, or pick up from our warehouse. Most orders ship within 1–2 business days. For an accurate shipping timeline, contact us and we'll give you a delivery estimate. Email sales@bthsales.ca or call 519-461-1381 with questions or for a freight quote.
