Embedded Part Setting Bolt
A formwork installation bolt is the bolt that holds the plastic embedded part in place on the formwork while the concrete is poured. It passes through the form and clamps the embedded part against it, so the part sits exactly where the cantilever beam will later bolt on. It is hand-tightened with a wing nut, and it is a temporary, reusable tool: after the pour and stripping it is wound out and used again. Lengge supplies it with the embedded parts and wing nuts as a matched set, in M20, galvanized.
Factory-direct pour-day hardware for flower-basket cantilever scaffold projects, shipped in bulk with the rest of the embedded anchor system.
| Item | Specification |
|---|---|
| Function | Fixes the plastic embedded part to the formwork during the pour |
| Type | Temporary, reusable installation tool |
| Pairs with | Wing nut (hand-tightened) and the plastic embedded part |
| Thread | M20, to match the embedded square nut |
| Material | Steel |
| Finish | Galvanized / zinc plated |
| After the pour | Removed and reused; the embedded part stays in the concrete |
| Next step | High-strength S8.8 double-head bolt mounts the beam |
Thread and length are matched to your embedded parts. Tell us the embedded part and we supply the matching installation bolt and wing nut.
A formwork installation bolt is the bolt that holds a plastic embedded part in place against the formwork while concrete is poured. It passes through the form, clamps the embedded part to it, and keeps the part exactly where the cantilever beam will later be fixed. It is a temporary, reusable install tool, not a part that stays in the concrete.
No. The installation bolt is removed. Once the concrete has set and the formwork is stripped, the bolt and its wing nut are wound out and reused on the next pour. Only the plastic embedded part and the square nut inside it stay cast in the concrete. Reusing the bolt is the whole point of the design.
The three parts work as a set. The plastic embedded part holds a square nut and sits against the inside face of the formwork. The installation bolt passes through the form and into the part, and a wing nut hand-tightens it so the part is clamped tight and positioned. After the pour and stripping, the bolt and wing nut come off, and the high-strength double-head bolt threads into the embedded square nut to mount the cantilever beam.
The thread is M20 to match the square nut inside the embedded part, so one bolt size works across the system. Tell us your embedded part and we supply the matching bolt and wing nut.
It is steel, galvanized or zinc plated, so it stands up to being reused pour after pour without the thread corroding. A rusted install bolt is slow to fit and release, so the finish matters on a part that is used many times.
We supply installation bolts in bulk and, more usefully, matched with the embedded parts and wing nuts as a set, so the pour-day hardware all fits. Stock moves quickly; custom sizes we confirm at the time. Parts pack into containers efficiently so freight per ton stays low.
On a flower-basket cantilever scaffold, the beam bolts onto an embedded part that was cast into the structure long before the beam arrives. Getting that embedded part in exactly the right place is the job of the installation bolt. It is simple hardware, but if it does its job badly the beam will not fit. This page explains what it does and how the embedded anchor goes together.
The installation bolt is pour-day hardware. Before the concrete goes in, the plastic embedded part is set against the inside face of the formwork, and the installation bolt passes through the form and holds the part clamped against it. That fixes the part in position, so it does not float, twist or shift while the concrete is poured and vibrated. When the concrete sets, the part is locked exactly where it was placed.
The embedded anchor is three parts plus the bolt that mounts the beam, used in sequence:
The key thing to understand about the installation bolt is that it is not lost in the pour. Only the plastic embedded part and its square nut stay in the concrete; the installation bolt and wing nut are recovered when the formwork is struck and used again on the next pour. That is why they are made in galvanized or zinc-plated steel rather than as cheap one-use parts: they have to thread on and off cleanly, pour after pour, without the thread corroding or seizing.
The thread is M20 to match the square nut inside the embedded part, so the bolt, the embedded socket and the later double-head bolt all share the same thread. Bolts are steel, galvanized or zinc plated for repeated reuse. The sensible way to buy them is as a set with the embedded parts and wing nuts, so the pour-day hardware all matches and nothing is missing on site. Confirm the thread and the embedded part it has to suit, and a supplier who makes the whole embedded system can match the parts for you.
