The M20 x 175mm Resin Hammer‑in Capsule is a glass‑encapsulated chemical anchoring system designed for fixing M20 metric threaded bars and bolts into drilled concrete and masonry. The capsule contains a two‑component resin and hardener in a thin glass tube; when the threaded bar is hammered into the hole the glass breaks, the two parts mix and the resin cures to form a bonded anchor suitable for static and dynamic loads where a mechanical or adhesive connection to base material is needed.

Technically, the capsule is intended for use with ISO metric coarse thread M20 rods and bolts (ISO metric thread standard) and is compatible with common material grades of anchor rod including measured property classes such as 4.6, 8.8 and high‑strength 10.9, as well as stainless grades A2/A4 where specified. The outer is a crushable glass capsule containing a resin formulation (typical variants use polyester or vinylester chemistry) and a hardener; cure is achieved by mechanical mixing when the capsule is crushed. This hammer‑in type requires a drilled hole matching the capsule length (175mm), thorough hole cleaning, insertion of the capsule, and driving the threaded bar to fully crush and mix the contents. Cure times are dependent on temperature and resin chemistry and should follow the resin manufacturer’s data sheet.

Typical applications include fixing structural and non‑structural anchors for handrails, balustrades, safety barriers, steelwork base plates, façade fixings and mechanical and electrical support systems. The product is used widely across construction, civil engineering, rail, utilities and building services where site speed and ease of installation are important — particularly where access or weather makes dispensing cartridges impractical.

Key benefits are a compact, site‑ready capsule that enables rapid installation without static mixers, reliable bond to concrete and masonry when installed correctly, and good chemical and moisture resistance once cured (dependent on resin type). The system provides compatibility with a wide range of rod materials and strength grades while avoiding the need for complex dispensing equipment.

Duchy Fasteners stocks the RCHCAP20 hammer‑in capsules in single and multi‑pack quantities and maintains a broader range of chemical anchors and capsules in lengths and diameters to suit M8 through M24 applications; contact us for available pack sizes and technical guidance.