This product is a 10 x 90mm resin internal socket manufactured from A4 (316) stainless steel, designed to be inserted into a drilled hole and bonded with chemical anchor resin to create an internal, thread-ready anchor. Its primary use is to receive a threaded rod or stud (M10 internal thread) in masonry and concrete when a recessed, corrosion-resistant female connection is required.

The socket is produced in A4 (316) stainless steel, giving enhanced corrosion resistance in chloride and coastal environments compared with A2 (304). The part is machined to M10 metric internal thread form (ISO metric thread to ISO 261/965) with a nominal overall length of 90mm. The component is supplied with a passivated finish to remove free iron and improve corrosion performance, and the material complies with EN 10088 family designations for stainless steels and ISO 3506 for stainless fastener mechanical behaviour where applicable. As an internal socket it has no head or drive — it is a plain cylindrical, internally threaded insert intended for adhesive anchoring rather than torque installation.

Typical applications include chemical anchoring in cracked and uncracked concrete, blockwork and brick where a threaded connection must be embedded out of sight. Industries that commonly specify A4 resin sockets are marine and offshore construction, coastal civil engineering, petrochemical and chemical plants, swimming pool and leisure facilities, and food or pharmaceutical processing where chloride resistance and cleanable stainless components are required. They are compatible with most two-part epoxy, vinylester and polyester anchoring resins when installed to the resin manufacturer's instructions.

Key benefits of using an A4 stainless internal socket are long-term corrosion resistance in aggressive environments, material compatibility with A4 threaded bars and studs to avoid galvanic issues, and reliable mechanical engagement when used in certified chemical anchor systems. The M10 internal thread provides a standardised connection for common fasteners, while the passivated finish extends service life.

Duchy Fasteners maintains a comprehensive stock of A4 resin internal sockets in common diameters and lengths and supplies them singly and in trade pack quantities — please contact us or check the product page for current sizes and pack options.