Free UK delivery on orders over £40

Internal Threaded Anchors

(4 products)

Our internal threaded anchors give you a clean, flush‑fit fixing in solid concrete, with zinc plated and A4 stainless steel options ideal for overhead pipework, ducting, and suspended ceilings.

    View as

    Internal threaded anchors are designed for situations where you need a strong fixing point inside solid concrete while keeping the surface clean and flush. Zinc and yellow plated drop‑in anchors are a reliable choice for everyday indoor work, giving installers a secure threaded socket for suspending pipework, cable trays or ceiling systems. They’re quick to set with a punch and hold firmly without slipping deeper into the hole. When the job is outdoors or in harsher environments, A4‑316 stainless steel ETA‑approved anchors offer the corrosion resistance needed for coastal areas, exposed plant rooms and external HVAC installations. Many installers pair these anchors with the correct stop drill bits and setting punches to ensure the anchor expands properly and locks into the concrete. Depending on the project, tradespeople often look at related fixings such as Ankerbolts for direct‑tapping solutions, Throughbolts for heavier structural loads, Chemical Anchors when resin‑based fixings are required, and Hexagon Bolting when selecting the right threaded rod or bolts to complete the installation.

    FREE SHIPPING!ON ALL ORDERS OVER £40

    Frequently Asked Questions

    What type of drop‑in anchor should I use indoors?

    For dry internal environments, zinc and yellow plated drop‑in anchors are usually the best choice because they provide a strong mechanical grip and a clean flush finish without needing corrosion‑resistant materials.

    Do I need stainless steel anchors if the fixing is outdoors?

    Yes, outdoor or coastal installations benefit from A4‑316 stainless steel anchors. They offer marine‑grade corrosion resistance and are ETA‑approved for cracked and non‑cracked concrete, giving long‑term reliability in harsh conditions.

    Why do drop‑in anchors need a setting punch?

    Drop‑in anchors rely on a deformation‑controlled expansion mechanism. Striking them with a setting punch forces the internal wedge to expand against the concrete walls, creating a secure mechanical lock that prevents spinning or over‑insertion.

    Our Collections

    Recent Reviews

    4.72 ★ (64)
    Verified

    SIGN UP & Save 5%

    SIGN UP