Red Head 3/8 in Hex-Nut Concrete Wedge Anchor Review (2026)
By The DIYPicks Team · Updated July 2026
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- Concrete
- Heavy loads
- Structural
The go-to structural anchor for solid concrete, but permanent and wrong for hollow or brittle masonry.
Pros
- Highest holding strength here for solid concrete, code-listed for structural use
- Simple install, drill, hammer in, tighten the nut and the sleeve expands to lock
- Zinc-plated steel stud handles high shear as well as tension loads
Cons
- Permanent, once expanded it cannot be backed out and reused
- Only for solid concrete, it will crack or fail to hold in brick, block, or mortar
- Requires a hammer drill and correct embedment depth and edge spacing to reach rated capacity
Specifications
| Base material | Solid poured concrete only |
|---|---|
| Load rating | Thousands of lb in strong concrete (code-listed, derate per spacing) |
| Anchor type | Expansion wedge anchor |
| Drill bit | 3/8 in |
| Screw | Integral stud with hex nut and washer |
| Best use | Structural supports, posts, machinery, ledger boards in concrete |