Red Head 3/8 in Hex-Nut Sleeve Anchor Review (2026)
By Nate Sawyer, Editor · Updated July 2026
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- Brick
- Block
- Concrete
Red Head's 3/8 in sleeve anchor is a versatile expansion anchor rated for solid concrete plus hollow block and brick, where wedge anchors often fail, with a full-length sleeve that spreads clamping force in soft masonry. But it has lower ultimate strength than a same-diameter wedge, and holding in old crumbly brick should be pull-tested.
Pros
- One of the few expansion anchors rated for brick and hollow block, not just poured concrete
- The full-length sleeve spreads clamping force, so it is more forgiving in soft masonry than a wedge
- Code-approved for commercial building use and available in many lengths
Cons
- Lower ultimate strength than a wedge anchor of the same diameter in solid concrete
- Permanent and not reusable once the sleeve expands
- Holding power in old or crumbly brick is unpredictable and should be pull-tested
Specifications
| Base material | Solid concrete, hollow block, and brick |
|---|---|
| Load rating | Medium-to-heavy, varies by base material (weakest in soft brick) |
| Anchor type | Expansion sleeve anchor |
| Drill bit | 3/8 in |
| Screw | Integral stud with hex nut and washer |
| Best use | Ledger boards, electrical boxes, brackets in brick or block |