Hillman 370802 Hex Head Sleeve Anchor 3/8 x 3 in - Durable Concrete

Our review of the Hillman 370802 Hex Head Sleeve Anchor finds it best suited for DIYers and professionals who need a simple, reliable fastener for concrete and masonry work. The bottom line: these zinc-plated, expansion sleeve anchors deliver consistent holding power for mounting door and window frames, shelving, and fixtures where a secure concrete anchor is required. They are straightforward to use when pre-drilled holes are available and stand out for durability and predictable expansion performance in brick, block and concrete.

Key Features

• Expansion design: The sleeve anchor expands as the nut is tightened, providing a secure grip in concrete, brick and block for long-term fixture support.
• Zinc plating: The zinc finish adds surface durability and moderate corrosion protection so anchors perform well indoors and in sheltered outdoor locations.
• Versatile base materials: These anchors are suitable for a range of masonry substrates, making them useful for mounting frames, shelving and wall fixtures.
• Hex head nut: The hex head allows standard wrench or socket use so installation is fast and familiar to most tradespeople.
• Pack quantity: Supplied in a 50-pack to keep a jobsite or workshop stocked for multiple installations without repeated ordering.
• Pre-drilling required: Designed for use with a pre-drilled hole so placement is precise and repeatable when using the correct drill bit size.

Who It's For

These sleeve anchors are aimed at contractors, handymen and serious DIYers who frequently work with masonry and concrete. They are ideal when a permanent, mechanical anchor is required for mounting door and window frames, securing shelving, or hanging medium to heavy fixtures. The 50-pack format is convenient for jobs that need many anchors without buying individual pieces.

Customers who need highly corrosion-resistant anchors for exposed marine environments or stainless steel fasteners should look elsewhere, since these are zinc-plated for moderate protection rather than heavy-duty corrosion resistance.

Pros & Cons

Pros

• Reliable expansion mechanism provides strong holding power in concrete and masonry.
• Good perceived quality and anchor strength reported by users who mounted TVs and fixtures.
• Zinc plating improves durability for typical indoor and sheltered outdoor use.
• Large 50-pack keeps projects moving without frequent reorders.

Cons

• Requires pre-drilling and correct hole size, which adds an extra installation step.
• Zinc plating offers only moderate corrosion protection compared with stainless options.

Specifications

Brand	Hillman
Type	Hex head sleeve anchor
Size	3/8 x 3 in
Pack quantity	50 per pack
Finish	Zinc-plated
Base materials	Concrete, brick, block

Our Verdict

The Hillman 370802 sleeve anchors are a dependable, cost-effective choice for mounting fixtures into concrete and masonry when moderate corrosion resistance is acceptable. They deliver consistent expansion-based holding power and the 50-pack is practical for larger projects. Choose these anchors if you need straightforward, mechanical anchoring for interiors or sheltered exteriors; opt for stainless steel if you need heavy-duty corrosion protection.

Frequently Asked Questions

Do these anchors work in both concrete and brick?
Yes, the sleeve anchor design expands in concrete, brick and block to provide a secure mechanical hold when installed correctly.

Is pre-drilling required?
Yes, pre-drilling the correct hole size is required for proper anchor expansion and reliable performance.

Are these suitable for outdoor use?
The zinc plating gives moderate corrosion protection suitable for indoor or sheltered outdoor use; use stainless anchors for harsh or marine environments.