A2 A4 Stainless Steel Concrete Sleeve Anchor

A2 A4 stainless steel concrete sleeve anchor is a type of expansion anchor used to secure objects to concrete, brick, or block. The A2 and A4 classifications refer to the material grade of the anchor, indicating its corrosion resistance.

A2 vs. A4 Concrete Sleeve Anchors

Feature A2 (Stainless Steel 304) A4 (Stainless Steel 316)

Corrosion Resistance Good resistance to mild atmospheric and chemical exposure Superior resistance to saltwater, chlorides, and harsh chemicals

Common Uses Indoor or mild outdoor environments (non-coastal) Marine, coastal, industrial, or high-humidity areas

Material Austenitic stainless steel (304) Austenitic stainless steel (316)

Cost Less expensive More expensive due to higher corrosion resistance

Sleeve Anchor Basics

Function: Expands when tightened, gripping the base material.

Installation: Requires a pre-drilled hole (diameter matches anchor size).

Load Capacity: Depends on diameter, embedment depth, and concrete strength.

Common Sizes

Diameters: M6, M8, M10, M12, 1/2", 5/8", etc.

Lengths: Vary based on application (typically 40mm to 200mm+).

When to Use A2 vs. A4?

A2: General construction, indoor use, dry or mildly corrosive environments.

A4: Coastal areas, swimming pools, chemical plants, or high-humidity zones.