Throughbolts Stainless Steel A4 ETA Option 7

Overview

A4-316 stainless steel throughbolts are high-performance, ETA Option 7 approved anchors engineered for non-cracked concrete. Featuring a time-saving "through fixing" design and ultimate corrosion resistance, they provide exceptional torque-controlled holding power for heavy outdoor, coastal, and structural installations.

How it works

Installing these stainless steel throughbolts is highly efficient. Simply position your bracket or wooden structure precisely where it needs to go. Using a hammer drill, bore a hole straight through the fixture's pre-drilled clearance hole directly down into the solid concrete. Clear out the concrete dust, then firmly tap the fully assembled throughbolt through the fixture and into the hole until the washer sits flush against the metal. Grab your torque wrench and tighten the nut; this pulls the internal bolt upward, flaring the three-way sleeve tightly against the concrete walls for a permanent, rust-free hold.

Ultimate Marine-Grade Durability

When you are installing stadium seating, structural facades, or heavy coastal gates, standard zinc anchors simply won't survive. Rain, salt spray, and pollution quickly eat away at inferior metals, compromising the safety of the entire structure.

These throughbolts are manufactured from premium A4-316 stainless steel. This marine-grade alloy provides exceptional resistance to rust, harsh weather, and corrosive environments, giving you the practical advantage of a maintenance-free, lifetime hold.

Drill, Drop, and Drive

Wrestling heavy steel beams or awkward wooden structures into place just to mark drill holes is incredibly frustrating. It wastes time and often leads to misaligned fixtures when you finally reposition heavy brackets.

The ETA Option 7 throughbolt is a true "through fixing." The bolt diameter perfectly matches the required drill hole. This means you can align your facade bracket or steel beam once, drill directly through the fixture's clearance hole, and tap the anchor straight in.

Certified Structural Security

Industrial and commercial projects demand rigorous safety standards. You cannot afford to guess if an anchor will hold. These throughbolts carry ETA Option 7 approval, guaranteeing high-performance, predictable load capacities in non-cracked concrete.

As you apply torque to the nut, the internal mechanism forcefully expands the heavy-duty three-way sleeve against the concrete. This provides an aggressive, immediate mechanical lock capable of handling immense structural stress.

Built for Critical Fire Safety

In modern construction, fire resistance is absolutely critical. These A4 stainless steel anchors feature fire-resistant loading capabilities, ensuring they maintain their structural integrity even under extreme temperatures.

Whether you are a structural engineer securing pipe trays in a chemical plant or a contractor installing high-traffic railing fixings, you get the peace of mind that comes from using a tested, certified, and globally trusted anchoring system.

Key Features

• Manufactured from highly durable, marine-grade A4-316 stainless steel.
• ETA Option 7 approved for non-cracked concrete (C20/25 to C50/60).
• Time-saving true-to-size "through fixing" design.
• Heavy-duty three-way expansion sleeve for maximum mechanical grip.
• Torque-controlled installation for predictable, secure loading.
• Tested and certified fire-resistant loading capabilities.