Throughbolts M8 x 50mm Zinc Plated – Box of 100

M8 x 50mm throughbolts, bright zinc plated, in a trade box of 100. A torque-controlled expansion anchor for fixing straight through the fixture into solid concrete – drill, tap through and tighten the nut, and the expansion clip grips the hole for a strong, permanent fixing.

Each bolt comes complete with a hex full nut and washer, and the chamfered end protects the thread while it is driven home. Ideal for steelwork, racking, handrails, machinery and heavy brackets.

Key features

• Torque-controlled expansion anchor for concrete
• Through-fixing – drill straight through the fixture
• Supplied with hex full nut and washer
• Chamfered end protects the thread during installation
• Bright zinc plated carbon steel

Specification

Packaging may vary from the image shown. Supplied as specified.

Applications

Structural steelwork, racking, handrails and balustrades, gates, machinery, brackets, shelving and heavy fixtures into solid concrete of 25N/mm² or stronger. For internal, dry environments.

FAQs

What size hole do I drill for an M8 throughbolt?

Drill a 8mm hole straight through the fixture into the concrete, to a minimum depth of 45mm. Clean the hole out before inserting the bolt.

How tight should I torque it?

The recommended tightening torque at M8 is 15 Nm. If no torque wrench is available, tighten the nut 3 to 4 full turns from finger tight.

Can I use throughbolts in brick or block?

Throughbolts are designed for solid concrete. For brick, block or weaker masonry use a shield anchor or a chemical anchor.

Are they suitable for outdoor use?

These are bright zinc plated for internal, dry conditions. For external or damp locations use a galvanised or stainless steel anchor.

Other sizes and related products

Other sizes in this range: M8 x 100mm, M8 x 130mm, M8 x 65mm, M8 x 80mm.

Browse the full throughbolts range, or see our shield anchors and chemical anchoring.

Nationwide delivery across Ireland – free on orders over €100.