Dynamo Stainless Steel 304 Wedge Expansion Bolt for Hard Rock - Outdoor Use, 25kN Minimum Strength M10x70mm, Pack of 2

• DYNAMO EXPANSION BOLT M10X70MM ? SS304: Crafted from Stainless Steel 304, designed for outdoor use. Not suitable for coastal areas, but custom options for marine-grade steel are available on request.
• ROCK COMPATIBILITY: Ideal for hard rocks like granite with compressive strength > 75MPa. For softer rocks like sandstone and limestone, these anchors may not be strong enough to support heavy loads.
• INSTALLATION REQUIREMENTS: The recommended bore length in rock is 70mm, with a placement length of 62mm. Choosing the correct bolt size is crucial based on the base rock's strength.
• HANGER SPECIFICATIONS: Minimum breaking strength of the hanger is 25kN, tested in radial and axial directions. Older versions marked 22kN are still reliable, with an average breaking load of 40kN.
• STRENGTH AND SAFETY: Radial load cutting strength in 50MPa test concrete blocks is 25kN for both M10 and M12 sizes. Axial pull-out strength is 25kN for M12 bolts and 15kN for M10 bolts.

The Dynamo Expansion Bolt M10x70mm ? SS304 is a durable, wedge-type stainless steel expansion bolt designed for outdoor use. It's ideal for hard rocks like granite (compressive strength > 75MPa), but not recommended for softer rocks such as sandstone or limestone. With a diameter of 10mm and a placement length of 62mm, this bolt requires a bore length of 70mm. Not suitable for coastal areas, but custom marine-grade options are available. The minimum breaking strength of the hanger is 25kN, tested to withstand up to 40kN. Radial load cutting strength is 25kN, and axial pull-out strength is 15kN for M10 bolts.