The Amtech closed hook bolt set has a zinc passivated finish for maximum protection and is suitable for secure and reliable fixing of items and fixtures to masonry, concrete, brick, block etc.
Requires a 12mm clearance hole for the expansive bolt and the M6 thread requires a 10mm spanner to tighten the expansion nut.
Internal eye diameter 20mm.
Not suitable for applications requiring Building Inspector/LOcal Authority approval.
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