General
Degree of protection	Insulated
Thread	M5
Material	Metal
Application	Cover boxes
Compatibility	U 86

The Spelsberg DH 75-M5 is a metal ceiling hook specifically designed for mounting ceiling boxes in the recessed installation area. It features an insulated construction and an M5 thread, enabling secure fastening. With a length of 75 mm, the hook is designed for use in ceiling constructions, particularly in conjunction with ceiling boxes from the U 86 group. The dimensions are 27.4 mm (width) × 103 mm (length) × 27.4 mm (height), allowing it to fit into standardised installation systems.

Applications
The ceiling hook is used in electrical and installation construction to securely fasten ceiling boxes in hollow walls, concrete or wooden ceilings. It is particularly suitable for installations where electrical insulation between the hook and the ceiling structure is required to avoid short circuits or electrical hazards. Typical use is in residential and commercial buildings, where proper and durable fastening of electrical installations is required.

Functions and Equipment in Detail
The hook is made of metal and is fully insulated, meaning it is not electrically conductive. The integrated M5 thread allows fastening with screws or nuts that also fit M5. The 75 mm length ensures sufficient anchoring depth in the ceiling to securely hold the box. The dimensions of 27.4 mm width and height, and 103 mm length, provide a compact yet stable shape that fits into common ceiling constructions.

Technology Explained Simply
The insulation of the hook protects against electrical contact with the ceiling structure, which is especially important if the ceiling is metallic or conductive. The M5 thread is a standard thread commonly used in electrical installations to securely connect components. The 75 mm length is matched to typical anchoring depths in ceilings to ensure a firm fastening. The metallic construction provides mechanical stability and durability.

Compatibility and Accessories
The DH 75-M5 is specifically designed for ceiling boxes from the U 86 group, which are frequently used in electrical installations. It is part of a system consisting of ceiling boxes, hooks and fastening elements. Compatibility with other boxes is not explicitly mentioned, so compatibility is limited to U 86.

Installation and Mounting
Mounting is done by inserting the hook into the ceiling, where the 75 mm length provides sufficient anchoring depth. Subsequently, the ceiling box is fastened via the M5 thread, with the insulation ensuring no electrical contact with the ceiling structure occurs. Fastening is done using appropriate screws or nuts in M5 format.

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Advantages in Operation
The insulated metal hook provides a secure electrical separation between the ceiling box and the ceiling structure, increasing the safety of the installation. The metallic construction ensures high mechanical stability and longevity. The standardisation of the M5 thread enables easy and universal use with common fastening elements. The dimensions are matched to typical ceiling constructions, enabling smooth installation.