Cable connectors
What is a M40 cable gland?
M40 cable glands from WISKA and Lapp are characterised by their versatility. The DIN-compliant M40 cable gland features a metric thread with a diameter of 40 mm and a pitch of 1.5. The popular SKINTOP cable gland series from Lapp is also available in the M40 variant,
but it doesn't matter whether it’s a Wiska cable gland or a Lapp cable gland e.g. SKINDICHT cable gland or SKINTOP: The mode of operation is similar for all manufacturers.
Overview of types for M40 cable glands
| Type according to material | Application | Advantage/disadvantage |
| Plastic cable gland | Distribution boxes, control cabinets, photovoltaics | cheap and easy/ not electrically conductive |
| Stainless steel cable gland | l Hygiene sector, shipbuilding, ATEX / Ex-EMC | corrosion-resistant / high weight, comparatively expensive |
| Metal cable gland | Plant, vehicle and machine construction | robust, temperature-resistant / high weight |
| Brass cable gland | Shipbuilding, ATEX /Ex-EMC | temperature-resistant / high weight, comparatively expensive |
What is the diameter of an M40 cable gland and which cables fit through it?
An M40 cable gland is defined by the inner diameter of 40 mm. This also determines the minimum or maximum clamping range, which defines the possible cable diameter of a wire that fits into an M40 cable gland.
The most important information at a glance:
- Thread diameter: 40 mm
- Bore diameter: 40.2 mm
- Thread pitch:: 1.5
- Lead-through hole: 40.5 mm (depending on manufacturer)
- M40 cable gland for 2 cables: 9 mm (multiple sealing insert from Lapp)
What is the clamping range of an M40 cable gland?
Maximum 19 mm, minimum 28.0 mm
Which PG gland corresponds to an M40 cable gland?
The PG glands commonly used in Germany according to the old DIN standard DIN 46320 (superseded by DIN EN 62444) are gradually being replaced by the prescribed metric threads. The size PG36 corresponds to a M40 x 1.5 cable gland.
Overview of metric threads for cable glands
| Nominal size metric | Clamping range (approx. data) | Outer Ø of the thread in mm | Pitch |
| M12 cable gland | 3 - 7 mm | 12.0 | 1.5 |
| M16 cable gland | 4.5 - 10 mm | 16.0 | 1.5 |
| M20 cable gland | 7 - 13 mm | 20.0 | 1.5 |
| M25 cable gland | 9 - 17 mm | 25.0 | 1.5 |
| M32 cable gland | 11 - 21 mm | 32.0 | 1.5 |
| M50 cable gland | 27 - 35 mm | 50.0 | 1.5 |
| M63 cable gland | 34 - 45 mm | 63.0 | 1.5 |
M thread acc. to EN 60423 resp. IEC 423 or BS 6053 ISO 68/DIN13