With two twin bolts in the upper and lower position, the Winkhaus Thunderbolt™ locking system has 5 deadbolts as standard, giving high security and peace of mind. The Thunderbolt™ locking system is extremely easy to install and can be used with a range of doors including composite, timber, aluminium or PVCu.

Product Information

20mm throw twin deadbolts
High security nickel plated alloy deadbolts that fully engage the keep rail and help prevent forcing the sash and frame apart.

Heavy duty steel keeps
Heavy duty keeps manufactured using high grade steel, plated to comply with Grade 4 corrosion resistance BS EN1670.

Latch and centre deadbolt
Precision engineered alloy sprung latch and nickel plated steel deadbolt provides the Thunderbolt™ with maximum strength in the centre of the door.

High performance gearbox
Tested to 100,000 cycles, the sprung gearbox offers the lowest possible operating forces and helps prevent handle ‘droop’.

Winkhaus Family of Locks

Lifetime Adaptability

Thunderbolt™ is a part of the ‘Winkhaus Family of Locks’ with exactly the same routing details as the Winkhaus Cobra, Trulock and autoLock AV2 and AV3 locking mechanisms allowing the locks to be interchanged for user requirements or building use.

Further benefits

Icon Häckchen dunkelblau Check

Made in Germany – precision engineering

Icon Häckchen dunkelblau Check

Manufactured using high quality materials

Icon Häckchen dunkelblau Check

Available in a wide range of variants

Icon Häckchen dunkelblau Check

Proven long term reliability

Icon Häckchen dunkelblau Check

Very high corrosion resistance

Icon Häckchen dunkelblau Check

All Winkhaus door locking systems are thoroughly tested to the latest standards


Winkhaus Thunderbolt 2023 Brochure



Brochure Family of Locks



Get in touch!

For further detailed technical information about our products, please get in touch with us and we will be happy to help.

Türverriegelung mechanisch Tür offen mit Garten