Fixing and buying guide
JL-HDT76GM 76mm Gun Metal Heavy Duty Tubular Latch
What this latch is for
This heavy-duty tubular latch is engineered for doors that experience heavy use, such as commercial premises, public buildings, care facilities, and busy domestic properties. The robust construction handles repeated opening and closing without degradation. Its fire-rated certification makes it particularly suitable for internal doors in buildings where fire safety compliance is required, including FD30 and FD60 rated door sets.
- Heavy-duty construction for high-traffic door applications
- Fire-rated approval for FD30 and FD60 door sets
- Suitable for commercial and residential heavy-use environments
- Compatible with lever handles and door knobs
Sizing and compatibility
The 76mm measurement refers to the backset distance, which is the distance from the face of the door to the centre of the handle spindle hole. Before purchasing, confirm your door's backset requirement, as this determines whether the latch will align correctly with your existing or planned handle hardware. This latch is designed to fit into a standard cylindrical mortise hole drilled into the door edge. Verify that your door thickness and construction are suitable for tubular latch installation.
- 76mm backset for standard door applications
- Requires cylindrical hole drilled into door edge
- Check door thickness and material compatibility before ordering
- Confirm handle spindle hole alignment with your hardware
Materials and standards
This latch is manufactured from Grade 304 Stainless Steel with a gun metal finish, providing excellent corrosion resistance and durability. The gun metal coating offers aesthetic appeal whilst maintaining the strength of the underlying stainless steel. Full certification under UKCA1121 and CE2812 standards, plus compliance with BS EN 12209:2003, confirms this product meets UK and European safety and performance requirements for door hardware.
- Grade 304 Stainless Steel construction
- Gun metal finish for appearance and protection
- UKCA and CE certified
- BS EN 12209:2003 compliant
Pre-installation checks
Before fitting, measure your door's backset to confirm the 76mm dimension matches your requirements. Inspect the door edge to ensure it is straight and free from damage, as any warping or defects will affect latch operation. Check that the cylindrical hole is correctly sized and positioned for the tubular latch body. Ensure your lever handles or door knobs are compatible with tubular latch mechanisms and that the spindle holes align with the latch. If installing into a fire-rated door set, verify that all components, including the latch, handles, and door frame, maintain the required fire rating.
- Measure backset distance to confirm 76mm requirement
- Inspect door edge for straightness and damage
- Verify cylindrical hole size and positioning
- Check handle and knob compatibility with tubular latch
- Confirm fire-rating compliance for FD30/60 door sets