GHD thread stands for Gouda Heavy Duty thread and has been specially designed by Gouda Geo-Equipment for nearshore cone penetration tests using top-push technique. The thread has many advantages over the threads currently available:
- Optimal balance between male and female threads
- Single-entry thread, so much less susceptible to loosening during the CPT process
- Only 3 revolutions required to close or open
- Easy to clean with a steelwire brush
- Closes superbly resulting in a very good resistance to water inflow
Dimensions and Characteristics
Available (effective) lengths : 1,000, 500 and 300 mm
Outer diameter : 44.5 mm
Inner diameter : 20 mm
Weight : 9.7 kg
Length of the MALE thread : 45 mm
Outer thread diameter (top) : 29.5 mm
Outer thread diameter (base) : 37 mm
Required number of turns to lock / unlock : 4
