Buttress Threads and Saw threads
The profile of a buttress thread or saw thread resembles a saw tooth. This makes it possible to transfer immense force along the screw with a flank angle of 30° to 40°. We manufacture single-start and multi-start ISO buttress screws according to DIN 513, DIN 20401, DIN 2781 and DIN 6063 specifications.

We also manufacture your buttress threads and saw threads with custom sizes or out of any material you desire. Many customers chose C45 steel or higher steel grades such as 42CrMo4. We also offer any special coating for your buttress thread such as thin dense chrome plating or phosphating.

The corresponding buttress nuts are often made of aluminum bronze. However some heavy duty lifting applications may also require tougher grades such as manganese bronze.

Screws with a buttress thread profile are mainly used in vertical lifting applications where the load is firmly supported on the upper flank of the screw thread.

The asymmetrical profile of the buttress thread, makes them suitable for bearing extremely high, single-direction axial loads and their load capacity is far higher than that of common Acme screws or Trapezoidal screws. Therefore buttress threads are commonly used as:

Screws for friction screw presses
Lifting screws for heavy lifting equipment
Lead screws or power screws in machines with high loads
Transmission threads in turning and milling machines
Screws in artillery equipment

Parameter Name	Parameter Value
Type	custom saw
Material	metallic