Our heaviest thread with a 1 mm diameter. It is used for very heavy duty hand and machine sewing and for tying, binding, and hanging. Stitches are a focal point.
Size 554 (Tex 600) polyester thread is our heaviest thread with a 1 mm diameter. It requires a heavy duty machine with a size 330/30 to 360/32 needle.

New ! Groz-Beckert Needles for  Commercial Machines

Information
Code Color Description
BPT5541BLACt Polyester - Size 554 - Black - Service Thread
Polyester Thread - Size 554 / Tex 600 / Govt. 8-Cord - Black - Service Thread - Bonded
Select
BPT5541WHITt Polyester - Size 554 - White - Service Thread
Polyester Thread - Size 554 / Tex 600 / Govt. 8-Cord - White - Service Thread - Bonded
Select