Similar to acme threads in form and function, trapezoidal threads have a 30 degree flank angle compared to the acme form’s 29 degree flank angle. The trap product is metric and rolled in diameters from 4mm to 170mm and pitches ranging from 1mm to 14mm. Precision lead screw applications are accommodated by lead accuracy as close as 7µm per 25mm and straightness to .001 per inch. Carbon steel, heat treated alloys, stainless steel, aluminum and nickel alloys can be rolled in trap forms up to 40 feet long with right or left handed thread angles. We follow an ISO metric profile for trapezoidal threaded products.


  • BS5346