Partially Twisted Round Head Thread

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Partially Twisted Round Head Thread | Screw Manufacturing for 50 Years | Sen Chang

Sen Chang Industrial Co., Ltd., since 1968, is a Partially Twisted Round Head Thread | CE certified screw manufacturer based in Taiwan.

ISO 9001 certified self tapping screw production processes and stainless steel screws and bolts with meticulous quality control. Screws and bolts including Machine Screws, Tapping Screws, SEMS Screws, Coating Screws and High Tensile Screws.

Sen Chang has been supplying nuts and bolts to customers, both with advanced technology and 48 years of experience, Sen Chang ensures each customer's demands are met.

Partially Twisted Round Head Thread


Process: using multi blow header to shape the head and then thredding, with passivation being the last step
All the items are inspected during the process and before shipping, complying with ISO Working Instruction
Inspection Tools: Calipers, Protrusion-height gage, Micrometer, 2.5D and 2D projector
Measurement Points: Head diameter, Head height, Grip gaging body diameter, Twisted thread length, Major diameter, Minor diameter, Thread angle, Pitch


  • Twisted Thread


  • Item Specification: #2*1/2”
  • Item Material: 316 SS