Pan Head Phillips Drilling Tail | Screw Manufacturing for 50 Years | Sen Chang
Sen Chang Industrial Co., Ltd., since 1968, is a Pan Head Phillips Drilling Tail | 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.
Process: Using multi blow header to make the head and then rolling before acid washing and heat treating. At last spray painting on the head part
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
Screw Measurement Points: Head diameter, Head height, Thread length, Major diameter, Minor diameter, Thread angle, Pitch, Paint surface inspection