Pan Head Plus Washer

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Pan Head Plus Washer | Screw Manufacturing for 50 Years | Sen Chang

Sen Chang Industrial Co., Ltd., since 1968, is a Pan Head Plus Washer | 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.

Pan Head Plus Washer


Process: Screw head shaping, thread rolling and washer molding before heat treating
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, 3 Wire gage, Inspection gage
Measurement Points: Head diameter, Head height, Rec penetration gaging depth, Length, Value C and D, Thread angle, Pitch
Flat Washer Measurement Points: Outside diameter, Height, Rec diameter


  • Double Triangular Tapping,48∘
  • Rolling+Flat Washer
  • Heat Treating Reports Offered


  • Item Size: M2*23
  • Available Material: 302HQ 304SS 305SS 316SS 410SS 420SS 430SS

Available Product

  • HeadDiameter M1.6~M16/#00~#5/8
  • Length 1/8”~12”/3.175mm~600mm