Flange Washer Head Machine Screw | Precision Machine Screws for Secure Fastening in Industrial Applications | Sen Chang

Flange Washer Head Machine Screw w/ Six Lobe Recess w/ pin, Clockwise Serration under the head. | Innovative Coating Screws: Combining Aesthetics with Corrosion Resistance

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Flange Washer Head Machine Screw | Taiwan High Tensile Screws: The Backbone of Durability in Fastener Technology | Sen Chang

Located in Taiwan since 1968, Sen Chang Industrial Co., Ltd. has been a renowned manufacturer in the fasteners industry, especially in producing high-quality stainless steel wires and various screws like Flange Washer Head Machine Screw, machine screws, tapping screws, and high tensile screws. Their commitment to quality is evident in their adherence to ISO9001 standards, ensuring each fastener meets rigorous quality control.

With a rich heritage in fastener manufacturing, Sen Chang specializes in both standard and custom-made solutions, catering to diverse industrial needs. Utilizing top-grade materials from renowned steelworks and cutting-edge manufacturing technologies, Sen Chang produces fasteners with unparalleled tensile strength, setting industry benchmarks. Their rigorous adherence to ISO9001 standards ensures that each product meets the highest quality and durability criteria.

Sen Chang has been supplying customs high tensile strength screws and fasteners, both with advanced technology and 48 years of experience, Sen Chang ensures each customer's demands are met.

Flange Washer Head Machine Screw


Process: Using multi blow headers to make the head then threading before passivation
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, 6-lobe Recess depth, Pin diameter, Washer diameter, Washer height, Number of serration under the head, Thread length, Major diameter, Minor diameter, Thread angle, Pitch, Ring gage GO/NO GO


  • Flange Washer Head
  • Security PIN
  • Clockwise of 18 Serration under the Head


  • Item Specification: M4*12mm
  • Item Material: 18-8 SS