Indented Hex Round Washer Bolt

Indented Hex Round Washer Bolt w/ Passivated Thread / 45 years of experiences for production stainless steel fasteners.

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Indented Hex Round Washer Bolt | Screw Manufacturing for 50 Years | Sen Chang

Sen Chang Industrial Co., Ltd., since 1968, is a Indented Hex Round Washer Bolt | 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.

Indented Hex Round Washer Bolt


Process: Using multi blow header to make the head and 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, Total length, Major diameter, Minor diameter, Thread angle, Pitch, Paint surface inspection
Passivation Report Offered


  • Passivation
  • Tensile Strength A2-80


  • Item Specification: M6-1.0*25
  • Item Material: 18-8 SS