Indented Hex Washer Head Screw

Indented hex washer head screw selfdrilling Dacromet Coated on the Screw Surface / 45 years of experiences for production stainless steel fasteners.

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Indented Hex Washer Head Screw | Screw Manufacturing for 50 Years | Sen Chang

Sen Chang Industrial Co., Ltd., since 1968, is a Indented Hex Washer Head Screw | 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 Washer Head Screw


Process: Using multi blow header to make the head and then threading before passivation. At last surface coating
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: Across the flat and corner of the hex, Washer diameter, Washer height, Thread length, Major diameter, Minor diameter, Thread angle, Pitch, Flat tail length, Flat tail diameter
Nylok Inspection
Nylok Coating Report Offered


  • Flat Tail
  • Dacromet Coated


  • Item Specification: #10-32*2”
  • Item Material: 410 SS