Internal Hex Head Screw

Internal Hex Head Screw Rec Pin w/ Partially Threaded Machine Thread, Blue Nylok on the Thread / 45 years of experiences for production stainless steel fasteners.

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Internal Hex Head Screw | Screw Manufacturing for 50 Years | Sen Chang

Sen Chang Industrial Co., Ltd., since 1968, is a Internal Hex 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.

Internal Hex Head Screw


Process: Using multi blow header to make the head and then threading before passivation. At last thread nylok 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: Head diameter, Head height, Hex depth, Hex, Pin point diameter, Hex plug gauge, Grip gaging body diameter, Pointed thread length, Outside diameter of pointed thread, Minor diameter, Thread angle, Pitch
Nylok Inspection
Nylok Coating Reports Offered


  • 18-8 SS
  • Hex Rec w/ Pin
  • Partially Threaded (Pointed Thread)
  • Blue Nylok Coated(90°~180°)


  • Item Specification: M5-0.8*60
  • Item Material: 18-8 SS