Chamfered Hex Washer Head Drilling Screw - 410 Stainless Steel Self-Drilling Tapping Fastener

High-Quality 410 SS Hex Washer Head Drilling Screws with Chamfered Design, Multi-Blow Header Manufacturing and ISO Compliant Inspection

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How Can Self-Drilling Screws Reduce Installation Time in Metal Roofing Applications?

Our chamfered hex washer head drilling screws eliminate pre-drilling requirements with #3 drilling tapping capability, reducing installation time by up to 40% in metal roofing assemblies. The 5/16" hex design provides optimal torque transfer while the chamfered washer head ensures weather-tight sealing. With 410 SS construction and salt spray testing, these fasteners deliver long-term corrosion resistance for exterior applications. Contact us for custom specifications tailored to your metal building systems.

Manufactured with ISO Working Instruction compliance, our 410 stainless steel drilling screws deliver exceptional corrosion resistance and mechanical strength for demanding industrial applications. The complete manufacturing process includes in-process and pre-shipment inspections to ensure consistent quality and dimensional accuracy. With 45 years of fastener manufacturing expertise and advanced passivation treatment, these hex washer head drilling screws provide reliable performance in metal-to-metal fastening applications across HVAC, automotive, construction, and industrial equipment sectors. The self-drilling tapping design reduces installation time and labor costs while maintaining superior holding power and long-term durability in challenging environmental conditions.


Chamfered Hex Washer Head Drilling Screw

TV003-151127-1

Process: Using multi blow headers to make the head, to thread, and then slot 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: Across the flat and corner of the hex, Thread length, Major diameter, Minor diameter, Thread angle, Pitch, Drilling diameter, Drilling tapping length

Features

  • Chamfered Hex Washer Head
  • Chamfered under Head
  • 5/16”Across the Flat of the Hex
  • #3 Drilling Tapping

Specification

  • Item Specification: #8-18*1 1/4”
  • Item Material: 410 SS