Duro Dyne 15156 Self Piercing Self Threading Hex Head Screw 8 X 3/4 Inches

Product Description

The Duro Dyne 15156 is a self piercing and self threading hex head screw designed for HVAC sheet metal and ductwork fabrication. Built for trade professionals who need a fast, reliable fastener without the extra step of pre-drilling, this screw creates its own hole as it drives. The sharp cone point acts like a scratch awl, piercing light gauge steel and forming a threaded cone hole as the screw advances. This eliminates the need for a separate drill bit or punch, saving time on the job. HVAC technicians and sheet metal workers rely on screws like this for ductwork assembly, flanged connections, and general sheet metal joining tasks. The 15156 features a size 8 shank measuring 3/4 inches in length and is driven with a 1/4 inch external hex head, making it compatible with standard hex drivers and nut setters used every day in the field. The head is hexagonal slotted, giving you the option to drive with a hex bit or a flat blade screwdriver in tight spots. Cold heading quality steel provides strong, consistent hardness throughout. The case hardened construction reaches a minimum Rockwell C55 rating, meaning the tip stays sharp and the threads hold their form even when piercing steel. A zinc plated finish delivers corrosion resistance for installations in areas exposed to moisture, condensation, or variable temperatures. The twin lead point design features two continuous threads that speed up engagement and reduce the effort needed to drive the screw into sheet metal. The 15156 meets or exceeds JIS 1125 specifications for cone point screws, giving contractors confidence in a fastener built to a recognized industry standard. This screw is rated for maximum drilling thickness of 0.04 inches, making it well suited for light gauge steel ductwork and HVAC panel applications.

• Self piercing tip eliminates pre-drilling on light gauge steel ductwork
• Twin lead double thread point for fast engagement and reduced drive effort
• Case hardened to Rockwell C55 minimum for long lasting sharpness and thread integrity

Product Highlights

The Duro Dyne 15156 self piercing screw is a purpose-built HVAC fastener that speeds up sheet metal assembly by combining piercing and threading in a single step. Its zinc plated, case hardened construction meets JIS 1125 standards and holds up in demanding ductwork environments.

Product Information

Standard Information

• Brand: DURO DYNE
• Manufacturer Part Number: 15156

Technical Specifications

• Screw Size: 8
• Length: 3/4 inches
• Drive Type: External Hex
• Drive Size: 1/4 inches
• Head Type: Hexagonal Slotted
• Tip Type: Self Piercing
• Material: Cold Heading Quality Steel
• Finish: Zinc Plated
• Head Color: Silver
• Hardness: Rockwell C55 Minimum
• Max Drilling Thickness: 0.04 inches
• Thread Design: Twin Lead Double Continuous Thread
• Conformance: Meets or Exceeds JIS 1125 Cone Point Screw Specifications
• System of Measurement: Inch