Duro Dyne 25203 Cupped Washer Weld Pin 1-1/8 Inches

Product Description

The DURO DYNE 25203 is a cupped washer weld pin designed for mechanical fastening in sheet metal ductwork and HVAC insulation applications. The cupped washer profile holds insulation blanket or liner firmly against duct surfaces after the pin is stud-welded in place. At 1-1/8 inches in length, this pin is sized for standard insulation thickness commonly used in commercial and residential air handling systems. HVAC sheet metal workers and ductwork fabricators install these as part of a complete weld pin and washer insulation attachment system.

This weld pin is used in ductwork fabrication shops and field installation settings where insulation must be mechanically secured to interior or exterior duct surfaces. It is compatible with standard capacitor-discharge (CD) stud welding equipment used in the HVAC trade. The 1-1/8 inch length suits applications where moderate insulation thickness requires a reliable mechanical hold without penetrating the duct wall.

Key Features

• Cupped washer design retains insulation blanket or liner securely against duct surfaces
• 1-1/8 inch length suited for standard duct insulation thickness
• Designed for use with capacitor-discharge stud welding systems
• Consistent pin geometry supports repeatable, production-rate installation
• Part of the DURO DYNE BAB118 weld pin product line

Compatibility

Designed as an OEM-style replacement and standard-supply weld pin for capacitor-discharge stud welding systems used in HVAC ductwork insulation attachment applications.

Installation Notes

Weld pins of this type are installed by licensed sheet metal workers and HVAC ductwork fabricators using capacitor-discharge stud welding equipment. Ensure welding equipment settings are appropriate for the pin base diameter and substrate metal gauge before production runs. Follow SMACNA guidelines and applicable local mechanical codes for insulation attachment requirements. Inspect each welded pin for full fusion at the base before applying the retaining washer.

Technical Specifications

• Pin Length: 1-1/8 inches
• Pin Style: Cupped Washer Weld Pin
• Product Line: BAB118

Standard Information

• Brand: DURO DYNE
• Manufacturer Part Number: 25203