CD INSULATION PIN .105 X 3.25 - 1000/PK

Capacitor Discharge (CD) Insulation Pins for Fast, Clean Fastening of Insulation to Metal Surfaces

Product Overview

These .105" x 3.25" CD insulation weld pins are engineered for use with capacitor discharge (CD) stud welding systems to quickly and securely attach rigid and semi-rigid insulation, duct liner, and acoustic/thermal insulation to sheet metal substrates. Sold in a bulk pack of 1,000 pins, this is the go-to fastener for HVAC contractors, sheet metal shops, insulation installers, and industrial fabricators who need a high volume of reliable, no-predrill attachment points.

Because CD stud welding fuses the pin base directly to the metal surface in a fraction of a second, there's no need for adhesives, clips, or mechanical fasteners that can loosen, corrode, or fail over time. The result is a fast, permanent, vibration-resistant bond ideal for ductwork, tanks, panels, and enclosures.

Key Specifications

• Pin Diameter: .105" (approx. 12 gauge)
• Pin Length: 3.25"
• Weld Method: Capacitor Discharge (CD) stud welding
• Pack Quantity: 1,000 pins per pack
• Material: Mild steel (copper-flashed for optimal weld conductivity)
• Typical Use: Insulation retention on metal ductwork, panels, and enclosures

Common Applications

• HVAC duct liner and duct wrap insulation attachment
• Mechanical insulation on tanks, boilers, and breeching
• Acoustic insulation panels in industrial equipment
• Sheet metal fabrication and enclosure lining
• Marine, automotive, and appliance insulation retention

Why Choose CD Insulation Pins

• Speed: Weld cycles complete in milliseconds, dramatically increasing installation throughput vs. adhesive or mechanical methods
• Strength & Durability: Creates a true fusion weld — not a surface bond — for long-term holding power that resists vibration, heat, and pressure
• No Surface Prep Required: No predrilling or tapping needed; pins weld directly to clean, unpainted metal
• Consistent Results: Uniform .105" x 3.25" sizing ensures compatible fit with standard insulation retention washers/clips
• Cost-Effective Bulk Packaging: 1,000-count pack reduces per-unit cost and minimizes reordering for high-volume jobs

Compatibility

Designed for use with standard CD (capacitor discharge) stud welding guns and systems. Pair with insulation retaining washers/speed clips for secure, code-compliant insulation installation.

Ideal For

HVAC contractors, mechanical insulation contractors, sheet metal fabricators, shipbuilders, industrial maintenance teams, and OEM manufacturers requiring reliable insulation fastening at scale.