3M 421 Lead Foil Discs

The 3M 421 die cut lead discs are backed with a rubber adhesive, offering excellent conformability in a variety of application conditions. These round lead discs perform well in a wide variety of termperature conditions. Electrically and thermally conductive. 

Product Features

• Temperature rating: -60° to 225° F / -54° to 106° C
• Good thermal properties
• Performs well in a range of temperature conditions
• Dark silver color
• Rubber (green) adhesive
• Lead foil backing
• All die cuts 3/8" or larger come standard with a split-back liner; Split liner for smaller dimensions upon request
• Used for a variety of applications (see spec sheet)

Construction

• 4 Mil Aluminum Foil Backing
• 6.6 Mil Total Thickness
• Roll Length - 36 yards

Specifications

• Tensile Strength (lb/in) - 15
• Elongation (%) - 14
• Steel Adhesion (oz/in) - 45