| Product Name | 3M™ Glass Cloth Tape 398FR |
| Part Number | 398FR |
| UPC Code | 00021200966699 |
| 3M ID | 7010334635 |
| Backing Material | Glass Cloth |
| Product Color | White |
| Overall Width (Imperial) | 0.75 inches |
| Overall Width (Metric) | 19.05 millimeters |
| Overall Length (Imperial) | 36 yards |
| Overall Length (Metric) | 32.9 meters |
| Total Tape Thickness (Imperial) | 7 mil |
| Total Tape Thickness (Metric) | 0.18 millimeters |
| Backing Thickness (Imperial) | 5 mil |
| Backing Thickness (Metric) | 0.13 millimeters |
| Adhesive Thickness (Imperial) | 2 mil |
| Adhesive Thickness (Metric) | 0.05 millimeters |
| Adhesive Type | Acrylic |
| Tensile Strength (Imperial) | 2080 oz/in |
| Tensile Strength (Metric) | 227.7 N/100mm |
| Elongation at Break | 7% |
| Minimum Operating Temperature (Fahrenheit) | -20°F |
| Minimum Operating Temperature (Celsius) | -29°C |
| Maximum Operating Temperature (Fahrenheit) | 250°F |
| Maximum Operating Temperature (Celsius) | 121°C |
| Core Size (Imperial) | 3 inches |
| Core Size (Metric) | 7.62 centimeters |
| Shelf Life | 24 months |
| Units per Case | 48 rolls |
| Smallest Saleable Unit | Roll |
| Indoor/Outdoor Rating | Indoor/Outdoor |
| Application Type | Splicing Flame-Retardant Tape |
| Specifications Met | ASTM D3330, D3652, D3758, F.A.R. 25.853(a), F.A.R. 25.855(d), Boeing BMS 5-146 Type I Class I Grade A, MIL A-3316C |
| Flame Retardant Compliance | F.A.R. Part 25.853(a), F.A.R. Part 25.855(d), EU Directive 2003/11/EC |
| Antimony Content | Antimony-free formulation |
| Brand | 3M™ |
| Industries | Aerospace, Automotive, Construction, General Industrial, Military & Government, Specialty Vehicles, Transportation |
| Liner Type | Blue polyethylene film with skip-slit design |
| Use Classification | Industrial/Occupational use only - Not for consumer sale |