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Brady B-342 PermaSleeve labels are designed to keep pace with production and maintenance environments where wire identification must be both fast and permanent. Operators can print sleeves up to 50 characters in length before shrinking, allowing flexibility in labeling complex wiring systems.
Once applied, the 3:1 shrink ratio ensures a tight, uniform fit around wires and cables. This eliminates the risk of labels slipping or rotating—common issues in control panels and wire harness assemblies.
The material’s resistance to chemicals, oils, and environmental exposure ensures that labels remain legible throughout the lifecycle of the equipment. This is critical in reducing rework and avoiding misidentification during maintenance or troubleshooting.
Thermal transfer printing supports high DPI output, enabling clear text and barcode symbologies even in small formats. Print speed can be optimized without sacrificing quality, helping operations teams maintain throughput while ensuring long-term durability.
For complete labeling systems, pair with Brady Barcode Printers and compatible Brady R6600 Ribbon to ensure full-stack performance.
Designed for rigorous wire marking applications, PermaSleeve® PS Heat Shrink Polyolefin (B-342) sleeves combine speed, ease of use, and permanence to create high quality labeling.
| Part Number | M21-375-C-342-YL |
| Product Number | 139753 |
| UPC | 754473930646 |
| UOM | Cartridge of 7 ft |
| Brand Name | Brady |
| Application | Electrical Labeling, Wire and Cable Labeling |
| Approval/Compliance (EMEA) | UL Recognised to UL224, SAE-AMS-DTL-23053/5 C (Class 1), SAE AS-81531 |
| Brady Material Number | B-342 |
| Color | Black on Yellow |
| Continuous or Die-cut | Continuous |
| Diameter as Supplied (imperial) | 0.375 in |
| Diameter as Supplied (metric) | 9.53 mm |
| Dimensions (imperial) | 0.645 in H x 7 ft L |
| Dimensions (metric) | 16,38 mm (H) x 2,13 m (L) |
| Enables Industry Compliance (North America) | ASTM D 2671, ASTM E 162, ASTM E 662, ASTM G 155, MIL-STD-202, SAE-AMS-DTL-23053, SAE-AS-81531, UL Recognized |
| Finish | Matte |
| Height (imperial) | 0.645 in |
| Height (metric) | 16.38 mm |
| Industry Compliance UL | UL224 |
| Label Properties | Heat Shrink |
| Length (imperial) | 7 ft |
| Length (metric) | 2.13 m |
| Material | Heat-shrink Polyolefin |
| Material Properties | Flame-retardant, Heat-shrinkable |
| Material Type | Polyolefin |
| Maximum Service Temperature (°C) | 135 °C |
| Maximum Service Temperature (°F) | 275 °F |
| Maximum Wire Diameter (imperial) | 0.32 in |
| Maximum Wire Diameter (metric) | 8.13 mm |
| Maximum Wire Gauge | 4 AWG |
| Minimum Service Temperature (°C) | -55 °C |
| Minimum Service Temperature (°F) | -67 °F |
| Minimum Wire Diameter (imperial) | 0.125 in |
| Minimum Wire Diameter (metric) | 3.18 mm |
| Minimum Wire Gauge | 12 AWG |
| Primary Noun, Basic Function.1 | Sleeve |
| Print Technology | Thermal Transfer |
| Printer Compatibility | M210, M210-LAB, M211, BMP21-PLUS, BMP21-LAB, IDPAL, LABPAL |
| Printer and Label Applications | Wire & Cable |
| Printer supply or Pre-printed | Printer supply |
| Recovered Diameter (imperial) | 0.375 in |
| Recovered Diameter (metric) | 9.53 mm |
| Resistance Properties | Chemical-resistant, Corrosion-resistant, Humidity-resistant, Smear-resistant, UV-resistant, Weather-resistant |
| Ribbon Series | R4300 |
| Roll Length (imperial) | 7 ft |
| Roll Length (metric) | 2.13 m |
| SAP B-Number | B-342 |
| SAP Local Description | CART M21 B342 .645 in X 7 ft PERMASLEEVE YEL |
| Service Temperature Range (°C) | -55 °C - 135 °C |
| Service Temperature Range (°F) | -67 °F - 275 °F |
| Shrink Ratio | 3:1 |
| Sleeve Size (imperial) | 0.375 in Dia x 7 ft L |
| Sleeve Size (metric) | 9.53 mm Dia x 2.13 m L |
| Smart Cell | Yes |
| Trade Name | PermaSleeve |
| Wire Diameter Range (imperial) | 0.125 in to 0.32 in |
| Wire Diameter Range (metric) | 3.18 mm to 8.13 mm |
| Wire Gauge Range | 12 AWG - 4 AWG |
| CA Prop 65 Label Warning | WARNING: Cancer - www.P65warnings.ca.gov |
| CA Prop 65 Labeled? | Y |
| Contains CA PROP 65 Substance | Yes Contains-Label required |
| Contains CA PROP 65 Substance (Y/N) | Y |
| Contains CA PROP 65 Warning Type | Cancer |
| EU RoHS Compliance | Pass 2011/65/EU(Pass 2015/863) |
| EU RoHS Compliant | Yes |
| SDS Safety Data Sheet required | No = MSDS/SDS is not required |
Brady - The Leader in Industrial Labeling Solutions
Brady is a leading global manufacturer of high-performance labels and printing supplies for a wide range of industrial applications. Brady barcode labels are available in a variety of sizes, shapes and colors and are designed to work specifically with Brady label printers.
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