3M 7000021421 FP-301 Heat Shrink Tubing 1/2 in Black 100 Ft

Product Description

The 3M 7000021421 is a thin-wall heat shrink tubing sold as a 100-foot spool in black, part of the FP-301 product line. It is designed to provide electrical insulation, strain relief, and environmental protection on wire splices, terminals, and cable bundles. The FP-301 series is rated for a broad range of industrial and military applications, offering a reliable balance of electrical, physical, and chemical resistance properties. Electricians, panel builders, and wire harness assemblers use this tubing as a standard sleeving solution wherever a clean, durable insulated finish is required.

This tubing is suited for residential and commercial electrical work, industrial wiring, and military-specification applications. The 1/2-inch diameter size accommodates a range of conductor and connector sizes commonly encountered in control panel wiring, wire bundling, and terminal insulation. It is available in a 100-foot spool format for bench or field use, with a case quantity of 300 feet for higher-volume jobs.

Key Features

• Thin-wall construction provides a low-profile insulated finish on conductors and terminals
• Black color for standard identification and UV concealment in wiring assemblies
• 100-foot spool format allows easy dispensing during panel builds or field repairs
• Balanced electrical, physical, and chemical properties suitable for industrial and military use
• FP-301 series rated for a wide variety of sleeving and insulation applications

Compatibility

Designed as an OEM-style sleeving solution for wire splices, terminals, connectors, and cable bundles in industrial, commercial, and military electrical assemblies requiring a 1/2-inch thin-wall heat shrink sleeve.

Installation Notes

Installation is typically performed by licensed electricians or qualified wire harness technicians. De-energize all circuits completely before applying heat shrink tubing to any conductor or terminal. Use a calibrated heat gun set to the appropriate shrink temperature and move it evenly along the tubing to prevent scorching or uneven shrinkage. Follow applicable NEC guidelines for insulation and sleeving requirements in your specific application.

Technical Specifications

• Diameter: 1/2 inch
• Color: Black
• Spool Length: 100 feet
• Case Quantity: 300 feet
• Unit of Measure: Foot
• Weight: 0.02 pounds
• UPC: 00051135355862

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7000021421