TE Connectivity RNF-100-3 4-BK-FSP Heat Shrink Tubing

TE Connectivity's Raychem RNF-100-3 4-BK-FSP heat shrink tubing is a black, 2:1 shrink-ratio, single-wall sleeve engineered for electrical insulation and mechanical protection of automotive and industrial wiring. Made from irradiated modified polyolefin, the tubing is semi-flexible to accommodate modest bends without kinking while maintaining a protective layer around conductors, splices, and connectors. When correctly installed with heat, RNF-100-3 shrinks to a final outside diameter of 9.5 mm (0.374 in), providing a snug sheath that resists abrasion and environmental exposure. The RNF-100 family is designed for automotive component protection, offering durable shielding against moisture, dust, and minor mechanical abrasion while preserving flexibility. The 4-BK-FSP variant denotes a black sleeving option in this series, aligning with TE's Raychem heat-shrink portfolio and standard installation practices for automotive and electrical assemblies.