This paper presents sub-Terahertz (THz) channel characterization and modeling for an indoor industrial scenario based on radio propagation measurements at 142 GHz in four factories. The study selected 82 transmitter-receiver (TX-RX) locations in both line-of-sight (LOS) and non-LOS (NLOS) conditions and collected over 75,000 spatial and temporal channel impulse responses. The TX-RX distance ranged from 5 to 87 m. Steerable directional horn antennas were used at both ends, and measurements were conducted with low and high RX antenna heights of 0.5 m and 1.5 m to characterize the propagation channel for close-to-floor applications. Results show that low RXs experience an average path loss increase of 10.7 dB and 6.0 dB at LOS and NLOS locations, respectively. Channel enhancement measurements using a steerable large flat metal plate as a passive reflecting surface demonstrated omnidirectional path loss reduction from 0.5 to 22 dB with a mean of 6.5 dB. This paper presents the first statistical channel characterization and path loss modeling for industrial scenarios at sub-THz frequencies, highlighting the potential for ultra-broadband factory communications in the 6G era. The study conducted extensive measurements in four factory buildings in Brooklyn, NY, using steerable directional horn antennas, resulting in 20 LOS, 58 NLOS, and four outage location pairs. The paper details the four factory environments, measurement equipment, and procedures used to achieve a complete angular channel profiling. Directional and omnidirectional path loss modeling with polarization effects and comprehensive statistical analysis of temporal and spatial channel parameters for the indoor factory (InF) scenario are presented. The extracted factory channel characteristics are compared to previous measurement results in InH and urban environments. The paper also demonstrates a signal enhancement approach by deploying a rotatable flat metal plate as a passive reflecting surface, showing that the omnidirectional received power increases from 0.5 dB to 22 dB with a mean of 6.5 dB. The study provides insights into the impact of antenna height on channel characteristics, showing that low RXs experience higher path loss and larger angular spreads compared to high RXs. The results highlight the importance of antenna height in factory communications and the potential for ultra-broadband communications in the 6G era.This paper presents sub-Terahertz (THz) channel characterization and modeling for an indoor industrial scenario based on radio propagation measurements at 142 GHz in four factories. The study selected 82 transmitter-receiver (TX-RX) locations in both line-of-sight (LOS) and non-LOS (NLOS) conditions and collected over 75,000 spatial and temporal channel impulse responses. The TX-RX distance ranged from 5 to 87 m. Steerable directional horn antennas were used at both ends, and measurements were conducted with low and high RX antenna heights of 0.5 m and 1.5 m to characterize the propagation channel for close-to-floor applications. Results show that low RXs experience an average path loss increase of 10.7 dB and 6.0 dB at LOS and NLOS locations, respectively. Channel enhancement measurements using a steerable large flat metal plate as a passive reflecting surface demonstrated omnidirectional path loss reduction from 0.5 to 22 dB with a mean of 6.5 dB. This paper presents the first statistical channel characterization and path loss modeling for industrial scenarios at sub-THz frequencies, highlighting the potential for ultra-broadband factory communications in the 6G era. The study conducted extensive measurements in four factory buildings in Brooklyn, NY, using steerable directional horn antennas, resulting in 20 LOS, 58 NLOS, and four outage location pairs. The paper details the four factory environments, measurement equipment, and procedures used to achieve a complete angular channel profiling. Directional and omnidirectional path loss modeling with polarization effects and comprehensive statistical analysis of temporal and spatial channel parameters for the indoor factory (InF) scenario are presented. The extracted factory channel characteristics are compared to previous measurement results in InH and urban environments. The paper also demonstrates a signal enhancement approach by deploying a rotatable flat metal plate as a passive reflecting surface, showing that the omnidirectional received power increases from 0.5 dB to 22 dB with a mean of 6.5 dB. The study provides insights into the impact of antenna height on channel characteristics, showing that low RXs experience higher path loss and larger angular spreads compared to high RXs. The results highlight the importance of antenna height in factory communications and the potential for ultra-broadband communications in the 6G era.