Drill collars For Sale, 4-3/4″, NC38/3.5″ IF connection, 50lb/ft. $500.00 Drill collars For Sale, 4-3/4″, NC38/3.5″ IF connection, 50lb/ft. Drill Collars August 12, 2021 Drill collar, 4-3/4″, NC38/3.5″ IF connection, 50lb/ft. Spiral Drill Collars 33 Available Inspected to DS1 – White Band Marked $500 / ton