An NC thread coupling adapter (female-to-female) is a threaded mechanical connector used to join two male-threaded drill rods or components that have NC (National Coarse) threads. These adapters are commonly used in drilling, mining, geotechnical, and construction industries to extend drill strings or connect tools and accessories.
- Design: Threading on both ends are internally threaded to match specific NC thread sizes (e.g., NC31 = 2⅜” Reg, NC38 = 2⅞” Reg).Precision-machined for tight fit and leak-free connections. Through Bore / Pass-through Design is an internal bore is unobstructed, allowing fluid, air, or mechanical force transmission through the adapter.
- Applications:
- Drilling Operations – Extending drill strings in blast hole, water well, geothermal, or exploration drilling; connecting drill rods, subs, stabilizers, and bit subs
- Mining and Quarrying -Used in rotary and DTH (down-the-hole) drilling rigs
- Geotechnical and Environmental Sampling -Connects casing or tooling during soil sampling, SPT, CPT, or core drilling
- Construction and Foundation Work -Joining components in piling rigs, micropiles, and anchor drilling systems
- Materials:The body is heat-treated alloy steel for high tensile strength and impact resistance
- Configuration:
- Thread Type (left side): 1″NC
- Thread Type (right side): R32, R38, or T38
- Overall Length: 3″, 5″, 7.5″, 24″, 30″
- Heat-treated or non-heat-treated