Large Heavy 1-1/8” A194 2H Carbon Nut

I.Steel construction is the most extensive application field. In high-rise steel frame buildings, highway overpasses, railway steel bridges and large factory workshop girders, these black 2H nuts clamp thick structural steel plates, beam-column joints and support brackets. Their expanded bearing area uniformly disperses pre-tightening force, eliminating local indentation on steel substrates and resisting loosening caused by long-term traffic vibration, wind load and alternating dynamic stress. The black oxide layer also avoids reflective glare on exposed outdoor steel structures and offers basic corrosion resistance in dry inland construction environments.

II.Energy infrastructure widely adopts this fastener as well. For thermal power plant boiler supports, wind turbine tower base flanges, transformer foundation frames and substation steel structures, 1-1/8" 2H black nuts secure large bolted connections enduring continuous mechanical vibration and temperature cycling. In onshore oil and gas pipeline flange assemblies, they seal high-pressure medium joints; the black coating prevents surface oxidation during storage and field assembly before anti-corrosion paint application.

III.Heavy engineering machinery and mining equipment also depend on these nuts. They assemble crane main beams, hydraulic press frames, mine excavator chassis and large conveyor rack connections, reliably sustaining static heavy loads and frequent impact loads. Besides, they are used in non-critical marine on-deck steel supports under covered facilities, where the black finish delivers temporary rust prevention before full anti-corrosion painting.

We are certified by ISO9001:2015, IATF16949:2016, and other international quality standard certifications.

Long-term quality warranty and comprehensive after-sales service are provided.