ASTM A194 Grade 2H PTFE-Coated Heavy Hex Nuts

ASTM A194 Grade 2H PTFE-coated heavy hex nuts combine the high-strength performance of heat-treated carbon steel with a corrosion-resistant, low-friction PTFE coating. RAM Threading supplies coated 2H heavy hex nuts for demanding bolting applications where strength, corrosion protection, and consistent installation torque are critical.

PTFE-coated 2H nuts are commonly paired with ASTM A193 B7 stud bolts, including PTFE-coated B7 studs, to create a durable bolting assembly for harsh industrial environments.

Key Features

• ASTM A194 Grade 2H carbon steel construction
• Heat-treated for high strength and durability
• PTFE coating provides enhanced corrosion resistance
• Reduced coefficient of friction for smoother installation
• Helps minimize galling and thread seizure
• Promotes more consistent torque and preload
• Heavy hex design provides increased bearing surface
• Available for use with ASTM A193 B7 stud bolts
• Suitable for high-pressure and high-temperature bolting applications

Applications of PTFE-Coated 2H Heavy Hex Nuts

PTFE-coated ASTM A194 Grade 2H heavy hex nuts are well suited for applications where standard carbon steel fasteners may be exposed to moisture, chemicals, or corrosive industrial environments.

Common applications include:

• Oil & gas refineries
• Petrochemical facilities
• Chemical processing plants
• Offshore and marine environments
• Industrial piping systems
• Flanged connections
• Pressure vessels
• Heat exchangers
• Power generation facilities

Commonly Paired With PTFE-Coated B7 Stud Bolts

ASTM A194 Grade 2H PTFE-coated heavy hex nuts are frequently paired with ASTM A193 Grade B7 PTFE-coated stud bolts.

Using a coated nut and stud bolt together provides corrosion protection throughout the bolted assembly while reducing friction between mating threads. The lower friction can help produce more predictable tightening and clamping force during installation.

The B7 and 2H combination is widely used in high-pressure and high-temperature flange bolting applications throughout the oil & gas, refining, petrochemical, and industrial processing industries.

Why Use PTFE-Coated 2H Nuts?

PTFE coatings provide an additional layer of protection for Grade 2H heavy hex nuts operating in corrosive or exposed environments.

Corrosion Resistance

The coating helps protect the carbon steel substrate from moisture, chemicals, salt exposure, and other environmental contaminants.

Reduced Friction

PTFE provides a low-friction surface that allows the nut to move more smoothly along the stud bolt during installation.

More Consistent Torque

Reducing friction can improve the relationship between applied torque and bolt tension, helping installers achieve more consistent preload across a bolted joint.

Galling and Seizure Resistance

The lubricious coating reduces metal-to-metal contact between mating threads, helping minimize binding, galling, and thread seizure.

PTFE-Coated vs. Plain 2H Heavy Hex Nuts

Plain 2H heavy hex nuts are a reliable and economical choice for high-strength bolting applications where exposure to corrosive conditions is limited.

PTFE-coated 2H heavy hex nuts provide the same underlying Grade 2H strength while adding enhanced corrosion protection and reduced friction. They are generally preferred for outdoor, chemical processing, petrochemical, refinery, offshore, and other corrosive applications.

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