B7 Thread Rod

PTFE Coated ASTM A193 B7 Threaded Rod with A194 2H Heavy Hex Nuts

PTFE Coated ASTM A193 B7 Threaded Rod with A194 2H Heavy Hex Nuts – Fully threaded stud bolt per ASTM A193 Grade B7 (chromium-molybdenum steel, 125 ksi min tensile / 105 ksi min yield). PTFE coating (e.g., Teflon, Xylan) provides chemical resistance, low friction coefficient (µ ≈ 0.05–0.10), anti-galling, and temperature stability up to 315°C (600°F). Paired with ASTM A194 Grade 2H heavy hex nuts (heat-treated carbon steel, 200 ksi min proof stress). Complete assembly suitable for high-temperature, high-pressure, and corrosive environments. Applications: flanged connections, pressure vessels, valves, piping systems, chemical processing, marine, and oil & gas. Available in blue, red, or green PTFE finish.

PTFE Coated ASTM A193 B7 Threaded Rod with A194 2H Heavy Hex Nuts – Fully threaded stud bolt per ASTM A193 Grade B7 (chromium-molybdenum steel, 125 ksi min tensile / 105 ksi min yield). PTFE coating (e.g., Teflon, Xylan) provides chemical resistance, low friction coefficient (µ ≈ 0.05–0.10), anti-galling, and temperature stability up to 315°C (600°F). Paired with ASTM A194 Grade 2H heavy hex nuts (heat-treated carbon steel, 200 ksi min proof stress). Complete assembly suitable for high-temperature, high-pressure, and corrosive environments. Applications: flanged connections, pressure vessels, valves, piping systems, chemical processing, marine, and oil & gas. Available in blue, red, or green PTFE finish.

Product Details

Product Introduction
Fully threaded stud rod manufactured from ASTM A193 Grade B7 chromium‑molybdenum alloy steel, quenched and tempered for high‑temperature, high‑pressure bolting. The stud is coated with a PTFE fluoropolymer (Xylan 1424 type, blue), supplied as a complete assembly with two ASTM A194 Grade 2H heavy hex nuts. This bolting set is the industry standard for ASME B16.5 flanged connections, pressure vessels, valves, and piping systems in oil and gas, petrochemical, and power generation applications.

Material & Mechanical Properties
ASTM A193 Grade B7 base metal: quenching in liquid medium and tempering at a minimum of 1100 °F (593 °C). Certified tensile, yield, elongation, reduction of area, and hardness values are traceable per heat lot. Maximum continuous service temperature for the alloy is 450 °C (842 °F). Every stud ⅜″ and larger is stamped with the grade symbol “B7”, manufacturer’s identification mark, and heat code for full traceability to its mill test report.

PTFE Coating
The PTFE (Xylan 1424) coating is applied after heat treatment and thread rolling. Dry-film thickness ranges from 15–35 microns, delivering a coefficient of friction of 0.055–0.10 and a nut factor (K) of approximately 0.12. This reduces make‑up torque by up to 70 % compared to uncoated fasteners and provides a consistent torque‑tension relationship for preload control. Salt spray resistance exceeds 1,000 hours to first red rust per ASTM B117. The coating is chemically inert, prevents galling, and allows clean disassembly after prolonged service. Coating service temperature is –50 °C to +210 °C.

Geometry, Thread & Nut Pairing
Continuous full‑length thread, UN/UNC to ASME B1.1, Class 2A fit. For flange bolting above 1″ diameter, 8UN thread is standard. Metric sizes are also available. Dimensional conformity to ASME B18.31.2. The matched nuts are ASTM A194 Grade 2H heavy hex, quenched and tempered to 24–35 HRC with a minimum proof load stress of 175,000 psi. Substituting a lower‑grade nut compromises assembly capacity.

Certification
Assemblies can be supplied with EN 10204 Type 3.1 inspection certificates upon request, covering base material and coating conformance. Full traceability from heat number to final lot is maintained.

 

Technical Parameters

Place of Origin CHINA
Standard PTFE Coated ASTM A193 B7 Threaded Rod with A194 2H Heavy Hex Nuts
HS CODE 7318159001
Brand Name QBH
Certification ISO9001
Material 35K, 40Cr, 35CrMo, SCM435，etc.
Size M3-M64
Production Process Cold forging≤300mm, Hot forging≤1000mm
Class 4.8/ 6.8/ 8.8/ 10.9/ 12.9
Delivery Time Within 30 Days

 

Product Introduction
Fully threaded stud rod manufactured from ASTM A193 Grade B7 chromium‑molybdenum alloy steel, quenched and tempered for high‑temperature, high‑pressure bolting. The stud is coated with a PTFE fluoropolymer (Xylan 1424 type, blue), supplied as a complete assembly with two ASTM A194 Grade 2H heavy hex nuts. This bolting set is the industry standard for ASME B16.5 flanged connections, pressure vessels, valves, and piping systems in oil and gas, petrochemical, and power generation applications.

Material & Mechanical Properties
ASTM A193 Grade B7 base metal: quenching in liquid medium and tempering at a minimum of 1100 °F (593 °C). Certified tensile, yield, elongation, reduction of area, and hardness values are traceable per heat lot. Maximum continuous service temperature for the alloy is 450 °C (842 °F). Every stud ⅜″ and larger is stamped with the grade symbol “B7”, manufacturer’s identification mark, and heat code for full traceability to its mill test report.

PTFE Coating
The PTFE (Xylan 1424) coating is applied after heat treatment and thread rolling. Dry-film thickness ranges from 15–35 microns, delivering a coefficient of friction of 0.055–0.10 and a nut factor (K) of approximately 0.12. This reduces make‑up torque by up to 70 % compared to uncoated fasteners and provides a consistent torque‑tension relationship for preload control. Salt spray resistance exceeds 1,000 hours to first red rust per ASTM B117. The coating is chemically inert, prevents galling, and allows clean disassembly after prolonged service. Coating service temperature is –50 °C to +210 °C.

Geometry, Thread & Nut Pairing
Continuous full‑length thread, UN/UNC to ASME B1.1, Class 2A fit. For flange bolting above 1″ diameter, 8UN thread is standard. Metric sizes are also available. Dimensional conformity to ASME B18.31.2. The matched nuts are ASTM A194 Grade 2H heavy hex, quenched and tempered to 24–35 HRC with a minimum proof load stress of 175,000 psi. Substituting a lower‑grade nut compromises assembly capacity.

Certification
Assemblies can be supplied with EN 10204 Type 3.1 inspection certificates upon request, covering base material and coating conformance. Full traceability from heat number to final lot is maintained.

 

Technical Parameters

Place of Origin CHINA
Standard PTFE Coated ASTM A193 B7 Threaded Rod with A194 2H Heavy Hex Nuts
HS CODE 7318159001
Brand Name QBH
Certification ISO9001
Material 35K, 40Cr, 35CrMo, SCM435，etc.
Size M3-M64
Production Process Cold forging≤300mm, Hot forging≤1000mm
Class 4.8/ 6.8/ 8.8/ 10.9/ 12.9
Delivery Time Within 30 Days

 

FAQ

1. How do you let me trust you.

Jiaxing City Qunbang Hardware Co.,ltd hs its own right of import and export,QBH trademark in China,United States,European Union have been registered.At the same time,you can also check the registration information of our company in the China industry and Commerce system.

 

2. How about your price.

We will be based on different markets,for different quality and quantity,tailor-made prices for customers,in order to achieve win-win goal.

 

3. How do you control your quality.

Incoming quality contral( IQC)→Process Quality control(PQC)→Output quality control(OQC),and the random samples is sent to TUV for testing.If the customer received the goods and found quality problems,QBH company promises to be responsible for returning money or replenishing the goods

 

4. Could you provide free samples?

For new customer, We can provide free samples for standard fastener, But the clients will pay the express

charges. For old customer, We will send you free samples and pay express charges by ourself.

 

5. What is your packing.

Usually 25KG/carbon,36CTNS on the pallets,or 20-30kg/Bags,then on the pallet,QBH company personalized packagingis also available,like 10PCS/plastic bag or 10pcs/box,it can print some information

such as LOGO and pattern of customers.

 

6. What is your payment term

Normally,our terms of payment are TT and L/C,if we cooperate for a long time,we can reach the point of mutual trust,and fully support our customers to become bigger and stronger in the local market.Not only in the price concessions,but also in the payment can also be made on credit,Specific credit sales time needs to be negotiated separately.

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