PTFE Coated Studs

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Product Description

PTFE Coated Studs from ISO 9001:2015 certified manufacturer Ningbo Kaxite. B7 studs with 2H nuts coated in low-friction fluoropolymer — delivering long-term corrosion resistance, very low coefficient of friction, consistent tensioning and easy installation and removal. Outperforms hot-dip galvanized, cadmium and zinc plating in aggressive atmospheres. Also available: PTFE coated stud bolts, bolts, nuts and matched bolt-and-nut sets, plus coating service for existing fasteners. Free sample, OEM/ODM, wholesale pricing.

Product Detail

PTFE Coated Studs – Fluoropolymer Coated B7 Stud Bolts for Corrosive Flange Service | Model PTFE Coated Studs

PTFE Coated Studs are B7 stud bolts (or other base materials) coated with a low-friction fluoropolymer layer. The coating delivers three things traditional hot-dip galvanized, cadmium or zinc plating cannot: long-term corrosion resistance in aggressive atmospheres, a very low coefficient of friction for consistent tensioning, and easy installation and removal after years in service. The most widely specified combination is B7 studs with 2H nuts, used on flange joints across petrochemical, offshore, chemical and power plant piping.

BASE MATERIAL

B7 Studs
with 2H Nuts

COATING

PTFE
Fluoropolymer

KEY BENEFIT

Low
Friction

SERVICE

Corrosive
Atmosphere

Why PTFE Coated Fasteners Outperform Traditional Plating

Corrosion Resistance

PTFE coating resists acids, caustics, salt spray and industrial atmospheres that rapidly attack hot-dip galvanized, cadmium or zinc plated studs.

Low Friction

The very low coefficient of friction translates to accurate torque-to-tension behaviour — every stud in the flange is loaded to the same target, reducing leak paths.

Easy Removal

After years of service, PTFE coated studs release from the nut without galling or seizing — much faster turnaround during maintenance shutdowns.

PTFE Coating vs. Traditional Plating

Performance	Hot Dip	Cadmium	Zinc	PTFE
Corrosive atmosphere	Limited	Limited	Limited	Excellent
Coefficient of friction	High	High	High	Very low
Consistent tensioning	Variable	Variable	Variable	Repeatable
Install / removal	Hard	Hard	Hard	Easy
Life expectancy	Short	Medium	Medium	Long

Available Range

Our PTFE coated fasteners cover the full bolting hardware for flange joints, not just studs. All items can be supplied as matched sets or individually.

PTFE Coated Studs Full threaded studs, B7 base or other grades, PTFE coated over the entire length.	PTFE Coated Stud Bolts Stud bolts with chamfered ends, ready for assembly with 2H nuts.
PTFE Coated Bolts Hex head bolts, PTFE coated, for applications where studs are not suitable.	PTFE Coated Nuts 2H nuts, PTFE coated on all threads and faces for consistent friction.
PTFE Coated Bolts and Nuts Matched bolt-and-nut sets, coated together for guaranteed compatibility.	PTFE Coating Service Send us your existing studs or bolts — we coat them to the same specification.

Typical Applications

Petrochemical & Refinery Flange joints on hydrocarbon, acid and caustic piping.	Offshore & Marine Salt-spray exposure on platforms, decks and shipboard piping.
Chemical Plants Flanges handling acids, alkalis and aggressive process fluids.	Power Generation Steam and cooling water flange bolting where seizure is a concern.

Request Your PTFE Coated Stud Quotation

Tell us the stud size, thread, length, base material and quantity — or send us your flange bolt schedule. Reply within 24 hours.

Send Inquiry All Coated Fasteners

Frequently Asked Questions

Q1: What is a PTFE coated stud?

A PTFE coated stud is a threaded bolt — typically B7 grade — coated with a low-friction fluoropolymer (PTFE) layer. The coating provides corrosion resistance, a very low coefficient of friction and ease of installation and removal in aggressive industrial atmospheres.

Q2: Why choose PTFE coating over hot dip, cadmium or zinc plating?

Traditional platings do not withstand the corrosive atmospheres found in many industries and provide inconsistent friction, leading to uneven bolt loads. PTFE coating delivers better corrosion resistance, repeatable tensioning and much easier removal after years in service.

Q3: What is the most common combination?

B7 studs with 2H nuts is by far the most widely specified combination, used on flange joints in petrochemical, chemical, power and offshore piping.

Q4: Can you coat existing studs and bolts?

Yes. We offer PTFE coating as a service — send us your existing studs, bolts or nuts and we will coat them to the same specification. Contact us for a coating-only quotation.

Q5: What information do you need to quote?

Please provide: stud diameter, thread pitch, length, base material grade, nut specification (if required) and quantity. A flange bolt schedule or drawing is ideal.

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