Coated and plated stud bolts
A193 B7 studs and A194 2H heavy hex nuts supplied plain, blue PTFE coated, cadmium or zinc plated, or galvanized, to the coating specification on your order.
Coated bolting, defined by the specification.
Cyclone lists its B7 stud assemblies and 2H heavy hex nuts plain, TFE blue and cadmium plated, and its line card adds zinc, black oxide, hot-dip and mechanical galvanizing, Modumetal® NanoGalv®, Xylan®, Fluorokote #1® and Sermagard®. Coating and plating are performed by partner facilities. Send the coating specification with your RFQ, including the product or standard, color, thickness and any testing, so the finish on the order is the one your project calls for.
- A193 B7 studs, 1/4 in. through 4 in.
- A194 2H heavy hex nuts in matching finishes
- Coating specification confirmed with your RFQ
Specify the coating product or standard, color, thickness or class, testing, quantity, and required delivery.
Finish options
| Finish | Description |
|---|---|
| Plain | Uncoated alloy steel, as manufactured |
| TFE blue | Blue PTFE-based fluoropolymer coating, often called blue Teflon or blue-coated studs |
| Cadmium plated | Electroplated cadmium. ASTM B766 is the specification most often referenced |
| Zinc plated | Electroplated zinc. ASTM B633 is the specification most often referenced |
| Hot-dip galvanized | Zinc applied by hot dipping. ASTM F2329 covers hot-dip coating of fasteners |
| Mechanically galvanized | Zinc applied by mechanical plating rather than hot dipping |
| Black oxide | A thin black conversion finish |
| Proprietary coatings | Modumetal® NanoGalv®, Xylan®, Fluorokote #1® and Sermagard® |
| Applied by | Partner coating and plating facilities, to the requirements on the order |
| Diameter | 1/4" through 4" |
The finishes buyers ask for by name.
Blue PTFE and cadmium are the finishes Cyclone lists for B7 studs and 2H nuts; zinc and galvanizing are on the line card. The coating specification on your order decides the product, thickness and testing.
Blue PTFE coating
A PTFE-based fluoropolymer coating applied to the stud and nuts and cured to a blue finish. Buyers specify it for corrosion resistance and for low, consistent thread friction during make-up and later removal. In the field it goes by TFE blue, blue Teflon, Xylan or simply blue-coated studs. Tell us the exact product or specification your project requires.
Cadmium plating
An electroplated cadmium layer that protects the steel sacrificially and adds lubricity. ASTM B766 is the specification most often referenced. Cadmium is restricted in some industries and regions, so confirm that your project specification permits it.
Zinc plating and galvanizing
Zinc protects steel sacrificially. Electroplated zinc is a thin finish; hot-dip and mechanical galvanizing apply a heavier zinc layer. State the specification and class or thickness on the order, because the heavier coatings change thread fit.
Coated nuts
A coating adds thickness to the threads. State whether the nuts are to be supplied coated and, where your specification requires it, tapped oversize to suit.
What to include in the RFQ
The coating product or specification, color, thickness or class, any base treatment, salt-spray or other testing, and whether hydrogen embrittlement relief is required by your specification.
Teflon®, Xylan®, Fluorokote #1®, Modumetal®, NanoGalv® and Sermagard® are trademarks of their respective owners. They are named here because buyers search by them. The coating supplied is the one named on your order.
Questions before you quote
Is TFE blue the same as blue Teflon?
They are names for the same kind of finish: a blue PTFE-based fluoropolymer coating. Teflon and Xylan are brand names, so if your specification names a particular product, put that on the order.
Does Cyclone supply cadmium plated bolts?
Cyclone lists cadmium-plated A193 B7 studs and A194 2H heavy hex nuts. For other cadmium-plated bolting, send the requirement and the team will confirm what can be supplied.
Can I order zinc plated or hot-dip galvanized studs?
Yes. Zinc plating, hot-dip galvanizing and mechanical galvanizing are on Cyclone’s line card, along with black oxide, Modumetal® NanoGalv®, Xylan®, Fluorokote #1® and Sermagard®. Send the coating specification with your RFQ.
Does Cyclone apply the coating in-house?
Coating and plating are performed by partner facilities to the requirements on your order, and the finished parts ship from Cyclone.
Who decides which coating suits the service?
The responsible engineer and the project specification. Cyclone supplies the finish named on your order and does not select coatings for an application.