Global Supplier of High-Performance Coated Fasteners
Stud Bolt India is a premier manufacturer and exporter of high-durability coated fasteners, specializing in PTFE, Xylan®, Fluorocarbon, Zinc-Nickel, and Hot-Dip Galvanized bolting solutions engineered for harsh industrial duty.
Our engineered surface coatings provide exceptional barrier protection against marine corrosion, chemical attack, extreme thermal stress, and galvanic oxidation. Combining hot precision forging, CNC thread rolling, and controlled multi-layer coating application, we supply heavy hex bolts, flange nuts, U-bolts, double-ended studs, and washers that meet rigorous international oil & gas standards.
Superior Corrosion Shield
Resists salt spray testing up to 3,000+ hours without red rust.
Anti-Galling Properties
Consistent torque-tension ratio with low friction coefficient (0.06 – 0.08).
EN 10204 3.1 Certified
100% heat-traceable raw material with full coating thickness verification.
Thermal Resistance
Operation capabilities ranging from cryogenic -250°C up to high-temp +400°C.
Types of Engineered Coated Fasteners
We produce an extensive portfolio of protective-coated industrial bolting tailored to client engineering drawings and ASTM/ASME specifications.
Blue Zinc Plated Nuts
Hot Dip Galvanized Hex Nuts
PTFE Coated Lock Nuts
Yellow Zinc Plated Flange Nuts
Aluminium Zinc Flake Lock Nuts
Black Zinc Plated Dome Nuts
Black Phosphate Square Nuts
Electroless Nickel Wing Nuts
Coating Specifications & Technical Standards
Detailed technical overview of our protective coating options applied over carbon steel, alloy steel, and stainless steel base fasteners.
| Coating Category | Coating System / Brand Grade | Layer Thickness & Characteristics | Applicable Standards |
|---|---|---|---|
| Fluorocarbon / PTFE Coating | Xylan® 1014, Xylan® 1070, Xylan® 1424, Xylar® 2 | 15 – 35 µm dry film; organic solvent-borne fluoropolymer matrix; low friction coefficient. | ASTM F3125, ASME B18.31.2, Whitford Spec |
| Electroplated Zinc & Alloys | Zinc (Blue / Yellow / Black), Zinc-Nickel (88/12 alloy) | 8 – 25 µm deposit; passivated surface with high resistance to sacrificial white/red rust. | ASTM F1941 / F1941M, ISO 4042 |
| Galvanizing Coatings | Hot-Dip Galvanized (HDG), Mechanical Galvanized | 45 – 85 µm zinc layer bond; heavy-duty exterior atmospheric corrosion protection. | ASTM A153 / A153M, ASTM F2329, ISO 10684 |
| Specialized Ceramic & Polymer Systems | SermaGard® 1105, SermaGard® 1280, Molykote® 7409 | Corrosion-inhibiting ceramic basecoat with lubricated barrier topcoat for high-temperature pipelines. | MIL-PRF-46010, OEM Engineering Specs |
| Duplex Composite Systems | Zinc-Plating + PTFE, HDG + Xylan® 1424 Blue, Cadmium + PTFE | Multi-layer barrier coating combining cathodic metal protection with chemical-resistant fluoropolymer. | NACE MR0175 / ISO 15156 Compliant |
Seaworthy Packaging & Global Logistics
To safeguard critical coating layers against impact, scratching, and moisture during ocean transit, every order undergoes strict packaging protocols.
- Heavy-Duty Wooden Crates (ISPM 15 Heat-Treated)
- VCI Corrosion-Inhibitor Polybags
- Individual Thread Protector Caps
- Heavy Corrugated Box Packing
- Color-Coded Grade Identification Tags
- EN 10204 3.1 Material Test Reports Included
Serving Critical Industrial Sectors
Our coated fasteners are installed in major EPC projects, subsea pipelines, and refinery turnarounds across 24+ countries.
Petrochemical Processing
PTFE and Xylan coated stud bolts for heat exchangers, pressure vessels, and aggressive chemical lines.
Oil & Gas / Offshore
Xylan 1070 blue coated ASTM A193 B7/B7M studs for subsea Xmas trees and offshore platforms.
Marine & Shipyard
Hot-dip galvanized and zinc-nickel coated fasteners providing marine splash-zone protection.
Power & Energy
High-tensile coated bolting engineered for thermal cycle stability and vibration resistance.
Global Supply & Export Coverage
Supplying certified coated fasteners to major industrial hubs, sea ports, and project sites worldwide.
Frequently Asked Questions
What surface coating systems do you offer for industrial fasteners?
How do PTFE and Xylan coatings extend fastener service life?
What international quality standards do your coated fasteners comply with?
Request a Quick Quote for Coated Fasteners
Send us your specifications, required coating type (PTFE/Xylan/HDG/Zinc-Nickel), material grade, and project quantity. Our engineers will respond within 24 hours.