Custom Blue PTFE Coated Socket Head Cap Screw Anti Corrosion Hex Socket Bolt for Offshore Oil Gas and Chemical Equipment

Product Description

Product Highlights
Heavy-Duty Blue PTFE Coated Hex Socket Head Cap Screw (DIN 912 / ISO 4762): A high-strength, marine/industrial-grade precision threaded fastener featuring a knurled cylindrical socket cap head and an advanced fluoropolymer coating for extreme corrosion protection.
Superior Anti-Corrosion, Low Friction & Anti-Galling: The specialized PTFE fluoropolymer barrier provides outstanding resistance against salt spray, harsh chemicals, acids, and atmospheric weathering. It delivers a low coefficient of friction for smooth, uniform torque tightening and prevents thread galling or seizing under high pressure and temperature fluctuations.
High-Strength Alloy Base with Dual-Layer Protective Coating: Substrate Material: High-tensile Alloy Steel / Carbon Steel (Grade 8.8 / 10.9 / 12.9 / ASTM A193 B7) precision-machined for maximum load-bearing and tensile strength. Surface Treatment: Dual-layer corrosion barrier - electroplated phosphate/zinc base topped with premium baked-on Blue PTFE (Teflon / Xylan 1070/1424) coating for maximum wear resistance.
Engineered for Severe Marine, Chemical & Subsea Environments: Widely utilized in Offshore oil & gas platforms, subsea equipment, petrochemical processing plants, marine valve & flange piping, chemical reactors, wastewater treatment, wind power, and coastal industrial facilities.
Direct Manufacturer Reliability & Support: Certified Quality: 100% compliant with international DIN 912 / ISO 4762 / ASME B18.3 standards with salt spray test certification (1000–3000+ hours). Customization (OEM/ODM): Custom thread sizes (M4 to M36+ / UNC/UNF), lengths, coating thicknesses, colors (Blue/Green/Black/Red), and industrial bulk packaging. Worry-Free After-Sales: Large ready-to-ship inventory, factory-direct bulk wholesale discounts, free test samples, and dedicated 24/7 technical customer support.
Scene Image
Specifications
Detail Shot
Other Product Images
About The Supplier
Qingdao Tongkuai Fasteners Co., Ltd. is a specialized industrial fastener manufacturing enterprise that integrates research and development, production, sales, and service. With years of deep cultivation in the fastener field, it has become a trusted fastener solution provider in the industry with exquisite craftsmanship and strict quality. The factory uses raw materials from first-class steel mills both domestically and internationally, and produces products strictly in accordance with the ISO9001 international quality management system. Product standards: GB (National Standard), ISO (International Standard), DIN (German Standard), ANSI (American Standard), BS (British Standard), JIS (Japanese Standard) and other standards; Non standard products can be customized according to customer drawing requirements. TOKCH fasteners are widely used in high-speed rail, subway, aerospace, wind power, automotive, and communication equipment industries such as equipment, petrochemicals, marine equipment, new energy, and ship equipment; And provide professional fastener solutions and related supporting services. The company always adheres to the concept of quality first and customer foremost, focusing on creating high-quality fastener products and continuously providing customers with high-quality and reliable fastening matching services. Universal standard rapid response service worldwide!
Company Overview
Frequently Asked Questions
QAre you a manufacturer or trading company?
Qingdao Tongkuai Industrial Technology Co., Ltd. is a professional fastener manufacturer and supplier based in China. We have our own production, quality inspection and technical support capabilities, while also integrating qualified supply-chain resources to provide customers with a wider range of standard and customized fasteners.
QWhat types of fasteners do you manufacture and supply?
We supply a wide range of industrial fasteners, including bolts, nuts, screws, washers, threaded rods, studs, locking fasteners, stamping parts, CNC machined parts and customized non-standard components. Products can be manufactured according to DIN, ISO, ANSI, ASME, ASTM, GB, JIS and customer-specific standards.
QWhat materials are available for your fasteners?
Our commonly used materials include carbon steel, alloy steel, stainless steel, brass, copper, titanium, engineering plastics and special alloys. Typical material options include stainless steel 304, 316 and 316L, alloy steel 35CrMo and 42CrMo, as well as different carbon steel strength grades. Material selection can be recommended according to the application environment and performance requirements.
QWhat strength grades and surface treatments can you provide?
We can supply fasteners in various strength grades, including 4.8, 5.8, 8.8, 10.9 and 12.9, as well as stainless steel grades such as A2-70, A4-70 and A4-80. Available surface treatments include zinc plating, hot-dip galvanizing, black oxide, zinc-nickel coating, Dacromet, Geomet, phosphating, passivation and PTFE coating.
QCan you manufacture customized fasteners according to drawings or samples?
Yes. We provide OEM and customized fastener manufacturing services based on customer drawings, samples or technical specifications. Our team can evaluate the material, dimensions, tolerances, mechanical properties, surface treatment and inspection requirements before quotation and production.
QCan you provide material certificates and inspection reports?
Yes. Material certificates, dimensional inspection reports, mechanical property reports, coating reports and other quality documents can be provided according to the product and order requirements. EN 10204 3.1 or third-party inspection can also be arranged when specified before order confirmation.

Related Products

Contact Us