12-Point FLANGE BOLTS
Introduction to 12-POINT Bolts
Standards and SURFACE TREATMENT
- IFI 115 is a standard developed through the procedures of Industrial Fasteners Institute. IFI-115 was first published in 1970 and revised and reissued in 1986, 2002 and 2014. Screws made to IFI-115 are interchangeable with parts made to SAE J58.
- PTFE coating is a fluorine coating based on polytetrafluoroethylene resin, known for its corrosion resistance and non adhesiveness. This coating can withstand the highest continuous use temperature (260°C [500°F]), the lowest friction coefficient, good wear resistance, and chemical corrosion resistance. DuPont’s registered trademark Teflon™ for fluoropolymer products. PTFE industrial coatings are commonly used in fields such as chemical, mechanical, electronic, and medical industries.
Materials and practicality
- ISO 898-1 Mechanical properties of fasteners made of carbon steel and alloy steel. Part 1: Bolts, screws and studs with specified property classes -Coarse thread and fine pitch thread. Class 12.9 minimum tensile strength of 1220 MPa and a hardness between 39-44 HRC.
- 12.9 grade bolts are the highest grade of high-strength bolts (usually referred to as ultra high strength bolts), with extremely high tensile strength and hardness, widely used in core mechanical parts that can withstand severe vibrations, high loads, and alternating stresses (such as engine cylinder heads, heavy lifting machinery, aerospace structural components, etc.)
- Size (M2 to M56, 3/8″ to 4″)
- Standard (ISO, DIN, ASME, IFI, JIS and SAE)
- Material (Carbon steel, Alloy steel, Stainless steel, Super duplex steels, Titanium alloys)
- Heat treatment (Solution Annealing, Annealing, Quenching and Tempering, Quenching, Tempering, Stress Relieving, Induction Hardening)
Material List
Nickel alloys
Carbon steel
Stainless steel
Titanium alloys
Super duplex steels
12 Point FLANGE BOLTS used in the automotive industry
Excellent performance visualization
Showcase the use of our high-temperature alloy material 12 Point FLANGE BOLTS in engine connecting rods, which connects the piston and crankshaft connecting rod ends and withstands severe tensile stress at thousands of revolutions per minute (RPM). After years of evaluation by R&D engineers, it can operate stably and is very suitable for the current working conditions.
Full Traceability
At HOTFORGE INDUSTRIAL LIMITED, traceability is a complete system linking each fastener to its raw material heat number, MTC (3.1/3.2), and production batch. From forging and heat treatment to machining, surface finishing, and inspection, all processes are recorded and fully traceable.
Each bolt is also marked on the head with manufacturer logo, material grade, and strength class for easy identification. All test results and production data are stored and connected to each batch, ensuring full transparency and reliable quality control for industries such as oil & gas, petrochemical, and power generation.
Third party laboratory
At HOTFORGE INDUSTRIAL LIMITED, every production batch is fully verified through both our in-house laboratory and accredited third-party testing facilities. Each batch undergoes strict inspection and testing, including mechanical properties, chemical composition, and material identification, ensuring full compliance with international standards. The combination of independent internal testing and external third-party validation provides dual assurance of quality, reliability, and traceability, delivering consistent and trustworthy performance for critical applications in industries such as oil & gas, petrochemical, and power generation.
Delivery guarantee
We ensure efficient and reliable global delivery through a well-established logistics network. Our factory transportation department is equipped with trucks that can quickly and economically transport to major ports. We work closely with leading airlines and shipping companies to simplify cargo handling, reduce unnecessary delays in documentation and coordination. In addition, our international logistics partners provide complete destination services, including last mile delivery and door-to-door solutions. This integrated supply chain system significantly improves transportation efficiency and ensures timely and perfect delivery of each project.
FAQs
Our factory has obtained ISO9001，ISO14001，ISO45001，IATF 16949，PED 2014/68/EU，API 20E / API 20F，ISO 17025 certification.
Yes, all high nickel alloy and special stainless steel fasteners (such as Alloy C276, Inconel, etc.) manufactured by HOTFORGE are strictly accompanied by material testing certificates that comply with EN 10204 3.1 standards. In addition, we can also provide third-party classification society 3.2 certificates for your special projects.
At present, I do not have a minimum order quantity requirement for the production department, and I can provide free samples for professional users to conduct experiments.
For standard inventory sizes, we can ship within 3-7 days.
For customized manufacturing or large-scale project bidding, our typical delivery cycle is 3 to 6 weeks, depending on the availability and quantity of materials. We always provide a guaranteed delivery date in the commercial invoice.
We support standard international payment methods such as T/T and L/C at sight.
For shipping, we offer flexible incoterms including FOB, CIF, CFR, DAP, and DDP via reliable global logistics partners.
Contact our sales team
If you are looking for reliable fastener solutions, our team is ready to provide a fast and accurate quotation based on your technical requirements, material specifications, and application conditions. At HOTFORGE INDUSTRIAL LIMITED, we support customized manufacturing, stable pricing, and prompt response for all inquiries. Simply click the “Request a Quote” button and our sales engineer will get back to you with a professional solution as soon as possible.