From OE Standards to High-Performance Custom Fasteners
In high-performance engine upgrades, motorsports, and demanding industrial settings, fastener reliability determines system stability and safety. Based on aerospace, military-grade, and racing alloys, we proudly introduce our high-strength engine fasteners engineered for critical engine zones under extreme conditions.
We not only supply performance-grade engine fasteners but also manufacture a complete range of standard fasteners conforming to ASTM/SAE (U.S.) and ISO/DIN/EN (European) standards, including hex bolts, flange bolts, socket head bolts, and wheel bolts.
Materials are available in various strength grades such as Grade 5 / Grade 8 (SAE) and 8.8 / 10.9 / 12.9 (ISO), using high-quality carbon or alloy steels. Surface finishes include zinc plating, hot-dip galvanizing, Dacromet coating, and black oxide.
Whether you need OE-standard fasteners or fully customized high-performance engine bolts, we deliver end-to-end solutions tailored to aftermarket upgrades, industrial installations, and motorsport applications.
Available Materials:
AISI 8740 / EN 34CrNiMo6– Widely used quenched and tempered alloy steel offering cost-effective strength for standard-duty head studs and flywheel bolts.
AISI 4340 mod / 300M / EN 34CrNiMo6– Medium carbon alloy steel with excellent toughness and fatigue resistance. Ideal for crank main bolts and heavy-duty bearing caps.
AISI 4137 / 4140 / EN 25CrMo4 – Tempered alloy steel with high tensile strength and stability. Suitable for connecting rod bolts and cylinder head studs that demand precise preload retention.
300M / 4340 VAR / EN X38CrNiMo4– Aviation-grade alloy steel with high impact resistance. Ideal for flywheel bolts, main studs, and race engine block fasteners.
Inconel 625 / EN 2.4856 – Nickel-based superalloy with excellent creep resistance and corrosion stability. Best suited for turbocharger fasteners and exhaust system bolts.
Ti-6Al-4V / EN 3.7165 – Aerospace-grade titanium alloy offering high strength-to-weight ratio. Ideal for lightweight racing engine applications such as rod bolts and valvetrain fasteners.
Why Choose Our Fasteners:
Proven High-Strength Performance：All fasteners are heat-treated and tested to exceed 180,000 psi tensile strength, ensuring compatibility with high-output engines.
Targeted Optimization for Critical Engine Zones：Each fastener is optimized for specific engine zones such as crankshaft, rods, heads, flywheels, and turbochargers.
Diverse Material Options for Varied Operating Conditions：Material versatility supports a broad spectrum of mechanical and thermal challenges.
Customizable to Your Specifications：Custom manufacturing available based on drawings, coating needs, and batch ID requirements.
Compatible with a Wide Range of Engine Platforms：Supports small-block V8s, inline-6s, twin-turbo V engines, and race-built platforms.
Aerospace Fastening Expertise Inside: Backed by years of experience in aerospace rivets and jet engine fasteners, we bring precision machining, tight batch control, and advanced surface treatments into every fastener we produce.
