Proflow 12pt Flange Nuts are engineered to deliver superior clamping strength, reliability, and ease of installation for high-performance engine builds. Manufactured from premium alloy steel and heat-treated for maximum durability, these flange nuts provide the secure retention needed to handle extreme vibration, high cylinder pressures, and demanding RPM levels.

Each nut features a wide integrated flange designed to evenly distribute load across the mating surface, improving gasket sealing and reducing the risk of fastener loosening. Precision-rolled threads ensure smooth engagement, greater fatigue resistance, and more accurate torque readings. A protective black oxide finish adds corrosion resistance for long-lasting performance in any environment

 

  • Premium alloy steel construction

  • Precision heat-treated for superior strength

  • Wide integrated flange for improved load distribution

  • Rolled threads for enhanced fatigue resistance

  • Black oxide finish for corrosion protection

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