5/16-18 Grade 8 Indented Hex Flange Screws (Frame Bolts) – Black Phosphate & Oil
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5/16-18 Grade 8 Indented Hex Flange Screws (Frame Bolts) – Black Phosphate & Oil

$4.28
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5/16"-18 Grade 8 Indented Hex Flange Screws (Frame Bolts) Heavy-Duty Grade 8 Alloy Steel with Black Phosphate & Oil Finish Upgrade your fastening solution with our premium 5/16"-18 Grade 8 Indented Hex Flange Screws, also known as Frame Bolts or Hex Flange Screws. Built from high-strength Grade 8 alloy steel, these bolts feature a built-in flange head for even load distribution and a durable black phosphate & oil finish for mild corrosion resistance and improved torque performance. Perfect for automotive, construction, and heavy machinery applications. Key Features Diameter: 5/16 inch Thread Size: 5/16"-18 (18 TPI) – Coarse Thread Thread Length: Available in Full or Partial Thread (FT = Full Thread) Wrench Size (Across Flats): 1/2 inch Head Style: Indented Hex Flange Head Finish: Black Phosphate & Oil for mild corrosion resistance and installation lubrication System of Measurement: Inch (Imperial / US) Material: Grade 8 Alloy Steel Specifications: SAE J429 / ASME

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