Product Description
- Sometimes called Frame Bolts as these bolts are commonly used on truck frames.
- Also known as hex flange screws or hex washer bolts.
- Flange under the head acts like a washer to increase the bearing surface and distribute the load.
- The heads of grade 8 steel fasteners are typically marked with 6 raised radial lines.
- Grade 8 steel fasteners have a minimum tensile strength of 150,000 pounds per square inch.
- Diameter (Nominal): 5/16"
- Thread Pitch: 18
- Diameter (Dimension): 0.3125"
- Length (Nominal): 3-1/2"
- Thread Length (Nominal): 0.875"
- Across Flats (Basic): 1/2"
- Across Flats (Minimum): 0.491"
- Across Flats (Maximum): 0.5"
- Head Height, Overall: 0.32"
- Flange Diameter: 0.706"
- Category: Flange Bolts
- System of Measurement: Inch
- Brand: Aspen Fasteners
- Head Style: Hex Indented Flange Head
- Drive Style: External Hex Drive
- Thread Length: Part Thread
- Thread Direction: Right-Hand Thread
- Material: Steel
- Material Grade: Grade 8
- Coating: Phosphate Coated and Oiled
- Coating Color: Black
- Origin: Origin Undefined
- Standards and Specifications: IFI-111, ASME B18.2.1 and SAE J429
Product Videos
Custom Field
Coating Color Black
Thread Length Part Thread
System of Measurement Inch
Standards and Specifications IFI-111, ASME B18.2.1 and SAE J429
Thread Pitch 18
Diameter (Dimension) 0.3125"
Across Flats (Maximum) 0.5"
Flange Diameter 0.706"
Diameter (Nominal) 5/16"
Material Steel
Across Flats (Basic) 1/2"
Thread Length (Nominal) 0.875"
Head Height, Overall 0.32"
Brand Aspen Fasteners
Order Machine Thread Fasteners
Across Flats (Minimum) 0.491"
Drive Style External Hex Drive
Category Flange Bolts
Head Style Hex Indented Flange Head
cad_3d_viewer_url https||//3d.aspenfasteners.com/viewer/?cad_model=obj/BO027-51618X312
Coating Phosphate Coated and Oiled
Origin Origin Undefined
Product Class Externally Threaded Fasteners
Thread Direction Right-Hand Thread
Material Grade Grade 8
POS BO027-51618X312-000500
Length (Nominal) 3-1/2"
