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): 4"
- 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
Brand Aspen Fasteners
Drive Style External Hex Drive
Thread Pitch 18
Order Machine Thread Fasteners
Across Flats (Basic) 1/2"
Flange Diameter 0.706"
Coating Color Black
Across Flats (Minimum) 0.491"
Standards and Specifications IFI-111, ASME B18.2.1 and SAE J429
Thread Length (Nominal) 0.875"
System of Measurement Inch
Thread Length Part Thread
Diameter (Nominal) 5/16"
Origin Origin Undefined
Thread Direction Right-Hand Thread
Material Steel
Material Grade Grade 8
Product Class Externally Threaded Fasteners
Head Height, Overall 0.32"
Head Style Hex Indented Flange Head
Coating Phosphate Coated and Oiled
Diameter (Dimension) 0.3125"
Length (Nominal) 4"
Across Flats (Maximum) 0.5"
Category Flange Bolts
cad_3d_viewer_url https||//3d.aspenfasteners.com/viewer/?cad_model=obj/BO027-51618X4
POS BO027-51618X4-000500
