Product Description
- Also known as hex flange bolts, frame bolts or hex washer bolts.
- Flange under the head acts like a washer to increase the bearing surface and distribute the load.
- Serrated teeth under the head bite into the mating surface as tightened to prevent loosening.
- The heads of grade 5 steel fasteners are typically marked with 3 raised radial lines.
- Grade 5 steel fasteners have a minimum tensile strength of 105,000 pounds per square inch.
- Diameter (Nominal): 5/16"
- Thread Pitch: 18
- Diameter (Dimension): 0.3125"
- Length (Nominal): 1/2"
- Thread Length (Nominal): 0.5"
- 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 Screws
- System of Measurement: Inch
- Brand: Aspen Fasteners
- Head Style: Hex Flange Head
- Head Style Detail: Locking Serrations
- Drive Style: External Hex Drive
- Thread Length: Full Thread
- Thread Direction: Right-Hand Thread
- Material: Steel
- Material Grade: Grade 5
- Material Processes: Quenched and Tempered
- Coating: Zinc Plated
- Coating Color: Clear
- Hardness Rating: Rockwell C25-C34
- Origin: Origin Undefined
Product Videos
Custom Field
Brand Aspen Fasteners
Order Machine Thread Fasteners
Head Height, Overall 0.32"
Category Flange Screws
Diameter (Nominal) 5/16"
Product Class Externally Threaded Fasteners
Length (Nominal) 1/2"
Material Steel
Origin Origin Undefined
Material Grade Grade 5
Hardness Rating Rockwell C25-C34
Thread Length (Nominal) 0.5"
Coating Color Clear
Flange Diameter 0.706"
Material Processes Quenched and Tempered
Across Flats (Maximum) 0.5"
Thread Length Full Thread
Head Style Detail Locking Serrations
Across Flats (Basic) 1/2"
Drive Style External Hex Drive
POS BO028-51618X12-001500
cad_3d_viewer_url https||//3d.aspenfasteners.com/viewer/?cad_model=obj/BO028-51618X12
Across Flats (Minimum) 0.491"
Head Style Hex Flange Head
System of Measurement Inch
Diameter (Dimension) 0.3125"
Thread Direction Right-Hand Thread
Coating Zinc Plated
Thread Pitch 18
