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): 3/4"
- Thread Length (Nominal): 0.75"
- 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
Across Flats (Basic) 1/2"
Order Machine Thread Fasteners
Diameter (Dimension) 0.3125"
Length (Nominal) 3/4"
cad_3d_viewer_url https||//3d.aspenfasteners.com/viewer/?cad_model=obj/BO028-51618X34
Diameter (Nominal) 5/16"
Category Flange Screws
Product Class Externally Threaded Fasteners
Coating Zinc Plated
Coating Color Clear
Flange Diameter 0.706"
Thread Pitch 18
POS BO028-51618X34-001250
Brand Aspen Fasteners
Origin Origin Undefined
Head Style Hex Flange Head
Material Steel
Material Processes Quenched and Tempered
Thread Direction Right-Hand Thread
Across Flats (Maximum) 0.5"
Hardness Rating Rockwell C25-C34
Head Style Detail Locking Serrations
Thread Length (Nominal) 0.75"
Drive Style External Hex Drive
Across Flats (Minimum) 0.491"
Head Height, Overall 0.32"
Thread Length Full Thread
System of Measurement Inch
Material Grade Grade 5
