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): 3/8"
- Thread Length (Nominal): 0.375"
- 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
Head Height, Overall 0.32"
System of Measurement Inch
Across Flats (Maximum) 0.5"
Diameter (Dimension) 0.3125"
Thread Length (Nominal) 0.375"
Product Class Externally Threaded Fasteners
Thread Length Full Thread
Hardness Rating Rockwell C25-C34
Across Flats (Basic) 1/2"
Material Processes Quenched and Tempered
Head Style Hex Flange Head
POS BO028-51618X38-002000
Brand Aspen Fasteners
Order Machine Thread Fasteners
Flange Diameter 0.706"
Material Steel
Drive Style External Hex Drive
Origin Origin Undefined
Coating Zinc Plated
Thread Direction Right-Hand Thread
Thread Pitch 18
Category Flange Screws
Coating Color Clear
cad_3d_viewer_url https||//3d.aspenfasteners.com/viewer/?cad_model=obj/BO028-51618X38
Material Grade Grade 5
Across Flats (Minimum) 0.491"
Length (Nominal) 3/8"
Diameter (Nominal) 5/16"
Head Style Detail Locking Serrations
