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.
- Diameter (Nominal): 5/16"
- Thread Pitch: 18
- Diameter (Dimension): 0.3125"
- Length (Nominal): 2-1/2"
- Thread Length (Nominal): 2.5"
- 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 Processes: Case Hardened
- Coating: Zinc Plated
- Coating Color: Clear
- Hardness Rating: Rockwell C40 / Core C26-C34
- Origin: Origin Undefined
Product Videos
Custom Field
Thread Length (Nominal) 2.5"
Product Class Externally Threaded Fasteners
Head Height, Overall 0.32"
Across Flats (Maximum) 0.5"
Order Machine Thread Fasteners
POS BO044-51618X212-000500,BO044-51618X212-000600
Material Processes Case Hardened
Thread Direction Right-Hand Thread
Diameter (Nominal) 5/16"
Head Style Hex Flange Head
Thread Length Full Thread
System of Measurement Inch
Length (Nominal) 2-1/2"
Origin Origin Undefined
Drive Style External Hex Drive
Across Flats (Minimum) 0.491"
Coating Zinc Plated
Diameter (Dimension) 0.3125"
Brand Aspen Fasteners
Thread Pitch 18
Coating Color Clear
Flange Diameter 0.706"
Material Steel
cad_3d_viewer_url https||//3d.aspenfasteners.com/viewer/?cad_model=obj/BO044-51618X212
Category Flange Screws
Hardness Rating Rockwell C40 / Core C26-C34
Across Flats (Basic) 1/2"
Head Style Detail Locking Serrations
