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): 1/4"
- Thread Pitch: 20
- Diameter (Dimension): 0.25"
- Length (Nominal): 1"
- Thread Length (Nominal): 1"
- Across Flats (Basic): 3/8"
- Across Flats (Minimum): 0.367"
- Across Flats (Maximum): 0.375"
- Head Height, Overall: 0.28"
- Flange Diameter: 0.565"
- 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
Material Processes Quenched and Tempered
Material Steel
Product Class Externally Threaded Fasteners
Brand Aspen Fasteners
Hardness Rating Rockwell C25-C34
Thread Pitch 20
Thread Length Full Thread
Thread Length (Nominal) 1"
Flange Diameter 0.565"
Diameter (Dimension) 0.25"
Diameter (Nominal) 1/4"
Head Style Detail Locking Serrations
System of Measurement Inch
Thread Direction Right-Hand Thread
Order Machine Thread Fasteners
Length (Nominal) 1"
Coating Color Clear
Origin Origin Undefined
Across Flats (Maximum) 0.375"
Across Flats (Minimum) 0.367"
Drive Style External Hex Drive
Across Flats (Basic) 3/8"
Coating Zinc Plated
cad_3d_viewer_url https||//3d.aspenfasteners.com/viewer/?cad_model=obj/BO028-1420X1
Head Height, Overall 0.28"
Head Style Hex Flange Head
Category Flange Screws
POS BO028-1420X1-002000
Material Grade Grade 5
