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): 3/4"
- Thread Length (Nominal): 0.75"
- 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
Product Class Externally Threaded Fasteners
Across Flats (Maximum) 0.375"
Thread Length (Nominal) 0.75"
Order Machine Thread Fasteners
Head Height, Overall 0.28"
Material Steel
Material Grade Grade 5
Hardness Rating Rockwell C25-C34
Flange Diameter 0.565"
Thread Direction Right-Hand Thread
Across Flats (Basic) 3/8"
Origin Origin Undefined
cad_3d_viewer_url https||//3d.aspenfasteners.com/viewer/?cad_model=obj/BO028-1420X34
Category Flange Screws
Thread Length Full Thread
POS BO028-1420X34-002500
Material Processes Quenched and Tempered
Brand Aspen Fasteners
Across Flats (Minimum) 0.367"
System of Measurement Inch
Coating Color Clear
Drive Style External Hex Drive
Coating Zinc Plated
Head Style Hex Flange Head
Thread Pitch 20
Diameter (Dimension) 0.25"
Head Style Detail Locking Serrations
Length (Nominal) 3/4"
Diameter (Nominal) 1/4"
