Product Description
- Hex cap screws are manufactured to tighter tolerances as compared to hex bolts.
- The heads of grade 8 steel fasteners are typically marked with 6 raised radial lines.
- The washer face under the head provides a precision bearing surface.
- Grade 8 steel fasteners have a minimum tensile strength of 150,000 pounds per square inch.
- The chamfered point improves engagement with a nut or pre-tapped hole.
- Diameter (Nominal): 1/4"
- Thread Pitch: 20
- Diameter (Dimension): 0.25"
- Diameter (Minimum): 0.245"
- Diameter (Maximum): 0.250"
- Length (Nominal): 4-1/4"
- Thread Length (Nominal): 0.75"
- Across Flats (Basic): 7/16"
- Across Flats (Minimum): 0.428"
- Across Flats (Maximum): 0.438"
- Head Height, Overall: 0.1563"
- Head Height, Overall (Minimum): 0.150"
- Head Height, Overall (Maximum): 0.163"
- Category: Cap Screws
- System of Measurement: Inch
- Brand: Aspen Fasteners
- Head Style: Hex Head
- Head Style Detail: Washer Face
- Head Markings: Six radial lines 60 degrees apart and manufacturer ID
- Drive Style: External Hex Drive
- Pitch: UNC Coarse Thread
- Thread Direction: Right-Hand Thread
- Point: Chamfered Point
- Material: Steel
- Material Grade: Grade 8
- Coating: Zinc Plated
- Coating Color: Yellow
- Origin: Made in U.S.A.
- Standards and Specifications: ASME B18.2.1 and SAE J429
Product Videos
Custom Field
Standards and Specifications ASME B18.2.1 and SAE J429
Material Grade Grade 8
Head Style Detail Washer Face
Diameter (Dimension) 0.25"
Head Height, Overall (Maximum) 0.163"
Thread Pitch 20
Drive Style External Hex Drive
Product Class Externally Threaded Fasteners
Origin Made in U.S.A.
Thread Length (Nominal) 0.75"
Coating Zinc Plated
Across Flats (Maximum) 0.438"
Head Height, Overall (Minimum) 0.150"
Thread Direction Right-Hand Thread
Material Steel
Brand Aspen Fasteners
Across Flats (Minimum) 0.428"
Diameter (Nominal) 1/4"
POS BO020-1420X414-000450
Head Markings Six radial lines 60 degrees apart and manufacturer ID
Category Cap Screws
cad_3d_viewer_url https||//3d.aspenfasteners.com/viewer/?cad_model=obj/BO020-1420X414
Diameter (Maximum) 0.250"
Point Chamfered Point
Across Flats (Basic) 7/16"
Length (Nominal) 4-1/4"
Diameter (Minimum) 0.245"
cad_3d_file_url https||//3d.aspenfasteners.com/assets/obj/BO020-1420X414.zip
Head Height, Overall 0.1563"
Head Style Hex Head
Coating Color Yellow
Pitch UNC Coarse Thread
Order Machine Thread Fasteners
System of Measurement Inch
