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"
- 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
Point Chamfered Point
Diameter (Minimum) 0.245"
Order Machine Thread Fasteners
Thread Pitch 20
Head Height, Overall 0.1563"
Head Style Hex Head
Drive Style External Hex Drive
cad_3d_file_url https||//3d.aspenfasteners.com/assets/obj/BO020-1420X4.zip
Head Markings Six radial lines 60 degrees apart and manufacturer ID
Material Steel
Origin Made in U.S.A.
Head Height, Overall (Maximum) 0.163"
POS BO020-1420X4-000450
System of Measurement Inch
Head Height, Overall (Minimum) 0.150"
Brand Aspen Fasteners
Across Flats (Minimum) 0.428"
Category Cap Screws
Thread Length (Nominal) 0.75"
Coating Zinc Plated
cad_3d_viewer_url https||//3d.aspenfasteners.com/viewer/?cad_model=obj/BO020-1420X4
Pitch UNC Coarse Thread
Thread Direction Right-Hand Thread
Material Grade Grade 8
Across Flats (Maximum) 0.438"
Product Class Externally Threaded Fasteners
Across Flats (Basic) 7/16"
Coating Color Yellow
Diameter (Nominal) 1/4"
Diameter (Maximum) 0.250"
Length (Nominal) 4"
Diameter (Dimension) 0.25"
Standards and Specifications ASME B18.2.1 and SAE J429
Head Style Detail Washer Face
