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): 3-3/4"
- 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
Coating Color Yellow
Thread Pitch 20
Across Flats (Basic) 7/16"
Diameter (Nominal) 1/4"
Coating Zinc Plated
System of Measurement Inch
Head Height, Overall (Minimum) 0.150"
cad_3d_viewer_url https||//3d.aspenfasteners.com/viewer/?cad_model=obj/BO020-1420X334
Head Markings Six radial lines 60 degrees apart and manufacturer ID
Drive Style External Hex Drive
Diameter (Maximum) 0.250"
Head Height, Overall (Maximum) 0.163"
Product Class Externally Threaded Fasteners
cad_3d_file_url https||//3d.aspenfasteners.com/assets/obj/BO020-1420X334.zip
Head Style Hex Head
Head Height, Overall 0.1563"
Origin Made in U.S.A.
Thread Length (Nominal) 0.75"
Across Flats (Maximum) 0.438"
Thread Direction Right-Hand Thread
Pitch UNC Coarse Thread
Point Chamfered Point
Diameter (Dimension) 0.25"
Across Flats (Minimum) 0.428"
Length (Nominal) 3-3/4"
Brand Aspen Fasteners
Order Machine Thread Fasteners
Head Style Detail Washer Face
Diameter (Minimum) 0.245"
Material Grade Grade 8
POS BO020-1420X334-000500
Category Cap Screws
Material Steel
Standards and Specifications ASME B18.2.1 and SAE J429
