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): 5/16"
- Thread Pitch: 18
- Diameter (Dimension): 0.3125"
- Diameter (Minimum): 0.3065"
- Diameter (Maximum): 0.3125"
- Length (Nominal): 3"
- Thread Length (Nominal): 0.875"
- Across Flats (Basic): 1/2"
- Across Flats (Minimum): 0.489"
- Across Flats (Maximum): 0.500"
- Head Height, Overall: 0.2031"
- Head Height, Overall (Minimum): 0.195"
- Head Height, Overall (Maximum): 0.211"
- 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
Thread Pitch 18
Coating Color Yellow
Length (Nominal) 3"
Pitch UNC Coarse Thread
Across Flats (Minimum) 0.489"
Head Height, Overall (Maximum) 0.211"
Point Chamfered Point
Thread Length (Nominal) 0.875"
Material Steel
cad_3d_file_url https||//3d.aspenfasteners.com/assets/obj/BO020-51618X3.zip
Origin Made in U.S.A.
Category Cap Screws
Head Markings Six radial lines 60 degrees apart and manufacturer ID
Head Height, Overall (Minimum) 0.195"
Order Machine Thread Fasteners
Across Flats (Basic) 1/2"
Head Height, Overall 0.2031"
POS BO020-51618X3-000500
Across Flats (Maximum) 0.500"
Diameter (Dimension) 0.3125"
Thread Direction Right-Hand Thread
Diameter (Nominal) 5/16"
Product Class Externally Threaded Fasteners
Diameter (Minimum) 0.3065"
Head Style Hex Head
Diameter (Maximum) 0.3125"
Head Style Detail Washer Face
Material Grade Grade 8
Standards and Specifications ASME B18.2.1 and SAE J429
Coating Zinc Plated
System of Measurement Inch
cad_3d_viewer_url https||//3d.aspenfasteners.com/viewer/?cad_model=obj/BO020-51618X3
Drive Style External Hex Drive
Brand Aspen Fasteners
